Bloomfield Credit - www.spacefacts.de

Personal: Male, Married, Two children. Born in Flint, Michigan, USA. US Air Force US Air Force

Astronaut Career

Astronaut Group: NASA Group 15 - 1995. Active Entered space service: 9 December 1994. Number of Flights: 3.00. Total Time: 32.46 days.

Official NASA Biography - 1997

NAME: Michael J. Bloomfield (Major, USAF)

NASA Astronaut

PERSONAL DATA:

Born March 16, 1959, in Flint, Michigan. Considers Lake Fenton, Michigan, to be his hometown. Married to the former Lori Miller. They have two children He enjoys reading, gardening, all sporting activities including running, softball, skiing, and any activity with his children His parents, Rodger and Maxine Bloomfield, reside in Linden, Michigan. Her parents, Dave and Donna Miller, reside in Albuquerque, New Mexico.

EDUCATION:

Graduated from Lake Fenton High School, Fenton, Michigan, in 1977. Bachelor of science degree in engineering mechanics from the U.S. Air Force Academy, 1981. Master of science degree in engineering management from Old Dominion University, 1993.

ORGANIZATIONS:

Member of the United States Air Force Academy Association of Graduates, and the Air Force Association.

SPECIAL HONORS:

Captain, 1980 United States Air Force Academy Falcon Football Team. Voted to the 1980 WAC All-Academic Football Team. Commanders Trophy winner as top graduate from Air Force Undergraduate Pilot Training (1983). Distinguished Graduate of USAF Test Pilot School Class 92A. Awarded the Air Force Meritorious Service Medal, the Air Force Commendation Medal, and the Air Force Aerial Achievement Medal.

EXPERIENCE:

Bloomfield graduated from the USAF Academy in 1981. He completed Undergraduate Pilot Training at Vance Air Force Base (AFB), Oklahoma, in 1983, and was selected to fly the F-15. From 1983 until 1986, he served as a combat ready pilot and instructor pilot in the F-15 at Holloman AFB, New Mexico. In 1987, Bloomfield was re-assigned to Bitburg Air Base, Germany, where he served as an F-15 instructor pilot and completed the United States Fighter Weapons Instructor Course. In 1989 he was subsequently assigned to the 48th Fighter Interceptor Squadron at Langley AFB, Virginia. serving as an F-15 squadron weapons officer until 1992, when he was selected for the USAF Test Pilot School. Honored as a distinguished graduate in 1992, Bloomfield remained at Edwards AFB, California, where he conducted tests in all models of the F-16. While a member of the 416th Flight Test Squadron, Bloomfield served as squadron safety officer and as squadron flight commander. In March 1995, he was assigned to NASA as an astronaut candidate.

NASA EXPERIENCE:

Selected by NASA in December 1994, Bloomfield reported to the Johnson Space Center in March 1995, has completed a year of training and evaluation, and is currently qualified for assignment as a shuttle pilot. He was initially assigned to work technical issues for the Operations Planning Branch of the Astronaut Office. He flew on STS-86 and has logged over 259 hours in space.

SPACEFLIGHT EXPERIENCE:

STS-86 Atlantis (September 25 to October 6, 1997) was the seventh mission to rendezvous and dock with the Russian Space Station Mir. Highlights included the exchange of U.S. crew members Mike Foale and David Wolf, a spacewalk by two crew members to retrieve four experiments first deployed on Mir during the STS-76 docking mission, the transfer to Mir of 10,400 pounds of science and logistics, and the return of experiment hardware and specimens to Earth. Mission duration was 169 orbits in 259 hours and 21 minutes, and covered more than 2.2 million miles.

• 26 September 1997 Flight: STS-86. Flight Up: STS-86. Flight Back: STS-86. Flight Time: 10.81 days.

• 1 December 2000 Flight: STS-97. Flight Up: STS-97. Flight Back: STS-97. Flight Time: 10.83 days.

• 8 April 2002 Flight: STS-110. Flight Up: STS-110. Flight Back: STS-110. Flight Time: 10.82 days.

9 June 1995 - NASA Astronaut Training Group 15 selected.. The group was selected to provide pilot, engineer, and scientist astronauts for space shuttle flights.. Qualifications: Pilots: Bachelor's degree in engineering, biological science, physical science or mathematics. Advanced degree desirable. At least 1,000 flight-hours of pilot-in-command time. Flight test experience desirable. Excellent health. Vision minimum 20/50 uncorrected, correctable to 20/20 vision; maximum sitting blood pressure 140/90. Height between 163 and 193 cm.

Mission Specialists: Bachelor's degree in engineering, biological science, physical science or mathematics and minimum three years of related experience or an advanced degree. Vision minimum 20/150 uncorrected, correctable to 20/20. Maximum sitting blood pressure of 140/90. Height between 150 and 193 cm.. 10 pilots and 9 mission specialists, 6 civilians and 13 military officers, chosen from 2,962 applicants, of which 122 screened in June-August 1994. 4 additional international astronauts.

Atlantis undocked from Mir at 17:28 GMT on October 3 and conducted a flyaround focused on the damaged Spektr Module to determine the location of the puncture in its hull. The Mir crew pumped air into the Spektr Module using a pressure regulator valve, and the Shuttle crew observed evidence that, as expected, the leak seemed to be located at the base of the damaged solar panel. Final separation of Atlantis from Mir took place around 20:28 GMT. After two landing attempts were waved off on October 5 due to heavy cloud cover, the crew fired the engines to deorbit at 20:47 GMT on October 6 and landed at Kennedy Space Center at 21:55.

Expedition One Commander Bill Shepherd, Soyuz Commander Yuri Gidzenko and Flight Engineer Sergei Krikalev reported the installation of the final cables to the Russian Elektron system, which produces oxygen by breaking down water through the process of electrolysis. The Elektron is expected to be activated on Thursday and become the primary source of oxygen generation onboard. Up to now, per the preflight plan, Shepherd, Gidzenko and Krikalev have been burning one oxygen producing canister each day per crew member to maintain the proper level of oxygen in the ISS modules.

Meanwhile, Gidzenko and Krikalev completed the installation of a television monitor for a manual backup rendezvous system in the Zvezda module called TORU. The system would be used to guide an unmanned Progress resupply ship in for docking to the ISS in the event the Progress' automated navigation system failed. The next Progress will be launched to the ISS November 16 with a docking planned two days later. The expedition crew will unload the Progress so it can be jettisoned one day after the launch of the Shuttle Endeavour on the STS-97 mission, providing the proper clearance for Endeavour's linkup to a newly installed docking port on the ISS.

The crew for that flight - Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Joe Tanner, Marc Garneau and Carlos Noriega - is at the Kennedy Space Center this week to simulate the final hours of the countdown. It is the final trip to Florida before the scheduled launch November 30 on the next ISS assembly flight to install the large U.S. photovoltaic solar arrays on the station. The arrays will make the ISS the most powerful vehicle ever to fly in space.

Before the crew began its sleep period today, Shepherd reminded flight controllers in Houston that he and his crewmates had completed their first week in space and would hold a "small celebration" to mark the milestone. The trio will be awakened around 10 p.m. beginning another night of work to setup their home in space.

The ISS continues to operate in excellent shape at an altitude of 237 statute miles.

ISS Commander Bill Shepherd, Soyuz Commander Yuri Gidzenko and Flight Engineer Sergei Krikalev reported that all of the gear associated with the Russian Elektron system has now been hooked up with the activation of the unit planned for Thursday. The Elektron uses the process of electrolysis to produce oxygen for the crew, while venting hydrogen overboard. Up to now, per the preflight plan, Shepherd, Gidzenko and Krikalev have been burning one oxygen-producing canister each day per crew member to maintain the proper level of oxygen in the ISS modules.

Krikalev successfully reactivated the ISS air conditioner after it shut itself down due to an excess amount of water in the condensate collection system. The condensate unit absorbs moisture from the air and needs to be emptied periodically. The unit was turned back on after a short outage and is operating normally.

Russian flight controllers continue to prepare for the next Progress resupply vehicle's launch next week from the Baikonur Cosmodrome in Kazakhstan. The Progress is loaded with supplies and spare parts for the crew. Launch is set for the night of November 15, U.S. time, at 7:32 p.m. CST (1:32 GMT November 16). Docking to the Zarya module's nadir port is scheduled for the night of November 17, U.S. time, at 9:07 p.m. CST (3:07 GMT November 18). The Progress will be unloaded by the crew prior to the launch of Endeavour November 30 on the STS-97 mission to deliver the first huge U.S. solar arrays to the ISS.

The crew for that flight - Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Joe Tanner, Marc Garneau and Carlos Noriega - spent several hours aboard Endeavour today conducting a simulated countdown for their planned liftoff in three weeks.

Before beginning his sleep period, Shepherd told flight controllers that the ISS was "beginning to feel like home". Tomorrow, the crew will mark the completion of its first week on board the expanding facility.

The ISS continues to operate in excellent shape at an altitude of 237 statute miles.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Joe Tanner, Marc Garneau and Carlos Noriega rocketed away from Launch Pad 39-B at 9:06 p.m. Central time, lighting up the central Florida skies as they began their pursuit of the international complex.

At the time of launch, the three Expedition One crew members aboard the ISS were asleep with the facility passing over the southeast portion of the Indian Ocean, 7,500 nautical miles ahead of Endeavour. They are scheduled to be awakened at 12:06 a.m. on Friday with the main focus of their workday being the undocking of the Progress supply vehicle at 10:20 a.m. CST. The Progress will be placed in a parking orbit some 2500 kilometers from the ISS during the STS-97 mission. Mission managers will be discussing whether or not to redock the Progress to the ISS late in December over the next several weeks.

Less than nine minutes after liftoff, Endeavour's astronauts went to work to prepare the shuttle's systems for their planned 11-day mission. The first major task on the flight plan was to open Endeavour's cargo bay doors prior to receiving a "go" for orbital operations from Ascent Flight Director Wayne Hale. The astronauts are expected to set up computers and flight deck gear before beginning an eight-hour sleep period at 2:06 a.m. Central time. The crew will be awakened at 10:06 a.m. Friday morning to begin its first full day in space.

With this evening's successful launch behind them, Endeavour's astronauts will turn their attention to their chase of the International Space Station, performing several firings of the ship's jet thrusters over the next two days to set up a docking with the outpost on Saturday just before 2 p.m. Central time. Over the ensuing week, the crew will perform three space walks as they install the 90-foot high, 240-foot wide solar array structure.

The payload bay of Endeavour for STS-97 contained a total cargo of 18740 kg:

• Bay 1-2:
  • Orbiter Docking System 1800 kg
  • 3 EMU spacesuits (S/N unknown) 360 kg
  • FPPU experiment (in airlock) 23 kg. The FPPU (Floating Potential Probe Experiment) was installed on P6 to measure charge build-up as the arrays pass through the ionosphere plasma. P6 had devices to bleed off excess charge, and FPPU would monitor their effectiveness.
  • APCU Assembly Power Converter Unit 35 kg
  • APCU Assembly Power Converter Unit 35 kg
• Bay 3-6:
  • ITS P6 Long Spacer 4000 kg
  • TCS radiator (aft) 500 kg
  • TCS radiator (starboard) 500 kg
• Bay 8-11:
  • ITS P6 Integrated Equipment Assembly 7200 kg
  • PV radiator P6 500 kg
• Bay 12-13:
  • ITS P6 Photovoltaic Array/Beta Gimbal Assembly. 1000 kg
  • Solar array wing 2B 1070 kg
  • Solar array wing 4B 1070 kg
• Bay 13S: IMAX Cargo Bay Camera 238 kg
• Sill: Canadarm RMS 303 410 kg

Currently flying approximately 8,000 statute miles (12,875 kilometers) behind and below the ISS, Endeavour's crew will spend much of today preparing for Saturday afternoon's docking with the station.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Joe Tanner, Marc Garneau and Carlos Noriega will begin checking out the systems they will use to deliver the station's first set of U.S. solar arrays. They will check out the Shuttle's robotic arm and space vision system to ensure they are working properly, and inspect the spacesuits and tools that Tanner and Noriega will use over the course of three scheduled space walks.

Jett and Bloomfield will execute rendezvous burns about 12:41 p.m., and 9:15 p.m. to bring Endeavour into the proper alignment with the ISS and close the gap between the two spacecraft, still half a world away from each other. The first burn went flawlessly a little before 1 a.m. Friday.

Aboard the space station, Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev continued preparations for the arrival of Endeavour's crew, undocking a Progress supply ship from the Zarya module to make room for Endeavour at a nearby Unity module docking port. The supply ship - now full of refuse and packing materials from the crew's first month on orbit - was undocked at 10:20 a.m. CST and moved to a parking orbit some 2,500 kilometers (1,554 miles) away. Over the next several weeks, Mission managers will be discussing whether or not to redock the Progress to the ISS late in December.

