Encyclopedia Astronautica
2008.03.14 - ISS On-Orbit Status 03/14/08

STS-123/1J/A Flight Day 4 (FD4).

Crew sleep cycle today:sleep 8:00am-4:30pm; wake 4:30pm-7:00am tomorrow.

Mission 1J./A's EVA-1 was completed successfully by Rick Linnehan & Garrett Reisman in 7h 1m, accomplishing all its objectives (no get-aheads).
(During the spacewalk, Linnehan (EV1) & Reisman (EV2) -

Prepared the JAXA JLP (JEM Experiment Logistics Module Pressurized Section) for its transfer, i.e. -
opened and secured the protective flap over the Node-2 topside (zenith) hatch viewport for the internal CBCS (Centerline Berthing Camera System),
removed 8 PCBM (Passive Common Berthing Mechanism) contamination protection covers,
demated & stowed JLP LTA (Launch-to-Activation) connectors & installed protective caps on the LTA receptacles;
Performed Part 1 Assembly of the SPDM (Special Purpose Dexterous Manipulator), i.e. -
released two OTCMs (ORU Tool Changeout Mechanisms) from the launch locations on the SLP (Spacelab Pallet),
installed the OTCMs on the SPDM,
released the OTP EDFs (ORU Temporary Platform Expandable Diameter Fasteners),
inspected the SLP PDGF (Power & Data Grapple Fixture) horseshoe connectors;
Took photographs of the SPDM, and
Installed a protective wire tie over the sharp edge divot discovered during Flight 1A on the Airlock (A/L) handrail.
Official start time of the spacewalk was 9:18pm EDT, about 5 min ahead of timeline, and it ended at 4:19am. Total EVA duration (PET = Phase Elapsed Time) was 7h 1min. It was the 105th spacewalk for ISS assembly & maintenance and the 77th from the station (55 from Quest, 22 from Pirs, 28 from Shuttle) totaling 472h 22min, and the 9th for Expedition 16 (totaling 64h 30min) and the 6th so far this year. After today's EVA, a total of 131 spacewalkers (99 NASA astronauts, 21 Russians, and 11 astronauts representing Japan-1, Canada-4, France-1, Germany-2 and Sweden-3) have logged a total of 660h 44min outside the station on building, outfitting and servicing. It was also the 127th spacewalk involving U.S. astronauts.)

In addition, Japan's JLP module was successfully installed on the Node-2 'Harmony' zenith dock at ~3:00am. (Dom Gorie & Takao Doi, supported by Bob Behnken & Leo Eyharts, maneuvered the SSRMS (Space Station Remote Manipulator System) to grapple the JLP in the cargo bay, unberth it and transfer it to the Node-2 topside CBM. All motorized bolts were properly engaged to firmly hold the experiment container at its place, and the standard leak check on the vestibule between it and the Node-2 port was started, to be concluded tonight after crew wake-up. JLP ingress is scheduled afterwards, at around 12:30am EDT.)

SPDM Power Glitch: The overnight Robotics troubleshooting with a quickly developed and uplinked software patch was unsuccessful and has not restored power to the SPDM in the SLP for activating 'Keep-Alive' heaters (however, thermal blankets were left in place during EVA-1 to provide adequate protection). With the RWS (Robotics Workstation) software thus exonerated, a closer review of SLP drawings revealed a design error as most likely cause: in configuring the 1553-bus harness architecture on the SLP, MIL-1553 Standards were not followed, resulting in two bi-directional receivers (amplifiers) directly connected to each other without proper bus termination, causing comm 'reflection' between the POA (Payload ORU Attachment) and the SLP PDGF (Power & Data Grapple Fixture) on the 1553 bus. The decision was made to try providing Dextre with power via the SSRMS by connecting it to the SPDM PDGF as soon as possible. The originally scheduled SSRMS-grappling of the OBSS (Orbiter Boom Sensor System) in the PLB (Payload Bay) and its subsequent handoff to the SRMS (Shuttle Remote Manipulator System) for 'parking' will still be performed tonight (since SRMS is already in the grapple position), but immediately following, the PDGF will be grappled with the SSRMS to provide power. If this works as expected, the sequence of SSRMS maneuvers on later days will also be modified to ensure that the Canadarm-2 remains connected to the SPDM except during EVA-2 and EVA-3, until Dextre is free of the dysfunctional SLP (which apparently underwent Integration Testing at KSC that was flawed).

After wakeup at ~4:30pm EDT last night, ending the 8.5-hr sleep period on 10.2 psi before the spacewalk, the Airlock Crewlock (A/L CL) hatch was cracked (i.e., temporarily repressurized) at ~5:10pm for a hygiene break/with mask prebreathe for Garrett and Rich, the hatch was closed again at ~5:55pm for EVA preps in 10.2 psi, followed by EMU purge & prebreathe. Afterwards, IVs supported the CL depressurization and EV1/EV2 egress (EMUs switched to batteries at 9:18pm).

After the spacewalkers' ingress at 4