Endeavour's docking with the station remains on schedule for 2 p.m. CST Saturday. After Garneau and Bloomfield use the Shuttle's robot arm to attach the new solar arrays to the connecting framework delivered on STS-92, Noriega and Tanner will conduct three space walks making connections and helping activate the new sun-tracking, power generating panels of the 90-foot tall, 240-foot wide solar array structure.

The crew's first full day in orbit began with a wake-up call from Mission Control at 10:06 a.m. Friday to the sounds of "Stardust" by Willie Nelson, played for Canadian Space Agency astronaut Garneau.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Joe Tanner, Marc Garneau and Carlos Noriega checked out systems they will use to deliver the station's first set of U.S. solar arrays. They tested the power supply to the huge solar array structure. Tanner and Noriega also checked the spacesuits they will use during three space walks, on Sunday, Tuesday and Thursday.

Garneau and Bloomfield tested the shuttle's robotic arm, performing a survey of the payload bay using cameras attached to the arm, and checked out the Space Vision System, a computerized visual system that helps the arm operator determine distance and relative orientation of space station elements during assembly activities.

Jett and Bloomfield fired Endeavour's orbital maneuvering systems twice Friday, at about 12:41 p.m. and 9:24 p.m., to bring the orbiter into the proper alignment with the space station and close the gap between the two spacecraft. Endeavour is about 2,515 miles from the space station and now closing at a rate of almost 400 miles every orbit.

No problems were reported aboard Endeavour as the shuttle sails toward a docking with the ISS at 1:59 p.m. Central time Saturday.

On the International Space Station, Expedition One Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev, continued preparations for the arrival of Endeavour. Their unmanned Progress resupply vessel was undocked at 10:23 a.m. Central time Friday to clear a path for Endeavour's arrival. The Progress will be left in a parking orbit well away from the ISS during Endeavour's visit, allowing flight controllers in Moscow and Houston the option of redocking it to the station after Endeavour departs.

The Expedition One crew went to bed about 3:30 p.m. and will be awakened at midnight to continue preparations to welcome the Endeavour astronauts. The space station crew's wake-up call comes at the same time Endeavour's crew begins an abbreviated seven-hour sleep period. Endeavour's astronauts will awaken shortly after 7 a.m. Central time Saturday to begin their rendezvous procedures.

Commander Brent Jett and Pilot Mike Bloomfield will begin the final stage of rendezvous activities about 8:30 a.m., when they start setting up the aft flight deck controls. Endeavour will approach the station from below to line up with the Earth-facing docking port of the Unity module and avoid disturbing the station and its solar arrays with thruster jet debris. A maneuvering jet firing is scheduled for 10 a.m., with the Shuttle's rendezvous radar system beginning to provide supplemental navigation information about 10:50 a.m. The final burn, called the terminal initiation or Ti burn, will occur at 11:33 a.m.

On the International Space Station, Expedition One Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev, will monitor Endeavour's approach and docking, communicating with the shuttle using air-to-air radio signals.

When Endeavour is about 2,000 feet away, almost directly below and behind the International Space Station, Jett will take manual control of the approach, and with the help of crew members operating computer tracking programs and hand-held laser distance measuring devices, guide the Shuttle to a point about 500 feet below the station. At this point, he will rotate Endeavour 180 degrees into a "tail forward" attitude for the final approach and docking. Jett will pause Endeavour's approach at a distance of 30 feet before moving in for docking just before 2 p.m. CST.

Solar arrays on the Zarya and Zvezda modules will be repositioned by flight controllers in Moscow to minimize structural loads as the two spacecraft come together at the newly installed Unity docking port called Pressurized Mating Adapter-3. Both the station and Endeavour will turn off their attitude control systems and drift freely as the Shuttle docking system pulls the two space vehicles together and forms a rigid bond, or "hard dock." Then, the solar arrays will begin tracking the sun again and Endeavour's steering jets will take over attitude control of the station.

About 3 p.m. today, Mission Specialist Marc Garneau will use the Shuttle's robot arm to lift the P-6 solar array out of its payload bay moorings and park it above the bay so that its temperature can begin equalizing with that of the station. Meanwhile, Mission Specialists Joe Tanner and Carlos Noriega will open the hatches and enter the Unity module's docking vestibule, where they will install electrical grounding straps and leave supplies for the station crew to retrieve later.

The Expedition 1 crew will go to bed about 3:30 p.m., and the Endeavour crew will follow suit at 11:36 p.m.

With Expedition One crew members Bill Shepherd, Yuri Gidzenko and Sergei Krikalev looking on, Commander Brent Jett guided the shuttle to a smooth linkup with the ISS as the two craft sailed 230 statute miles above northeast Kazakhstan. Endeavour is attached to a new station docking port installed last month by the STS-92 astronauts.

The ISS residents went to sleep a short time after docking, to be awakened just after midnight for their 32nd day aboard the station. The station and shuttle crews are maintaining separate sleep cycles to match the work they need to accomplish during their week of joint activities.

A little over two hours after docking, Canadian Space Agency astronaut Marc Garneau maneuvered Endeavour's Canadian-built robot arm and grappled the 45-foot-long, 17 ½ ton P6 solar array truss structure at 4:17 p.m., lifting it out of its berthing latches in the shuttle's cargo bay a few minutes later. Garneau tilted the truss structure 30-degrees to the cargo bay, where it will remain overnight attached to the arm to properly warm its components. The P6 will be mated to the Z1 external truss atop the Unity module Sunday by Garneau with the assistance of space walkers Joe Tanner and Carlos Noriega during their 6½-hour excursion outside Endeavour.

After leak checks were completed between the two vehicles, and with Pilot Mike Bloomfield looking on, Tanner and Noriega made their way through Endeavour's docking tunnel and opened the hatch to the ISS docking port to leave supplies and computer hardware on the doorstep of the station. The hatch refused to open at first because of a slight pressure differential between Endeavour and the ISS, but Tanner used a little muscle to finally push it free. Shepherd and his crewmates are scheduled to enter the Unity module for the first time Sunday morning and will open their hatch to the docking adapter to retrieve the items left behind by their shuttle counterparts. The two crews will not greet each other face-to-face until Friday morning when the hatches are open between the two spacecraft following completion of the space walks.

Once the P6 is mated to the Z1 truss, the solar arrays tower will be commanded to unfurl, increasing the power supply to the ISS by five times its current output. The space walk by Tanner and Noriega is scheduled to begin at about 12:30 p.m. Sunday, but could start as much as 45 minutes earlier if they complete preparations ahead of schedule.

Endeavour's astronauts were set to begin an eight-hour sleep period at about 11:30 tonight and will be awakened at 7:36 a.m. Sunday.

The Endeavour-ISS complex is orbiting the Earth at an altitude of 235 statute miles with all systems operating in excellent fashion.

The structure housing the arrays and associated electronics was mated to the station's Z1 truss structure at 1:32 p.m. - about an hour into the first of three planned space walks during the mission by Joe Tanner and Carlos Noriega. The space walk began at 12:35 p.m. Sunday and ended at 8:08 p.m., lasting 7 hours, 33 minutes. Thus far, astronauts and cosmonauts have spent 77 hours, 7 minutes on 11 space walks for space station assembly.

Using the shuttle's robot arm, Canadian astronaut Marc Garneau moved the P6 solar array structure into position above the Z1 truss structure of the Unity module and drove it home to its installation point about 1:32 p.m. Tanner and Noriega secured bolts on each of the four corners of the array assembly before Garneau released it from the arm.

Pilot Mike Bloomfield took over arm operations and moved Noriega around the array as he connected nine power, command and data cables. At the same time, Tanner released the two solar array blanket boxes. They put the blanket boxes into the ready to deploy position. But computer commands to release the pins holding the blanket boxes closed initially were not successful. Tanner and Noriega stood by in case they were needed to release the pins manually.

Soon afterward, the commands were repeated, the pins on the starboard blanket boxes released and that solar wing was deployed. However, one pin on the portside blanket box remained in the closed position. After the space walk, Commander Brent Jett again sent computer commands for the blanket box pins to close and then reopen, and this time, a little after 8:20 p.m., indicators showed all the pins had disengaged. Flight controllers will not deploy the port wing tonight to allow time to understand whether the solar wing that has deployed is properly tensioned. That wing was functioning well and sending electrical power to the P6 structure's systems.

There is no rush to deploy the port wing and flight controllers want to fully understand the situation with the starboard wing before they attempt to do so.

"We did accomplish our No. 1 mission objective, which was to deliver P6 to the International Space Station," said Bill Reeves, lead shuttle flight director. And "We accomplished all the EVA objectives." One of three Photovoltaic Radiator was deployed at 10:20 Sunday night before the crew began its planned sleep period at about 11:30. The radiator will dissipate heat generated by on-board electronics.

Endeavour and the space station are orbiting at an altitude of about 235 statute miles with systems aboard both spacecraft functioning well. The Endeavour crew will have a day off Monday, while the space station crew will be awakened about midnight to begin its workday. Hatches allowing the two crews to meet face to face will not be opened until Friday, the day after the last scheduled space walk of the STS-97 mission.

Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev entered the Unity module for the first time since their arrival aboard the station 33 days ago at 3:38 a.m. CST Sunday, and retrieved items that were left in the docking compartment by Endeavour's crew after their 2 p.m. Saturday docking. The items included a new laptop computer and headsets for the station's two-way videoteleconferencing system, a new hard drive for a Russian laptop, large bags full of water, packaged Russian and fresh American food items -- plus a special care package.

Shepherd voiced special pleasure at receiving some fresh coffee and a large pair of vice grip pliers. He announced that the Expedition 1 crew would be taking a coffee break as soon as it completed the transfer of the items into the Russian living quarters and resealing the hatch into the Unity module, and added that the new pliers should come in handy for assembly and maintenance work.

Although the Expedition 1 crew came within one hatch of its colleagues - Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Carlos Noriega and Joe Tanner -- the two crews will not greet each other face-to-face until Friday morning following completion of three planned space walks to install and activate the new 17-ton solar array tower.

The first space walk by Tanner and Noriega is scheduled to begin about 12:30 p.m. Sunday, but could start 45 minutes earlier if they complete preparations ahead of schedule. Using the shuttle's robot arm, Garneau is scheduled to move the new solar array into position above the Z1 truss structure of the Unity module about 10:21 a.m. CST, and drive it home to its installation point about 1:06 p.m. Tanner and Noriega will secure bolts on each of the four corners of the array assembly before Garneau releases the arm's grip. Bloomfield will take over arm operations and maneuver Noriega around the array so he can connect nine power, command and data cables. At the same time, Tanner will release the two Solar Array Blanket Boxes, and then he and Noriega will release the two Solar Array Wing launch restraints. The two space walkers will put the blanket boxes into the ready to deploy position, and free the folding mast before cleaning up and moving back into the shuttle about 7:16 p.m. CST. Jett will send the command to deploy the ISS Solar Arrays at 5:11 p.m. CST. The Solar Array Photovoltaic Radiator is scheduled for its deployment a little over 3 hours later at 8:36 p.m.

With the International Space Station complex orbiting the Earth at an altitude of 235 statute miles in fine fashion, the Endeavour crew received a wake-up call at 7:36 a.m. CST. The Expedition 1 crew goes to bed at 3:36 p.m.

Endeavour's astronauts and flight controllers on the ground are working towards deployment of the second solar panel on the newly installed U.S. solar array structure later today. The current plan calls for the second array to be extended starting about 3:51 p.m. CST.

Today's deployment sequence will be a modified version from the one used yesterday. The port array will be deployed this afternoon using a multi-step process. The movement of the array will be stopped several times during deployment to allow motion in the solar blankets to dampen out before continuing with the extension. Sunday's deployment of the starboard array was done in one continuous motion, lasting about 13 minutes while today's stop and start procedure is expected to take at least one hour to complete.

Flight controllers are also looking at any procedures that may be undertaken to increase the tension in the already deployed array. Imagery taken of the starboard solar pannel shows a little bit of slack in some of the support wires. The array itself is working well and generating power to the array's batteries. The main concern with the tension level on the deployed array is making sure that it is stable enough to support dynamic activities such as Shuttle dockings and undockings as well as when the station is maneuvered to a new attitude position on-orbit.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Joe Tanner, Carlos Noriega and Marc Garneau of the Canadian Space Agency, were awakened just after 8:30 a.m. today to begin their day. This morning's wake up song was "Lovin' You Lots & Lots" from the movie "That Thing You Do" and was sent up to Bloomfield from his wife.

In addition to monitoring the second array deployment, the crew's activities today will include some housekeeping chores and monitoring orbiter systems along with a photo survey of the solar array structure using cameras on the Shuttle's mechanical arm.

The STS-97 crew will take a few minutes this afternoon to talk with reporters from the Cable News Network, CBS News and ABC News about how their mission has been progressing. The trio of interviews is scheduled to begin at 2:31 p.m. CST.

The Endeavour crew will begin a planned 8-hour sleep period at 11:06 p.m. before they are awakened at 7:06 a.m. CST Tuesday to begin preparations for the second of three planned space walks outside the International Space Station. The main objective of the second space walk will be to install data and power cables to allow the space station to utilize electricity generated by the new solar arrays.

Deployment of the port wing was delayed while ground controllers studied an apparent slackness in one of two blankets that make up the starboard structure. They believe that two tensioning cables had jumped off their guides during deployment. Despite that anomaly, the starboard array is functioning well and producing electricity. The slackness should have no effect on its ability to produce power for the space station.

Deployment of the second solar wing brings to 240 feet the span of the station's solar arrays. This array is 38 feet across and can produce as much as 60 kilowatts. It has a 15-year designed lifetime. It is the first of four such arrays that eventually will supply power to the station, enabling it to conduct basic and applied research in its microgravity environment.

The deployment was scheduled to begin with Endeavour and the space station in daylight and with television available so that array experts could watch the deployment from Mission Control. The port wing began to move from the two boxes that housed its two solar blankets and the mast canister between them that housed the lattice structure that pushed their ends outward, after a computer command by Endeavour commander Brent Jett. The deployment was slow, with stops and starts. It was completed, after two rows of solar panels stuck together were shaken lose by slightly retracting, then extending the arrays again, at 8:46 p.m.

Jett and the other four astronauts aboard, pilot Mike Bloomfield and mission specialists Joe Tanner, Carlos Noriega and Canadian Marc Garneau, had a relatively quiet day Monday. They conducted an extensive camera survey of the starboard array before deployment of its twin began. They also did housekeeping chores and monitored Endeavour systems before their scheduled sleep period beginning about 11 p.m.

Aboard the space station, the Expedition One crew, commander Bill Shepherd and cosmonauts Yuri Gidzenko and Sergei Krikalev, continued their work to outfit the ISS. After a wakeup tone at midnight - about the time the Endeavour crew went to bed -- the station crew installed a dust collector fan, collected condensate water samples, replaced a microprocessor and made observations of Patagonian glaciers. They will meet face-to-face with Endeavour crewmembers on Friday, after all three spacewalks by Tanner and Noriega have been completed.

The second of those spacewalks is scheduled for Tuesday. Its main purpose is to install data and power cables to allow the space station to use electricity generated by the new solar arrays.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Carlos Noriega, Joe Tanner and Marc Garneau were awakened at 7:06 a.m. CST Tuesday. The crew started its day with the University of Southern California's fight song, "Fight On," played for graduate Noriega.

Tanner and Noriega are scheduled to begin their six-hour space walk at 11:56 a.m. CST, or a little earlier if they are ready. The main objective is to reconfigure electrical connections so that power from the newly installed P6 solar arrays can flow to the U.S. elements of the station.

After the second set of solar array blankets was successfully deployed Monday, all of the new power-generating unit's batteries - six on each side for a total of 12 - have been fully charged and are ready to send electricity to the Unity module.

Noriega will work on the port side of the truss structure, moving cables from one connector to another to transfer power, and then removing a thermal shroud from a power conditioner. Tanner will remove a similar shroud from a signal processor and prepare to relocate the S-Band Antenna Subassembly from the Z1 truss, where it was temporarily stowed by the STS-92 crew in October.

The space walkers will be looking down on the space station from high above when they move the dish-shaped, high-data-rate antenna. Inside the shuttle, Bloomfield will maneuver the robot arm as far as it will reach up the truss structure, then Tanner and Noriega will alternate possession in a series of "leap frog" exchanges until the antenna assembly is installed on the Integrated Equipment Assembly. While there, they will take care of an added task - "eye-balling" the take-up reels on the starboard solar array's tension cables. During Sunday's deployment, the cables apparently slipped off the reels. Engineers on the ground are considering whether to attempt to tighten the cables manually on the third planned space walk Thursday.

Inside the station, Expedition 1 Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev will enter the Unity module for the second time and in their 35 days aboard the station and reconfigure power cables there to accept the newfound source of electricity. They are expected to be inside Unity for about an hour.

The remaining EVA tasks are designed to pave the way for the arrival of the U.S. Laboratory Destiny early next year. Tanner and Noriega will remove umbilicals from Pressurized Mating Adapter-2, connecting them to a dummy panel on that docking port and preparing it for relocation to the end of the Destiny module, which will be connected to Unity on the STS-98/5A mission.

Carlos Noriega and Joe Tanner began their space walk at 11:21 a.m. Before moving on to the cable connections, they surveyed the starboard solar wing to better understand the condition of the tensioning system that extends one of its two solar array blankets. Engineers, flight controllers and managers continue to develop possible plans for Noriega and Tanner to further tension that blanket on the third space walk, scheduled for Thursday.

During their 6 hour, 37 minute space walk, Noriega and Tanner moved the S-band antenna assembly to the top of the solar array tower. They also released restraints holding a radiator to the tower's side. It is designed to help cool Destiny. That radiator was deployed after the space walk.

Destiny is scheduled to be launched to the space station Jan. 18. The docking port, Pressurized Mating Adapter 2, will be moved temporarily from its spot at the forward end of the Unity module, where the laboratory will be attached. The docking port then will be placed on the forward end of Destiny.

Endeavour Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialist Mark Garneau supported the space walk. Inside the space station, the Expedition One crew, Commander Bill Shepherd and cosmonauts Yuri Gidzenko and Sergei Krikalev, went into Unity for the second time in their 35 days aboard the station. There they reconfigured cables to route electricity from the new solar arrays to the rest of the space station.

The work kept the station crew members up past their scheduled 3:36 p.m. bedtime. Endeavour's crew was scheduled to begin its sleep period about 10:30 p.m., and are scheduled to be awakened at 6:36 a.m. on Wednesday.

The second space walk brings this crew's total to 14 hours and 10 minutes outside the space station, and total space walk time outside the station for all flights to 83 hours and 44 minutes.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Joe Tanner and Carlos Noriega were roused at 6:36 a.m. by a Puccini opera aria, " O Mio Babbino Caro," intended especially for Garneau.

Soon after this morning's wake-up call, Noriega and Tanner received word they will have an additional task on their Thursday space walk. Station and shuttle engineers and managers sent up plans for adjusting the tension levels of the solar blankets on the starboard solar array. The plan calls for the shuttle crew to retract the array's mast two to three feet to generate some slack in the tension cables. Noriega will pull the slack through each spring-loaded take-up reel, then Tanner will manually "wind" the tension reels. When each has reached its limit, Tanner will let it unwind by spring force while Noriega guides the cable on to the reel grooves. The outboard reel will be first, followed by the inboard reel.

The new solar arrays and electrical system continue to work well, generating power that has now been routed all the way to the Russian space station modules. Tuesday's space walk and associated internal work by Expedition 1 Commander Bill Shepherd, Sergei Krikalev and Yuri Gidzenko enabled all of the interfaces needed to send power to the Zarya and Zvezda modules. By about 9 a.m. CST today, flight controllers had configured the American-to-Russian Converter Units so that an additional 3 kilowatts of electricity is available to the Russian modules. This brought the total power available to Zvezda up to about 6 to 7 kilowatts; once enabled, the Zarya module will have up to 5.5 to 7 kilowatts available.

Wednesday, Shepherd went back inside the Unity module about 4:30 a.m. CST to install electrical outlets inside Unity and separate the power feeds going to the early communication and S-band communication systems, providing additional redundancy.

Although Shepherd was scheduled to leave the hatch between the Russian elements and the Unity module open today, it may be closed about 10:30 a.m. to manage rising humidity levels caused by a failure in Zvezda's air conditioning system. Krikalev and Gidzenko are working a maintenance and repair procedure on both the air conditioning system and Vozdukh carbon dioxide removal system.

Space walk preparations focused on techniques to tighten one of two solar blankets on the starboard wing. They got the word that task had been added to the space walk schedule shortly after they were awakened about 6:30 a.m. They reviewed the procedures during a conference with flight controllers later in the day.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau will support Tanner and Noriega from the Endeavor's crew compartment, retracting by two or three feet the mast extending the two blankets of the starboard wing.

Once the mast is shortened, Noriega will pull the slack in the tensioning cables through each spring-loaded take-up reel. Tanner will manually "wind" the spring-loaded tension reels. When each has reached its limit, Tanner will let it unwind by spring force while Noriega guides the cable on to the reel grooves. The outboard reel will be done first, followed by the inboard reel. The cables apparently came out of the grooves when the wing was extended on Sunday. Both wings of the 240-foot-long, 38-foot-wide array continue to function well, producing power to the space station.

After the solar wing repair, Tanner and Noriega will install the Floating Potential Probe atop the P6 structure. It measures the electrical potential of plasma around the station.

Expedition One Commander Bill Shepherd and cosmonauts Sergei Krikalev and Yuri Gidzenko had a busy day aboard the space station. They installed a new air conditioning unit brought up by the Progress supply vessel which docked with the station Nov. 17 to replace one that had failed earlier in the week. The new unit is functioning well. The crew also replaced a malfunctioning fan in the Vozdukh carbon dioxide removal unit, bringing that life-support unit back on line.

Shepherd went back inside the Unity module about 4:30 a.m. Wednesday to install electrical outlets and air ducts and separate the power feeds going to the early communication and S-band communication systems, providing additional redundancy.

Endeavour's crew was scheduled to go to bed a little after 10 p.m., about two hours before the space station crew was to be awakened at 12:06 a.m. Thursday. The wake-up call for the STS-97 crew will sound at 6:06 a.m.

After carefully going through the plan with Mission Control on Wednesday and receiving descriptions and videotapes of fellow Astronaut David Wolf performing the additional task on the ground, Commander Brent Jett and his crew voiced optimism they could accomplish the new task.

Mission Specialists Joe Tanner and Carlos Noriega will float out the shuttle's hatch at 10:51 a.m. CST and move up to the top of the new solar array truss structure. Jett, Pilot Mike Bloomfield and Mission Specialist Marc Garneau will retract the mast extending the two blankets of the starboard solar array wing approximately two or three feet. Once the mast is shortened, Noriega will pull the slack in the tensioning cables through each take-up reel. Tanner will manually turn the spring-loaded tension reel until it reaches its limit and then will let the reel unwind by spring force while Noriega guides the cable onto the reel grooves. The outboard reel will be done first, followed by the inboard reel.

The 240-foot-long, 38-foot-wide solar array continues to function well, sending power to the International Space Station. The starboard array's cables apparently came out of the reel grooves when the wing was extended on Sunday. The port solar array wings were deployed to their full tension Monday using a modified deployment technique.

After the solar wing repair, Tanner and Noriega will install the Floating Potential Probe atop the P6 structure. The probe will measure the electrical potential of plasma around the station. Plasma Contactor Units already are at work on the solar array truss, emitting electrons that complete an electrical circuit and avoid the potential for arcing.

Expedition One Commander Bill Shepherd and cosmonauts Sergei Krikalev and Yuri Gidzenko awoke just after midnight CST and continued packing up items that will be returned to Earth aboard Endeavour. They also set up, but did not activate, a wireless instrumentation system that will attempt to measure and further model the structural integrity of the station as shuttle steering jets fire.

Humidity levels are coming down in the station after Wednesday's successful installation by the crew of a new air conditioning unit. The crew also replaced a malfunctioning fan in the Vozdukh carbon dioxide removal unit, bringing that life-support unit back on line. The hatch between the Zarya and Unity modules remains open indefinitely. The two crews are scheduled to meet inside Unity about 8:30 a.m. Friday.

Endeavour's crew was awakened at 6:06 a.m. CST to the sounds of the Beatles' "Here Comes the Sun," sent up for Joe Tanner. The station crew is scheduled to go to bed at 3:36 p.m. CST, and the shuttle crew will begin its sleep shift at 10:06 p.m.

"We had a great day," Glenda Laws, lead EVA officer, said at an evening briefing.

Space walkers Joe Tanner and Carlos Noriega also installed a centerline camera cable outside the Unity module. It will transmit television images to help a shuttle crew attach the U.S. laboratory Destiny next month. The last of their scheduled tasks was installation of the Floating Potential Probe. The FPP, atop the P6, measures the electrical potential of plasma around the station. The evergreen tree image was on a transfer bag they attached to the FPP symbolizing "topping out" of the space station - a tradition followed by Earth-based construction workers when a building reaches its final height.

The blanket tensioning task had been quickly and carefully planned. On Wednesday Mission Control sent up to Endeavour descriptions of the task and video of fellow Astronaut David Wolf performing the solar blanket work on the ground.

The space walk began at 10:13 a.m., more than 35 minutes earlier than planned. After the space walkers moved to the top of the P6, crew members inside Endeavour, Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialist Marc Garneau retracted the mast extending the starboard wing, which had been deployed Sunday, by two or three feet. Noriega pulled the slack tensioning cables through each take-up reel. Tanner turned the spring-loaded tension reels, then let them unwind while Noriega guided the cable onto the reel grooves, tensioning the slack blanket. The 240-foot-long, 38-foot-wide solar array continues to function well.

The scheduled activities went so smoothly that Tanner and Noriega were able to complete some "get-ahead" tasks for the next scheduled space walks outside the space station in January. These included installing a sensor on a radiator, installing small antennas and doing a photo survey. Even so, they were able to conclude their space walk at 3:23 p.m., after 5 hours and 10 minutes outside. This brings total space walk time during STS-97 to 19 hours and 20 minutes, and total space walk time outside the station to 88 hours and 54 minutes.

The space station's crew, Commander Bill Shepherd and cosmonauts Sergei Krikalev and Yuri Gidzenko, packaged items for transfer to Endeavour and return to Earth. Their scheduled sleep period began a little after 3:30 p.m. They were to be awakened at 12:06 a.m. Friday. Endeavour's crew was scheduled to go to bed a little after 10 p.m. and be awakened at 6:06 a.m. Friday.

The two crews will meet face to face, for the first time since Endeavour docked to the space station last Saturday, a little after 8:30 a.m. Friday.

The crews of the International Space Station and Space Shuttle Endeavour opened the last hatch separating them at 8:36 a.m. Space station commander Bill Shepherd and cosmonauts Yuri Gidzenko and Sergei Krikalev greeted the Endeavour astronauts, Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Carlos Noriega and Joe Tanner, with handshakes.

The two crews had remained separated because the pressure aboard Endeavour had been reduced to help prepare Tanner and Noriega for their space walks.

The solar arrays they helped get ready for deployment and later repaired are functioning well. Systems aboard the space station are working well and Endeavour is performing almost perfectly.

"It has been a great mission," lead shuttle flight director Bill Reeves said at a Friday briefing. All objectives already have been accomplished, he said, except for the fly around of the space station by Endeavour after the Saturday undocking.

The eight crew members worked together to transfer equipment and supplies between the two spacecraft, and take refuse from the station aboard Endeavour for return to Earth. They did structural tests of the station and its solar arrays. They also finished setting up and checking out a TV system. Tanner and Noriega installed a cable for that system Thursday during their third space walk. The system will help a shuttle crew attach the U.S. laboratory Destiny to the station during a January mission.

Both crews held a news conference beginning at 3:57 p.m. Friday. They spoke live with reporters at Johnson Space Center in Houston, at Kennedy Space Center in Florida and at Canadian Space Agency headquarters near Montreal. Immediately afterwards they talked with the Discovery Channel.

The space station crew was scheduled to go to bed about 6 p.m. and wake up at 2:36 a.m. on Saturday. The shuttle crew will begin its sleep period about 10 p.m. and be awakened at 6:06 a.m. Saturday. Endeavour is scheduled to undock from the space station at 1:13 p.m. Saturday and, after the flyaround of the ISS, begin final separation at 2:17 p.m.

The crew of the Space Shuttle Endeavour and the station's Expedition 1 crew opened the hatches of their respective spacecraft at 8:36 a.m. CST Friday. Station Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev shook hands with their first station guests in 38 days -- STS-97 Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Carlos Noriega and Joe Tanner.

The meeting was the first face-to-face contact between the crews, even though their spacecraft have been docked together since last Saturday, orbiting the planet at an altitude of 230 statute miles. At least one hatch remained closed at all times to maintain different atmospheric pressures so that the shuttle crew could conduct three spacewalks and succeed in its primary mission objectives, the delivery, installation and activation of the first U.S. solar power system for the International Space Station.

The new solar arrays are working well, converting the Sun's rays into electricity and providing an average of 13 kilowatts of additional energy for use by the space station, supplementing the power supplied by solar arrays on the Russian Zarya and Zvezda modules. Other station systems, including a carbon-dioxide removal system and an air conditioner that failed earlier in the week but were repaired by the station crew, are working well.

After a short welcoming ceremony and safety briefing, the eight spacefarers got right to work conducting joint activities including structural tests of the station and its solar arrays, transfer of equipment, supplies and refuse back and forth between their two spacecraft and checking out a television camera cable that will help the next shuttle crew deliver and install the station's first laboratory module, Destiny.

A joint crew news conference is scheduled for 3:57 p.m. CST today.

The space station crew is scheduled to go to bed about 6 p.m. CST, and the shuttle crew a little later about 10 p.m.

Bob Cabana, ISS manager for International Operations, said at a Saturday afternoon briefing after Endeavour's undocking that the ISS is "a fully functional space station that is growing by leaps and bounds." Endeavour left the P6 solar array structure on the station, with wings stretching 240 feet from tip to tip. It can provide as much as 60 kilowatts of power under ideal conditions.

The shuttle and the space station closed the last hatch linking them at 9:51 a.m. Undocking took place as scheduled, at 1:13 p.m. The shuttle and space station had been docked to one another for 6 days, 23 hours and 13 minutes. Endeavour moved downward from the space station, then began a tail-first circle at a distance of about 500 feet. The maneuver, with pilot Mike Bloomfield at the controls, took about an hour.

While Endeavour flew that circle, the two spacecraft, moving at five miles a second, flew about two-thirds of the way around the Earth. Undocking took place 235 statute miles above the border of Kazakhstan and China. When Endeavour made its final separation burn, the orbiter and the space station were near the northeastern coast of South America.

Shortly after undocking, Expedition One commander Bill Shepherd radioed a "well done Endeavour" to commander Brent Jett, Bloomfield and mission specialists Marc Garneau, Joe Tanner and Carlos Noriega. Jett radioed the station crew best wishes for the rest of its mission. Shepherd and cosmonauts Yuri Gidzenko and Sergei Krikalev will spend about three more months aboard the space station.

Late in the day, Canadian astronaut Garneau talked with John Manley, Canadian minister of foreign affairs and international trade, Mac Evans, Canadian Space Agency president, and elementary school children at the Museum of Science and Technology in Ottawa.

Before going to bed at 10:06 p.m. the STS-97 crew got some off-duty time and adjusted the shuttle's orbit to give it an additional landing opportunity in Florida. Endeavour is to touch down at 5:04 p.m. CST Monday at Kennedy Space Center.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Joe Tanner and Carlos Noriega left behind Expedition 1 Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev, who still have three more months of space station living ahead of them.

Before closing the hatches over the northern portion of the Persian Gulf, the two crews completed final transfers of supplies being delivered to the station and used equipment along with other items that were removed from the station for return to Earth.

Endeavour and the STS-97 crew will perform a full fly-around of the station before firing the shuttle's thrusters to leave the vicinity of the station 240 statute miles above the Earth and begin heading for home.

The crew's wake-up call today was "Back in the Saddle Again," by Gene Autry in honor of Bloomfield, who is making his second space flight and his second fly-around of a space station. The first was STS-86, on which he steered Atlantis around the Russian Space Station Mir.

Canadian astronaut Garneau is scheduled to talk with John Manley, Canadian minister of foreign affairs and international trade, Mac Evans, Canadian Space Agency president, and elementary school children at the Museum of Science and Technology in Ottawa at 5:26 p.m. CST.

Before going to bed at 10:06 p.m. CST, the STS-97 crew will enjoy some off-duty time and adjust the shuttle's orbit to enable additional landing opportunities in Florida. Landing is scheduled for 5:04 p.m. CST Monday at Kennedy Space Center.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Carlos Noriega and Joe Tanner were awakened at 6:06 a.m. CST, as Endeavour led the station on orbit by about 530 nautical miles.

Aboard the station, Expedition 1 Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev had been awake since midnight, enjoying a light-duty day of housekeeping and communications passes with friends and family members.

Endeavour's morning wake-up music was "Beyond the Sea," sung by Bobby Darin -- a reference to the traditions observed on the station by Navy Commander Jett and Navy Captain Shepherd, including the ringing of the station's ship's bell when the shuttle crew departed Saturday.

Today, Jett and Bloomfield will check out the systems that will be used for landing. A test of the aerodynamic control surfaces they will use to steer Endeavour like a glider through the atmosphere is set for 10:06 a.m. CST. A hot-firing of the reaction control system jets they will use to guide the shuttle out of orbit is set for 11:16 a.m.

After lunch, Jett, Tanner and Noriega will talk with reporters at the Associated Press, and the Telemundo and Univision Networks at 2:51 p.m. CST. The entire crew then will stow away the gear that was used on the space station assembly mission.

Endeavour is scheduled to touch down at 5:04 p.m. CST Monday at Kennedy Space Center.

The weather forecast for the anticipated landing time at Kennedy Space Center calls for a slight chance of showers in the area, and flight controllers will continue to monitor the weather conditions in Florida tomorrow. Landing opportunities are available at Edwards Air Force Base in California as well on Monday, and flight controllers could opt to send Endeavour there if conditions warrant. The weather at Edwards is predicted to be favorable.

There are two landing opportunities on Monday at Kennedy Space Center. The second is at 6:41 p.m. Edwards has three opportunities. The first is at 6:35 p.m. CST, the second at 8:09 p.m. and the third at 9:46 p.m.

Endeavour's five crew members, Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Carlos Noriega and Joe Tanner, were awakened at 6:06 a.m. They checked out the flight control surfaces - the rudder and flaps that will control Endeavour after it enters the atmosphere. They also checked out the reaction control system thrusters that will keep the orbiter in the proper attitude as it begins its fiery re-entry.

Jett, Tanner and Noriega talked with reporters from the Associated Press and the Telemundo and Univision networks a little before 3 p.m. Sunday, before focusing on their stowage tasks. Endeavour's crew was scheduled to begin its sleep period just after 10 p.m. and to be awakened at 6:06 a.m. Monday to begin landing-day activities.

Aboard the station, now about 1,250 miles behind Endeavour, Expedition 1 Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev were awakened at midnight. They had a light day, doing housekeeping tasks and speaking with family and friends via radio. Their scheduled sleep period began about 3:30 p.m.

Commander Brent Jett guided Endeavour to a landing at 5:03 p.m. Central time, 36 minutes after sunset, wrapping up a 4,476,164 million mile (7,203,687 kilometers) mission that saw three space walks conducted to install, checkout and activate the first of four planned sets of solar arrays that will operate on the facility. Jett and his crewmates, Pilot Mike Bloomfield and Mission Specialists Marc Garneau, Joe Tanner and Carlos Noriega touched down on Runway 15 at the Florida spaceport to wrap up the fifth and final shuttle flight of the year, heralding their arrival with an early evening twin sonic boom as the shuttle went subsonic just minutes before reaching its landing strip.

It was the 16th night landing in shuttle program history.

Four minutes before landing, the International Space station flew almost directly over Kennedy Space Center, with the Expedition One crew of Bill Shepherd, Yuri Gidzenko and Sergei Krikalev asleep, having completed their 41st day in space and their 39th day aboard the international outpost. They are due to be awakened just after midnight Central time to begin a day highlighted by the reconfiguration of systems to accept the new supply of power from the huge solar wings on the station.

The five crew members are scheduled to be reunited with their families within a few hours of landing and will spend the night near the Kennedy Space Center to relax. The crew is scheduled to return to Houston and a welcoming ceremony at Ellington Field about 4 p.m. Central time Tuesday.

With Endeavour's landing, the stage is set for the next shuttle flight of Atlantis in about five and a half weeks to deliver the U.S. Laboratory "Destiny" to the International Space Station, the cornerstone of scientific research on the growing complex.

Commander Brent Jett, Pilot Mike Bloomfield and Mission Specialists Carlos Noriega, Marc Garneau and Joe Tanner will move into their formal de-orbit preparation timeline about noon. For the first landing opportunity of the day, Entry Flight Director LeRoy Cain would give the crew a "go / no go" call on closing Endeavour's payload bay doors about 1 p.m.

There are two landing opportunities in Florida today, the first beginning with an orbital maneuvering system engine firing at 3:57 p.m. CST, and culminating in a landing on Shuttle Landing Facility runway 15 at 5:04 p.m. CST (6:04 p.m. EST). In the event weather precludes a landing on that first opportunity, a second landing opportunity exists one orbit later with a de-orbit burn at 5:35 p.m. CST, resulting in a 6:40 p.m. (7:40 p.m. EST) landing at the Kennedy Space Center. If that second opportunity is selected, residents along the Gulf of Mexico may have a good view of Endeavour's plasma trail as it blazes through the atmosphere on its way home to Florida.

Preliminary weather forecasts, while basically favorable for landing, call for a slight chance of showers in the vicinity of the Shuttle Landing Facility today. Landing opportunities also are available at Edwards Air Force Base in California, and flight controllers could decide to send Endeavour there if conditions warrant. Edwards has three landing opportunities at 6:35 p.m., 8:09 p.m. and 9:46 p.m. CST.

Aboard the International Space Station, now about 1,500 miles behind Endeavour, Expedition 1 Commander Bill Shepherd, Pilot Yuri Gidzenko and Flight Engineer Sergei Krikalev are taking advantage of the additional space offered by the Unity module.

With additional power provided by the station's new solar arrays -- delivered and installed by Endeavour's crew - the station crew now has continuous access to that module. Early this morning, Shepherd provided flight controllers with views of a cluttered module, and asked for the crew to have time for some housekeeping on Tuesday. Shepherd indicated he had elected to spend much of Monday setting up a new resistance exercise device in Unity, and looked forward to opening the hatch in the docking port vacated by Endeavour so that it can be used as closet space.

• Bay 1-2: Orbiter Docking System - 1800 kg + 3 EMU spacesuits - 360 kg
• Bay 4-13: S0 Truss - 12623 kg. The S0 truss, built by Boeing/Huntington Beach, was 13.4 m long and 4.6 m in diameter. The main truss had a hexagonal cross section. One face carried fluid, power and data cables, while another face carried the rails for the Mobile Transporter. The S0 contained avionics, GPS antennae, and a radiation dose monitor. The S0 would be attached to the LCA (Lab Cradle Assembly) which was attached to the top of the Destiny lab module in 2001. Attached to S0 were:
  • 4 x MTS (Module to Truss Structure) struts. These were used to connect it to the Destiny module
  • Airlock Spur. This was a 4.2 m beam that hinged out to connect to the Quest module and had handrails for spacewalkers
  • Mobile Transporter (MT). This was made by TRW Astro Aerospace in Carpinteria and was an 885 kg, 2.7 m long truck which moved on the S0 rails to transfer heavy cargo along the truss.
• Sill: RMS arm - 410 kg
• Total: 15193 kg

Commander Mike Bloomfield, Pilot Steve Frick, Flight Engineer Ellen Ochoa and spacewalkers Steve Smith, Rex Walheim, Jerry Ross and Lee Morin rocketed away from Launch Pad 39-B at the Kennedy Space Center at 3:44 p.m. Central time as the ISS orbited over the Atlantic Ocean due east of the northeastern United States at an altitude of 240 statute miles.

Launch occurred with only 12 seconds left in the 5-minute launch window due to a brief delay caused by a momentary ground launch system software glitch at the Launch Control Center at the Florida spaceport which paused the countdown at the T-minus 5-minute mark. Once the problem was solved, the countdown resumed.

Atlantis' launch marked a milestone as Ross became the first human to fly in space seven times, breaking a record of six flights previously held by Ross and fellow American astronauts John Young, Story Musgrave, Franklin Chang-Diaz and Curt Brown. No Russian cosmonaut has flown in space more than five times.

Now in their fifth month in orbit, Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch were able to watch Atlantis' launch through a video uplink from flight controllers in Houston. Atlantis' arrival will mark the first visitors for the Expedition Four crewmembers since their launch back in December.

Less than nine minutes later, Atlantis and its crewmembers settled into orbit as work began to prepare the shuttle for its planned 11-day mission and for a series of rendezvous maneuvers to reach the station on Wednesday morning. Atlantis will actually have to lap the ISS as a result of those maneuvers before its scheduled docking with the outpost Wednesday.

After Atlantis' payload bay doors are opened and approval is given for the start of orbital operations, the seven crewmembers will unstow computers and other gear required for the mission.

If all goes as planned, Atlantis will link up to the station Wednesday just after 11 a.m. Central time, setting the stage for the installation of the S0 (S-Zero) Truss on Thursday morning on the Destiny Laboratory and the first of four spacewalks to mate and activate the new component to Destiny. The S-Zero Truss will serve as a platform upon which other trusses will be attached and additional solar arrays will be mounted in future assembly flights to form a structure longer than the length of a football field. The new truss will also serve as a primary electrical switching station to route power from the stations' arrays to various modules and components.

The shuttle crew will begin its first sleep period at 8:44 p.m. Central time and will be awakened at 4:44 Tuesday morning to begin its first full day in orbit, designed to test the ship's robot arm, spacesuits and rendezvous equipment which will be used over the next few days.

With docking scheduled at 11:06 a.m. Central time (1606 GMT) tomorrow, Commander Mike Bloomfield, Pilot Steve Frick and Mission Specialists Rex Walheim, Ellen Ochoa, Lee Morin, Jerry Ross and Steve Smith verified all of Atlantis' equipment, setting the stage for the orbiter's linkup to a docking port at the forward end of the station's Destiny Laboratory.

Docking is planned over south central China, southwest of Shanghai. The crew will be up early Wednesday to complete preparations and to execute a number of engine firings to draw Atlantis close to the ISS for its eventual docking.

Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch tidied up their orbital home and completed routine maintenance on the eve of the arrival of their first visitors since they were launched to the ISS back in December. After docking and hatch opening tomorrow, the two crews will run through a dress rehearsal of procedures which will be used on Thursday to maneuver the large S0 (S-Zero) Truss structure from Atlantis' cargo bay for mating to a capture device at the top of Destiny.

Four spacewalks will be conducted by two teams of spacewalkers to electrically and structurally connect the new truss to the ISS. The 13 and a half-ton S-Zero is the mainframe for a series of trusses to follow which will expand the station to a length of a football field.

Late today, Bloomfield and Frick executed a rendezvous maneuver by firing Atlantis' reaction control system jets to refine the shuttle's path to the space station. Several larger engine firings will be conducted Wednesday morning to slow Atlantis' approach to the station, setting up its final path for linkup to the ISS.

With all of its systems functioning in excellent shape, Atlantis orbits the Earth at an altitude of around 220 statute miles. The crew began an eight-hour sleep period at 7:44 Central time this evening and will be awakened at 3:44 Wednesday morning.

The crew will spend today testing and preparing shuttle equipment that will be used to rendezvous and dock with the complex and to install the first and central station truss segment delivered by Atlantis. The crew will power up and test the shuttle's robotic arm, check spacesuits, set up television cameras for the rendezvous activities and prepare the shuttle docking mechanism for contact with the station at 11:06 a.m. Wednesday. Atlantis' mission is to install the 44-foot-long S-Zero (S0) truss on the station, a central girder segment that is one of the most complex pieces of the International Space Station ever launched. The segment is filled with electrical, computer and cooling connections as well as navigation and robotics equipment, including a space railway.

Commander Mike Bloomfield, Pilot Steve Frick, and mission specialists Ellen Ochoa, Steve Smith, Rex Walheim, Jerry Ross and Lee Morin were awakened at 4:44 a.m. to the song "The Best Years of Our Lives" performed by the Baha Men.

Ochoa and Ross, who has now flown in space more times - seven - than any other astronaut, will take a break from the their work onboard Atlantis about 10:44 a.m. CDT for interviews by two Indianapolis, IN, television stations and the Associated Press. Ross is an Indiana native. Late this afternoon, Atlantis' orbital maneuvering system engines will be fired to adjust the rate at which the shuttle is closing in on the station and maintain its course toward a Wednesday morning docking.

On board the station, the Expedition 4 crew, Commander Yury Onufrienko and flight engineers Carl Walz and Dan Bursch, also awoke at 3:44 a.m. to an alarm-clock-like tone. They have synchronized their sleep schedule to match that of the Atlantis crew to prepare for docked operations.

About two hours after Atlantis docks to the station, the hatches between the two spacecraft will open and Onufrienko, Bursch and Walz will greet their first visitors since beginning their stay aboard the orbiting laboratory last December. After a welcome and safety briefing, all 10 astronauts and cosmonauts will begin transferring equipment and supplies between the two vehicles.

Both crews will jointly review plans for installation of the S-Zero (S0) Truss, including procedures for Thursday's scheduled spacewalk, the first of four during this mission. Ochoa and Bursh will maneuver the station's robotic arm, Canadarm2, through a rehearsal of the motions it will use Thursday to pluck the 44-foot, 27,000 pound truss segment from the shuttle's cargo bay and install it atop the station's U.S. laboratory Destiny.

Major systems aboard Atlantis and the space station continue to function well.

Commander Mike Bloomfield guided Atlantis to a linkup with the forward docking port of the station's Destiny Laboratory at 11:05 a.m. Central time as the two vehicles sailed at an altitude of 240 statute miles. The docking culminated a textbook rendezvous executed by Bloomfield and Pilot Steve Frick. As Atlantis docked, Expedition Four Flight Engineer Dan Bursch, a Navy Captain, rang the ISS ship's bell to greet the arriving shuttle crew.

About two hours later, at 1:07 p.m. Central time as the two craft flew over New Zealand, hatches swung open between Atlantis and the station, and the ten crew members greeted one another inside Destiny, marking the arrival of the first visitors for Expedition Four Commander Yury Onufrienko, Flight Engineer Carl Walz and Bursch since they entered the ISS in December for the start of their six-month mission.

After a safety briefing for the shuttle astronauts by Onufrienko, the two crews began to transfer gear for the first spacewalk tomorrow by Steve Smith and Rex Walheim as well as experiments to be housed in Destiny.

Ellen Ochoa joined Bursch to brush up on procedures for the use of the station's Canadarm2 robotic arm tomorrow which will be employed to grapple and unberth the 13 1/2 ton S0 (S-Zero) Truss from Atlantis' cargo bay for mating to a capture device at the top of Destiny. Smith, Walheim, Jerry Ross and Lee Morin will conduct four spacewalks to electrically and structurally mate the S-Zero to Destiny over the next week. Ochoa maneuvered the arm and verified it is in good working order to support the S-Zero operations on Thursday.

Smith and Walheim set up all the equipment in the Quest Airlock on the ISS from which they will mount the first of the four spacewalks to deploy two of the four mounting struts to Destiny and to bring power to the new truss from the U.S. Laboratory. Ochoa is scheduled to grapple the S-Zero around 5 a.m. Central time with the first spacewalk set to get underway around 10 a.m.

Atlantis and the ISS are in excellent shape, orbiting the Earth every ninety minutes in an orbit inclined 51.6 degrees to either side of the Equator.

The two crews began an eight-hour sleep period at 7:44 Central time this evening and will be awakened at 3:44 Thursday morning for the fourth day of the mission.

On Friday, April 12, NASA Administrator Sean O'Keefe will deliver an address on future agency policy entitled, "Pioneering the Future", originating from Syracuse University. The address will be seen on NASA Television beginning at 1 p.m. Central time.

The Atlantis crew - Commander Mike Bloomfield, Pilot Steve Frick and mission specialists Rex Walheim, Ellen Ochoa, Lee Morin, Jerry Ross and Steve Smith - was awakened at 3:44 a.m. by the University of California-Berkeley fight song performed by the school band and "All Right Now," performed by the Stanford University band. Ochoa requested the songs be played for crewmates Walheim and Smith who attended the rival schools.

On board the station, the Expedition 4 crew, Commander Yury Onufrienko and flight engineers Carl Walz and Dan Bursch, also awoke at 3:44 a.m. to an alarm-clock-like tone. Both crews are ready to support the addition of the new segment to the station.

Ochoa, assisted by Bursch, will command the space station robotic arm, Canadarm2, to grapple S0 about 5 a.m. Canadarm2 will lift the truss segment out and away from Atlantis' cargo bay and temporarily install it on the U.S. laboratory Destiny. The Lab Cradle Assembly will provide a semi-rigid structural hold until the truss segment is permanently attached during four spacewalks this week.

The first spacewalk is set to begin about 10 a.m. today as Smith, wearing the suit with solid red stripes, and Walheim, in a solid white suit, float out of the station's Quest airlock. After initial setup procedures, their tasks during the 6½ hour venture include attaching two of four S0 mounting struts to Destiny, as well as an avionics tray that contains power, data and fluid cables and an umbilical system connected to the Mobile Transporter. If time permits, Smith will remove a launch support beam and also go inside the truss to install two circuit breakers.

Ochoa and Bursch will move Walheim on Canadarm2 to worksites throughout the spacewalk. Bloomfield and Frick will use the shuttle's robotic arm cameras to take video of the spacewalkers while Ross guides them through the outlined procedures.

During the S-Zero installation, Atlantis Commander Mike Bloomfield and Pilot Steve Frick operated the shuttle's robotic arm to provide additional camera views to Ochoa and Bursch, who were working in the Destiny Lab at one of the robotic workstations. The truss will serve as the backbone for future station expansion to the length of a football field. S-Zero contains navigational devices, computers, cooling and power systems necessary to attach additional laboratories to the complex.

Within minutes after the new truss was temporarily latched to the Destiny Lab, mission specialists Rex Walheim and Steve Smith left the station's Quest Airlock at 9:36 a.m. Central time to begin the first of four spacewalks of the mission to electrically and structurally mate S-Zero to the station.

Smith and Walheim first unfurled and firmly attached two of four mounting struts on the truss to Destiny before deploying trays of avionics equipment and cables on the truss which include power, data and fluid lines connecting Destiny to the S-Zero. They also attached an umbilical system from the truss to the Mobile Transporter housed on the forward face of the huge girder. The umbilical will enable the Transporter, which is the first railcar in space, to move up and down the length of the station to position the ISS robotic arm for future assembly work. Two other struts on the truss will be mated to Destiny Saturday during the second spacewalk, permanently bolting the truss to the Laboratory.

Working deliberately to connect all of the critical power connections, Walheim spent the day working at the end of the station's Canadarm2, the first time the large arm has been used as a form of cherry picker to maneuver astronauts during assembly work at the ISS. Smith operated as a so-called "free-floater", tethered to the station and to various work sites around the truss itself. Atlantis astronaut Jerry Ross and ISS Flight Engineer Carl Walz took turns choreographing the spacewalk from the aft flight deck of the shuttle.

With all but two tasks successfully completed, Smith and Walheim returned to Quest late this afternoon and ended their spacewalk at 5:24 p.m. Central time, completing a 7 hour, 48 minute excursion. It was the 35th spacewalk devoted to station assembly and the 10th staged from the station itself. As Smith and Walheim wrapped up their work, flight controllers reported that the activation of the S-Zero Truss had begun and that all of the initial systems appear to be in excellent shape.

Time ran out before Smith and Walheim could install two circuit breakers on the truss, but that task will be picked up on a subsequent spacewalk.

After a long and tedious day, the shuttle and station crew members were scheduled to begin an eight-hour sleep period at 7:44 p.m. Central time and will be awakened just before 4 a.m. Friday.

The Atlantis crew - Commander Mike Bloomfield, Pilot Steve Frick, and mission specialists Ellen Ochoa, Rex Walheim, Lee Morin, Jerry Ross and Steve Smith - was awakened at 3:44 a.m. Central time by the song "Testify to Love," by Wynonna Judd played for Bloomfield from his family. On board the station, the Expedition 4 crew, Commander Yury Onufrienko and flight engineers Carl Walz and Dan Bursch, awoke about 30 minutes later.

Morin and Ross will move an experimental plant growth chamber to a rack inside the station's Destiny lab. This experiment will replace a protein crystal growth experiment that will return to Earth on board Atlantis. Walheim and Ochoa will install a freezer in the lab for future crystal samples.

Oxygen and nitrogen will be transferred from Atlantis to the station to refill the airlock high-pressure tanks with the gasses breathed by spacewalkers. The crew will also prepare for and review the procedures for the next two spacewalks, on Saturday and Sunday, to continue hookup of the S0 Truss.

Systems on the S0 Truss are functioning well after its installation Thursday. Friday, ground controllers will activate the Global Positioning System and the Rate Gyro Assembly located on S0 that will begin providing navigation and attitude data for the station.

Crewmembers will take a break to talk with reporters from MSNBC, CBS Radio Network and WWJ-TV in Detroit at 11:28 a.m. At 1 p.m. NASA television will switch to live coverage of NASA Administrator Sean O'Keefe's address on "Pioneering the Future." The address will be replayed on NASA TV at 3 p.m.

After two hours of time off during the afternoon, both crews are scheduled to begin their sleep period at 7:44 p.m.

Atlantis Commander Mike Bloomfield, Pilot Steve Frick, and Mission Specialists Ellen Ochoa, Rex Walheim, Lee Morin, Jerry Ross and Steve Smith - and the Expedition Four crew - Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch - spent their day transferring equipment and science experiments between the shuttle and the station. They also transferred oxygen from the shuttle to one of four high-pressure gas tanks on the Quest Airlock. The tanks are used to repressurize the airlock at the end of each spacewalk staged from the module.

Station flight controllers reported that four new computers on the S-Zero truss were tested successfully, as were new devices to determine the station's orientation relative to the Earth, Global Positioning System navigational antennas and the Thermal Control System for the 13 ½ ton girder, which will be the backbone for other trusses and solar array towers to be mounted on the station in the next year.

The two crews transferred a number of experiments from Atlantis to the station's Destiny Laboratory and reviewed plans for the second and third spacewalks of the mission Saturday and Sunday to continue the outfitting of the new truss.

Saturday's spacewalk by Ross and Morin is scheduled to begin around 9:30 a.m. Central time. The two spacewalkers will complete the bolting of two aft struts on the truss to Destiny, forming a secure structural mate between S-Zero and the Laboratory. Ross and Morin will also attach a second umbilical system to the truss' Mobile Transporter, a form of rail car that will eventually move the station's robotic arm some 350 feet up and down the entire length of the completed truss.

The two crews enjoyed some off duty time this afternoon and are scheduled to begin their sleep period at 7:44 p.m. Both crews will be awakened Saturday at 3:44 a.m.

Dubbed the "Silver Team" by their colleagues because of their age, 54-year old Jerry Ross and 49-year old Lee Morin of Atlantis' crew had little trouble extending and bolting the final two struts of the new S-Zero (S0) truss to the Destiny Laboratory, insuring that the centerpiece for the future expansion of the station would be permanently secured to accept additional trusses and solar array towers over the next year. The station will ultimately span some 350 feet from end to end, the length of a football field.

The first two struts of the truss were mated to Destiny on Thursday by the other Atlantis spacewalking team, Steve Smith and Rex Walheim, who will venture back outside Sunday to continue the outfitting of the truss and to reroute electrical power to the station's 58-foot long robotic arm.

Morin worked at the end of the ISS' Canadarm 2 throughout the day during his first spacewalk, while Ross, America's most experienced spacewalker and the most flown space traveler in history, remained tethered to the station to provide "free-floating" support during the eighth spacewalk of his career.

Smith, Walheim and Expedition Four Flight Engineer Dan Bursch helped choreograph the spacewalk from Atlantis' aft flight deck, while shuttle crew member Ellen Ochoa and station Flight Engineer Carl Walz took turns maneuvering Morin as they operated Canadarm2 from a robotic work station inside Destiny.

Shuttle and station Commanders Mike Bloomfield and Yury Onufrienko and shuttle Pilot Steve Frick provided photographic and television support for the spacewalk, the 36th devoted to ISS assembly over the past 3 ½ years.

After the truss struts were bolted in space, Ross and Morin removed a series of panels and clamps that provided structural support for the truss during its launch in Atlantis' cargo bay.

The spacewalkers then began work to install a backup device containing an umbilical reel for the Mobile Transporter railcar on the truss that will provide redundancy to a similar device mounted on the truss Thursday. The two sets of umbilicals for the Mobile Transporter, which is designed to move the robotic arm up and down the length of the completed station truss, provide power, data and video capability for the system, which will be tested for the first time in orbit Monday.

Ross tried to remove a restraining bolt on the mechanism which, if required, can cut the umbilical cable should it snag during its operation, but the bolt proved to be a bit balky and did not back out of its socket as planned. Flight controllers decided not to spend additional time troubleshooting the stubborn bolt today after engineers determined that the cable cutter cannot inadvertently fire in its current configuration. The backup umbilical system is operating normally and the stubborn bolt will be dealt with on one of the mission's two remaining spacewalks. The primary umbilical system installed Thursday is also operating normally.

The spacewalk, which was conducted out of the station's Quest Airlock, began at 9:09 a.m. Central time and concluded at 4:39 p.m. as Ross and Morin repressurized the outer compartment of the two-chamber module.

Late today, Frick fired Atlantis' steering jets in a one-hour procedure to slowly reboost the space station by about 2 statute miles. It was the first of three scheduled reboost maneuvers to eventually raise the orbit of the ISS by about 6 statute miles before Atlantis departs the station on Wednesday.

The ten shuttle and station crew members are scheduled to begin their eight-hour sleep period at 7:44 p.m. and will awaken Sunday just before 4 a.m. to begin preparations for the third spacewalk of the flight.

The Atlantis crew - Commander Mike Bloomfield, Pilot Steve Frick, and mission specialists Ellen Ochoa, Rex Walheim, Steve Smith, Morin and Ross - was awakened at 3:44 a.m. by the song "Voodoo Chile," by Jimi Hendrix. It was played for Morin, who will be making his first spacewalk, at the request of his wife. On board the station, the Expedition 4 crew, Commander Yury Onufrienko and flight engineers Carl Walz and Dan Bursch, also were awakened at 3:44 a.m.

During their 6½-hour spacewalk Ross, wearing a spacesuit with broken red stripes, and Morin, wearing a spacesuit with diagonal broken stripes, will complete the structural attachment of S0's remaining two struts to the station's Destiny laboratory. With all four of the struts attached to Destiny, S0 will be able to support its design loads, including the solar arrays that will be on the ends of the truss at assembly complete.

After attaching the struts, Ross and Morin will remove the large metal rods used to support S0 during launch and store them on the truss. The pair will also attach a second cable system to the Mobile Transporter, which will eventually enable the space station's robotic arm, Canadarm2, to ride a railway along the truss structure.

For today's spacewalk Morin will be working from a platform at the end of the Canadarm2, operated by Ochoa. Using the shuttle robotic arm cameras, Bloomfield and Frick will take photographs and video of the spacewalkers. Walheim will coordinate the spacewalk from inside.

Both crews are scheduled to begin their eight-hour sleep period at 7:44 p.m.

They are scheduled to step out of the station's Quest airlock at 9:34 a.m. Their first task is to release a claw atop the lab that temporarily secured the truss to it during the initial installation. Walheim, wearing a solid white spacesuit, will release the latch as Smith, wearing a spacesuit with red stripes, begins making connections to route power, data, and video through the truss for later operation of the space station robotic arm, Canadarm2. During the 6½-hour spacewalk, Smith will be working from a platform on the station arm, operated by Mission Specialist Ellen Ochoa and Flight Engineer Dan Bursch.

Walheim will install circuit breakers in the truss, a task left over from the first spacewalk, which lasted 7½ hours. Together they will then turn their attention to the Mobile Transporter, spending about 45 minutes releasing its many launch restraints and removing a small thermal cover from a radiator on the railcar. Then they return to work on the electrical connections for about another hour and a half.

After transferring tools and testing sensors on the side of S0, the last task will be to install the Airlock Spur. The 14-foot beam, fitted with handrails, will stretch from Quest to the forward side of S0, helping future spacewalkers work more efficiently.

Inside the shuttle/station complex, Mission Specialists Lee Morin and Jerry Ross will coach the spacewalkers through the outlined tasks. Shuttle Commander Mike Bloomfield and Pilot Steve Frick will provide photographic and video support during the spacewalk, using Atlantis' robotic arm.

Atlantis' crew was awakened about 3:52 a.m. by the song "All Star," performed by Smash Mouth from the Shrek movie soundtrack. The song was played for Walheim by his family.

Onboard the space station, Expedition Four Commander Yury Onufrienko, Flight Engineer Carl Walz and Bursch were awakened at 3:44 a.m. Both crews are scheduled to begin their sleep period at 7:44 p.m.

The stage is now set for the inaugural run Monday of the so-called Mobile Transporter, a flatcar designed to transport the space station's robotic arm up and down an integrated truss system that will span the length of a football field.

Within minutes after starting their spacewalk at 8:48 a.m. Central time, Steve Smith and Rex Walheim released a claw-like device on the top of the Destiny Laboratory to which the new 13 ½ ton S-Zero (S0) truss was initially attached on Thursday. With the truss' four large struts now securely bolted to Destiny, the claw was no longer needed.

Smith and Walheim then reconfigured a number of connectors providing electricity to the 58-foot-long Canadarm2 robotic arm on the station so it can be powered from the S-Zero truss rather than Destiny. The arm has two sets, or "strings" of avionics equipment for its operation. As Smith and Walheim worked deliberately, one set of avionics was rewired and tested, followed by a separate set of redundant avionics.

Smith spent most of the day riding at the end of the shuttle's robotic arm, which was operated by Pilot Steve Frick during the rewiring of its companion station arm. Walheim was the so-called "free-floating" astronaut, tethered to the station to assist Smith. It was the seventh spacewalk of Smith's career. He is the second most experienced U.S. spacewalker behind crewmate Jerry Ross, who helped choreograph today's excursion from inside Atlantis with the help of Lee Morin. It was Walheim's second spacewalk.

With Canadarm2 successfully rewired and both of its electrical, data and video circuit sets checked out, Smith and Walheim pressed ahead to release clamps which secured the Mobile Transporter to the S-Zero truss during its launch last week. The railcar, which weighs about 1900 pounds, will be commanded Monday by ground controllers to move about 32 feet up and down the truss at a glacial speed of a little less than one inch per second in the first test of its computers, drive motors, suspension unit, video and data umbilicals and the first section of rails on the S-Zero.

The railcar, and an associated Mobile Base System device to be installed on the transporter in early June on the next shuttle assembly flight to the ISS, will ultimately enable the robotic arm to travel to various worksites on the expanding trusses of the station for future construction. The Mobile Base System will be the platform upon which the Canadarm2 will attach itself to be driven up and down the length of the ISS.

The only task not completed today was the attachment of a 14-foot ladder called the Airlock Spur from the S-Zero truss to the Quest Airlock designed to simplify the path for future spacewalkers moving back and forth from the truss to the airlock itself.

As the spacewalk neared its completion, final diagnostic tests of the newly wired station arm were taking longer than planned, and because the Canadarm2 is required for the airlock ladder to be pivoted away from the truss to Quest, flight controllers decided to defer its installation until the final spacewalk on Tuesday.

Smith and Walheim finally returned to Quest and completed their spacewalk at 3:15 p.m. Central time with the repressurization of the airlock.

Atlantis astronaut Ellen Ochoa and ISS Expedition Four crew member Dan Bursch backed up Frick in the operation of the shuttle's robot arm during today's spacewalk, the 37th devoted to space station assembly. Commander Mike Bloomfield documented the spacewalk from Atlantis' aft flight deck while Expedition Four Commander Yury Onufrienko and Flight Engineer Carl Walz continued to transfer supplies from the shuttle to the station for future use.

Late today, Frick conducted an hour-long reboost of the ISS, using Atlantis' steering jets to move the station higher by about two statute miles. It was the second of three planned maneuvers to raise the station's altitude and the second in as many days.

The ten crew members are scheduled to begin an eight-hour sleep period at 7:44 p.m. Central time tonight and will be awakened just before 4 a.m. to prepare for the testing of the new Mobile Transporter.

Ground controllers in mission control will command the Mobile Transporter to move up and down the truss three times, testing its computers, drive motors, suspension unit, video and data umbilicals, and the railway itself. The railcar will travel a total of about 71 feet at speeds of 1, 0.4 and 0.1 of an inch per second, stopping at future worksites to test its ability to latch and unlatch itself to the railway.

This is the first time that a software-controlled movable robot has been used on an orbiting vehicle. The Mobile Transporter software controls about 20 motors, directing it to travel from one point to another, latch itself down to the truss, and plug itself into a power source. The Mobile Transporter ultimately will move the station's robotic arm, Canadarm2, along the orbiting laboratory's 356-foot Integrated Truss.

The Atlantis crew - Commander Mike Bloomfield, Pilot Steve Frick, Mission Specialists Ellen Ochoa, Rex Walheim, Lee Morin, Jerry Ross and Steve Smith - was awakened at 3:48 a.m. to "Magic Carpet Ride" by Steppenwolf, dedicated to Smith. The station crew - Commander Yury Onufrienko, Flight Engineers Carl Walz and Dan Bursch - was awakened at 4:14 a.m.

The crews will continue to transfer equipment between the two spacecraft and will review procedures for the fourth and final spacewalk of the mission, scheduled for Tuesday.

The 10 crewmembers will participate in a news conference with media representatives at NASA centers in Florida and Houston and at Mission Control- Moscow. The event will be carried live on NASA television beginning at 11:47 a.m. CDT. Afterwards, the crews will have a few hours off. Both crews are scheduled to begin their eight-hour sleep period at 7:44 p.m.

Expedition Four Flight Engineer Carl Walz sent commands from a laptop computer to the Mobile Transporter to move off of its launch position on the forward face of the new S-Zero (S0) truss, and at 7:22 a.m., the flatcar began its slow trek to an initial worksite 17 feet down a rail which spans the entire 44 feet of the girder.

It took only a half hour to traverse the distance, but sensitive software in the transporter prevented an automatic latching of the railcar to the worksite. Ground controllers accomplished the latching through a methodical series of commands.

Engineers believe that the subtle effects of weightlessness are causing the railcar to "lift" off its tracks by a microscopic distance, thus interfering with magnetic sensors that tell the transporter its position relative to each worksite. The effect is that the sensors are losing contact with magnetic positioning strips on the truss rail, preventing an automatic latching of the transporter. Manual commanding of the latching is working however, and the system is said to be in excellent working order.

The Mobile Transporter software controls about 20 motors, directing it to travel from one point to another, latch itself down to the truss, and plug itself into a power source. The transporter must latch with about three tons of force to insure a stable platform for the eventual mounting of the Canadarm2 robotic arm. On the next shuttle assembly flight to the ISS in June, a platform called the Mobile Base System will be mounted to the transporter upon which Canadarm 2 will eventually be attached so it can travel the length of a football field to support future assembly of station components.

Late today, the transporter traveled to a second worksite where manual latching commands were again required, then inched back to the first worksite, where the railcar was parked at 5:40 p.m. Central time and manually latched in place for a final time to await the arrival of the Mobile Base System component on the STS-111 mission. In all, the transporter traveled 72 feet from worksite to worksite at a glacial pace of about one inch per second.

Engineers believe a minor software modification may restore the transporter's ability to automatically latch itself to any worksite. All other transporter systems functioned perfectly throughout its initial test.

Atlantis Commander Mike Bloomfield, Pilot Steve Frick, Mission Specialists Ellen Ochoa, Rex Walheim, Lee Morin, Jerry Ross and Steve Smith, and Expedition Four Commander Yury Onufrienko and Flight Engineers Walz and Dan Bursch spent the day monitoring the transporter tests and continued the transfer of equipment and supplies from Atlantis to the station.

In addition, about 100 pounds of oxygen and 30 pounds of nitrogen have been transferred from Atlantis to the tanks on the Quest Airlock to support future spacewalk activity.

The fourth and final spacewalk of the flight will be conducted on Tuesday by Ross and Morin beginning around 9:30 a.m. Central time. At the start of the planned 6 ½ hour excursion, Ross and Morin will pivot a 14-foot ladder away from the S-Zero truss for attachment to Quest to act as a pathway for future spacewalkers. They will also install external lights on the Unity module, test microswitches on the sides of the S-Zero truss which will be used to confirm the attachment of future truss segments, troubleshoot a balky bolt on a cable cutting system on the Mobile Transporter and tie down a portion of insulation on one of four navigational antennas on the S-Zero.

The ten Shuttle and Station crew members are scheduled to begin an eight-hour sleep period at 7:44 p.m. Central time and will be awakened shortly before 4 a.m. Tuesday to prepare for the final spacewalk of the mission.

Ross and Morin began the fourth and final spacewalk of the STS-110 mission and the 38th devoted to space station construction at 9:29 a.m. Central time, first pivoting a 14-foot beam called the Airlock Spur from the S-Zero truss to the Quest Airlock to provide a quick pathway for future spacewalkers working on truss assembly.

Ross then conducted tests of switches on both sides of the 44-foot long truss to insure they will work properly later this year in confirming the attachment of additional truss segments to the S-Zero. The main truss of the ISS will eventually stretch more than 350 feet, longer than a football field.

The two spacewalking grandfathers pressed ahead to install floodlights on the station's Unity connecting module and the Destiny Laboratory which will provide illumination for future spacewalkers as they move around the expanding outpost.

Ross and Morin then affixed a work platform on the station for future construction work, installed electrical converters and circuit breakers, dressed up a piece of insulation around one of the four navigational antennas on the truss and attached shock absorbers to the new Mobile Transporter railcar. The shock absorbers will prevent vibrations to the station's robotic arm from the future use of carts on the truss which will be used to move spacewalkers from one end of the station to another.

The only tasks not accomplished were the removal of a balky bolt from a backup cable cutting device on one of two umbilical systems for the Mobile Transporter, which was successfully tested on Monday and the installation of a gas analyzer on the truss which proved to be faulty.

The bolt will have no impact on the operation of the flatcar, upon which a Mobile Base System platform will be mounted in June as the ultimate base for the transport of the station's robotic arm up and down the length of the ISS. The gas analyzer was considered the lowest priority of the flight.

With all of their major work completed, Ross and Morin returned to the Quest Airlock and concluded the spacewalk at 4:06 p.m. Central time.

Atlantis Mission Specialist Ellen Ochoa and Expedition Four Flight Engineer Dan Bursch operated the station's Canadarm2 robotic arm to move Ross around the ISS during the spacewalk while Morin operated as the "free-floating" spacewalker, tethered to the station to assist Ross in the final tasks of the mission. For Ross, America's most experienced spacewalker, it was his ninth excursion to conduct work in the void of space during his career, totaling 58 hours and 18 minutes of spacewalking time. Only Russian cosmonaut Anatoly Solovyev has performed more spacewalks in human spaceflight history. Today's spacewalk was the second for Morin. Rex Walheim and Expedition Four crew members Carl Walz helped choreograph the spacewalk from Atlantis' aft flight deck.

While the spacewalkers went about their work, Shuttle and Station Commanders Mike Bloomfield and Yury Onufrienko, Pilot Steve Frick, and Steve Smith continued their transfer of equipment to and from both Atlantis and the ISS and provided photographic and television support to Ross and Morin.

With all of the objectives having been successfully accomplished for the mating and outfitting of the S-Zero truss to the ISS, the stage is set for Wednesday's final farewells between the two crews and undocking of Atlantis from the station at 1:31 p.m. Central time as the two craft sail some 244 statute miles above the north Atlantic due west of Ireland. Atlantis is scheduled to land at the Kennedy Space Center early Friday afternoon.

The shuttle crewmembers will begin an eight-hour sleep period tonight at 7:14 p.m. Central time followed thirty minutes later by the station crew. Atlantis' crew will be awakened at 3:14 a.m. Wednesday to prepare for undocking. The station crew will be awakened an hour later.

Work during the 6½-hour spacewalk includes installation a 14-foot beam extending from Quest to the newly installed S-Zero (S0) Truss to help spacewalkers maneuver around the station more efficiently. They will install halogen work lights on the Unity module and the U.S. laboratory, Destiny -- the 40-watt lamps are five times more powerful than standard 40-watt lamps and will shine a 9- by 7-foot elliptical beam of light 20 feet away. The spacewalkers will setup and partially assemble a work platform.

Ross, working from the station's robotic arm, also will install shock absorbers to either side of the Mobile Transporter to provide a barrier and attach point between the railcar and future hand-propelled carts that will be used by spacewalkers.

Morin will deploy an instrument to measure and characterize the radiation environment outside the station. He also will troubleshoot a balky bolt on a redundant cable cutting system on the Mobile Transporter. A successful test run of that railcar concluded late Monday when ground controllers commanded it to latch onto the railway and plug into a power source. The railcar is ready to receive the Mobile Base System during the next shuttle mission, STS-111, giving the station's Canadarm2 points of attachment on the rail-car base capable of moving along the station's Integrated Truss.

Additional tasks include installing handrails on S0, relocating tools for STS-111 spacewalks, adjusting a thermal blanket partly obstructing a GPS antenna on S0, performing photo and video documentation of station components and checking out a gauge that is designed to detect minute amounts of gas in the environment of space.

The Atlantis crew - Commander Mike Bloomfield, Pilot Steve Frick, Mission Specialists Ellen Ochoa, Rex Walheim, Steve Smith, Morin, and Ross- was awakened at 3:44 a.m. to "I Am an American," performed by the Purdue University Marching band. It was dedicated to Purdue graduate Ross. The station crew - Commander Yury Onufrienko, Flight Engineers Carl Walz and Dan Bursch - was also awakened at 3:44 a.m.

After more than a week of joint operations between the shuttle and station crews, Pilot Steve Frick backed Atlantis away to a distance of about 400 feet in front of the outpost, where he began a 1 1/4 lap flyaround of the ISS, newly equipped with the 27,000 pound S-Zero truss, the first segment of a truss structure which will ultimately expand the station to the length of a football field. Aboard the station, Flight Engineer Dan Bursch rang a ship's bell in the Unity module to mark Atlantis' departure in what has become a tradition.

Finally, at 3:15 p.m., as Atlantis flew directly above the station, Frick fired the shuttle's jets one more time in a separation maneuver to depart the station for good.

Left behind on the ISS are Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Bursch, now in their 133rd day in space and their 131st day on board the outpost.

Also left behind on the station were more than a ton of supplies, almost 200 pounds of oxygen and nitrogen for the station's Quest Airlock, 1,463 pounds of water and the new truss, which will serve as a backbone for future station construction and a power switching station for new solar arrays to be delivered to the ISS next year. Atlantis's week-long visit to the ISS was the 13th shuttle mission devoted to station assembly and resupply.

Earlier today, Commander Mike Bloomfield, Frick and Mission Specialists Rex Walheim, Ellen Ochoa, Steve Smith, Lee Morin and Jerry Ross completed final transfers of logistical supplies to the station and bid farewell to their station counterparts in the Destiny Laboratory. Hatches between the station and the shuttle swung shut at 11:04 a.m. Central time and leak checks were performed to insure that all was in order for the undocking.

As Atlantis' crew turns its attention to preparations for landing at the Kennedy Space Center Friday afternoon, the Expedition Four crew will prepare to button up the ISS temporarily and enter its Soyuz return craft early Saturday for a brief flyover from one docking port to another.

With Onufrienko at the controls, the Soyuz will undock from the station's Zarya nadir docking port at around 4 a.m. Central time Saturday, back out to a distance of about 250 feet and redock to the Pirs Docking Compartment 35 minutes later. That will clear the Zarya docking port for the arrival of a new Soyuz return vehicle and a three-man taxi crew on April 27 for a week-long visit.

Both Atlantis and the International Space Station are in excellent shape following their joint mission. Atlantis' astronauts are scheduled to begin an eight-hour sleep period at 6:44 p.m. Central time and will be awakened just before 3 a.m. Thursday for what is expected to be their final full day in orbit.

Farewells and closing of the hatches between the spacecraft is set to begin about 10:30 a.m. About 1:30 p.m., Atlantis astronaut Jerry Ross will send commands to release the docking mechanism. The initial separation will be provided by springs that will gently push the shuttle away from the station. When Atlantis is about two feet away from the station and the docking devices are clear of one another, Pilot Steve Frick will fire Atlantis' steering jets to begin slowly moving away.

About 45 minutes after undocking, when Atlantis is 450 feet away, Frick will fly the shuttle around the station 1¼ times. The flyaround is set to begin at 2:16 p.m. and will last about an hour. Atlantis will move directly over the station, then behind it, underneath it, and back in front, where the flyaround began. The last quarter-circle brings the shuttle directly above the station. Finally, Frick will fire Atlantis' jets to move away from the station about 3:15 p.m. Atlantis is scheduled to land at the Kennedy Space Center at 11:26 a.m. CDT Friday.

Atlantis leaves behind the newly installed S-Zero (S0) Truss, the first part of the main truss that will support cooling and power systems essential for the addition of future international laboratories to the station. All of the S0 systems have been operating well since its attachment to the station's U.S. laboratory Destiny on Thursday.

The shuttle also delivered additional supplies and science experiments for the station crew to work with during its final weeks on the station. The Expedition Four crew - Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch - is scheduled to return to Earth aboard the space shuttle Endeavour in June.

The Atlantis crew - Commander Mike Bloomfield, Frick, Mission Specialists Ellen Ochoa, Rex Walheim, Steve Smith, Lee Morin, and Ross- was awakened at 3:44 a.m. to "Noah," performed by Frick when he was a teen-ager. The station crew was awakened at 4:14 a.m.

The crew - Commander Mike Bloomfield, Pilot Steve Frick, Mission Specialists Ellen Ochoa, Rex Walheim, Lee Morin, Jerry Ross and Steve Smith - was awakened at 2:44 a.m. to "Somewhere Over the Rainbow," performed by Bloomfield's daughter.

Bloomfield, Frick and Ochoa will test fire the reaction control system jets and flight control surfaces that will be used to guide Atlantis through the atmosphere on Friday morning. Atlantis is scheduled to return to the Kennedy Space Center in Florida at 11:26 a.m. CDT Friday where preliminary weather forecasts for landing are favorable.

Crewmembers will take a break from their on orbit work today to talk with media representatives from CNN, WDIV-TV in Detroit and the Fox News Network this morning in an interview beginning at 9:14

Atlantis' orbital maneuvering jets will be fired twice today. Once will be for scientists to look at the exhaust's effects on radar echoes and effects of orbital kinetic energy on the ionosphere. The other firing will reduce the cross range for Friday's backup landing opportunity in Florida. Walheim, Morin, Ross and Smith will continue to pack away equipment and supplies onboard the shuttle and prepare the cabin for landing.

On board the International Space Station the Expedition 4 crew - Commander Yury Onufrienko and Flight Engineers Dan Bursch and Carl Walz - was awakened at 3 a.m. They are preparing for their next visitors, a Soyuz taxi crew slated to arrive April 27. Onufrienko, Walz and Bursch, will board the current Soyuz spacecraft and move it from its location on the Zarya docking port to the Pirs docking compartment on Saturday to make room for the replacement Soyuz.

The crew of Atlantis will begin a scheduled eight-hour sleep period at 6:14 p.m. today, waking just after 2 a.m. Friday to prepare for reentry and landing of Atlantis concluding a successful mission to the station.

Commander Mike Bloomfield, Pilot Steve Frick and Flight Engineer Ellen Ochoa activated one of three hydraulic power units on Atlantis and tested all of the shuttle's aerosurfaces to ensure that Atlantis will have full controllability during its high-speed return to Earth Friday. Bloomfield and Frick then test-fired Atlantis' steering jets, which were declared ready to support entry and landing.

Bloomfield, Frick and Ochoa joined crewmates Rex Walheim, Lee Morin, Jerry Ross and Steve Smith to stow all of the equipment they have used over the past 10 days and parked the shuttle's KU-band dish antenna in preparation for the closing of Atlantis' cargo bay doors early Friday morning.

Atlantis has two landing opportunities at the Kennedy Space Center on Friday. The first begins with the firing of Atlantis' braking rockets at 10:20 a.m. Central time, enabling the shuttle to drop out of orbit for its hour-long descent back to Earth and a touchdown on the 3-mile long Shuttle Landing Facility at KSC at 11:26 a.m. Central time. In the unlikely event weather prevents a landing on the first opportunity, a second opportunity is available for a Florida landing, beginning with the deorbit burn of the orbital maneuvering system engines on Atlantis at 11:59 a.m. Central time, resulting in a landing at KSC at 1:03 p.m. Central time.

The weather forecast calls for very favorable conditions for landing at the Florida spaceport Friday, with only scattered clouds and light winds expected. As a result, the backup landing site at California's Edwards Air Force Base was not called up for support Friday. Atlantis has enough consumables to stay in orbit, if necessary, until Monday.

Meanwhile, on board the ISS, Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch spent a relatively quiet day in the wake of a week of joint operations with Atlantis' crew to install and activate the S-Zero (S0) truss and the Mobile Transporter railcar on the complex. Both of the new components continue to be checked out and are said to be in excellent shape.

Onufrienko, Walz and Bursch will spend part of the day Friday deactivating some of the ISS systems as they prepare to board their Soyuz return vehicle early Saturday for a brief flyover from its current docking location at the nadir port of the Zarya module to the Pirs Docking compartment. The relocation of the Soyuz, which is expected to take about 35 minutes, will begin with undocking Saturday at 4:02 a.m. Central time (902 GMT). Coverage of the operation on NASA Television begins at 3 a.m. Central time (800 GMT).

The movement of the Soyuz 3 vehicle from Zarya to Pirs opens the Zarya port for the arrival of a new Soyuz 4 craft on April 27 by a three-man "taxi" crew comprised of Commander Yuri Gidzenko, formerly of the Expedition One crew, Flight Engineer Roberto Vittori of the European Space Agency and South African spaceflight participant Mark Shuttleworth. They will be launched from the Baikonur Cosmodrome in Kazakhstan on April 25 and will spend about a week in joint operations with the Expedition Four crew before departing from Pirs in the Soyuz 3 craft on the night of May 4.

The crew of Atlantis was scheduled to begin a scheduled eight-hour sleep period at 6:14 p.m. today, and will be awakened just after 2 a.m. Friday to prepare for entry and landing. All shuttle and ISS systems are operating normally.

If Atlantis lands on Friday, the STS-110 astronauts will return home to Ellington Field in Houston near the Johnson Space Center at around 1 p.m. Central time Saturday.

Atlantis has two landing opportunities at KSC today. The first begins with the firing of Atlantis' braking rockets at 10:20 a.m. and a landing at 11:26 a.m. CDT. A second opportunity for a Florida landing would see the deorbit burn at 11:59 a.m. and a landing at KSC at 1:03 p.m. CDT. Forecasts call for favorable weather for landing in Florida Friday, with only scattered clouds expected. The backup-landing site at California's Edwards Air Force Base was not called up today. Atlantis has enough consumables to stay in orbit until Monday.

The crew of Atlantis - Commander Mike Bloomfield, Pilot Steve Frick, and Mission Specialists Ellen Ochoa, Rex Walheim, Lee Morin, Jerry Ross and Steve Smith - was awakened at 2:21 a.m. by the song "Message in a Bottle," performed by The Police.

Meanwhile, aboard the ISS, Expedition 4 Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch monitored station systems this morning during another reboost of the orbiting laboratory. The Progress cargo ship's jets were fired to raise the station's altitude a little more than half a mile. During the STS-110 mission, Atlantis did three station reboosts, totaling about six miles.

The station crew also will deactivate some ISS systems today to prepare to board the Soyuz return vehicle early Saturday for its 35-minute move from the nadir port of the Zarya module to the Pirs Docking compartment. The relocation of the Soyuz will begin with undocking Saturday at 4:02 a.m. Coverage on NASA Television begins at 3 a.m.

The move frees the Zarya port for the arrival of a new Soyuz 4 craft on April 27 with a three-man "taxi" crew comprised of Commander Yuri Gidzenko, Flight Engineer Roberto Vittori of the European Space Agency and South African spaceflight participant Mark Shuttleworth. They will be launched from the Baikonur Cosmodrome in Kazakhstan on April 25 and will spend about a week aboard the station before departing in the Soyuz 3 craft May 4.

Commander Mike Bloomfield eased Atlantis to a textbook landing on runway 3-3 at the Florida spaceport at 11:27 a.m. Central time under clear skies and light winds. Bloomfield, Pilot Steve Frick and Mission Specialists Rex Walheim, Ellen Ochoa, Lee Morin, Jerry Ross and Steve Smith completed an 11-day flight in which four spacewalks were conducted to deliver and activate the new S-Zero (S0) girder to the ISS, which will serve as the centerpiece for a truss that will eventually span the length of a football field. Solar arrays will be mounted on the truss as well as new station modules. The S-Zero component will also serve as a switching station for electricity from the station's solar arrays to ISS elements. In addition, the truss is a base for the first rail system in space through the use of its Mobile Transporter and the upcoming Mobile Base System to be delivered to the ISS in June on which the station's robotic arm will be affixed to move up and down the length of the outpost.

The shuttle crewmembers were scheduled to depart Atlantis about an hour after landing to be driven back to the crew quarters at KSC for medical tests and reunions with their families.

The STS-110 astronauts will return home to Hangar 990 at Ellington Field in Houston near the Johnson Space Center at around 1 p.m. Central time Saturday for a welcome home ceremony. The public is invited to attend.

Meanwhile, aboard the ISS, Expedition Four Commander Yury Onufrienko and Flight Engineers Carl Walz and Dan Bursch spent the day configuring station systems for the temporary closure of the complex early Saturday in advance of a short departure in their Soyuz return vehicle and a relocation of the craft to another docking port.

Onufrienko, Walz and Bursch will board their Soyuz return vehicle early Saturday for a brief flyover from its current docking location at the nadir port of the Zarya module to the Pirs Docking compartment. The relocation of the Soyuz, which is expected to take about 35 minutes, will begin with undocking Saturday at 4:02 a.m. Central time (902 GMT). Coverage of the operation on NASA Television begins at 3 a.m. Central time (800 GMT).

The movement of the Soyuz 3 vehicle from Zarya to Pirs opens the Zarya port for the arrival of a new Soyuz 4 craft on April 27 by a three-man "taxi" crew comprised of Commander Yuri Gidzenko, who served on the first resident crew of the ISS, Flight Engineer Roberto Vittori of the European Space Agency and South African spaceflight participant Mark Shuttleworth. They will be launched from the Baikonur Cosmodrome in Kazakhstan on April 25 and will spend about a week in joint operations with the Expedition Four crew before departing from Pirs in the Soyuz 3 craft on the night of May 4.

Major systems aboard the ISS continue to function well as the station orbits at an average altitude of about 247 statute miles.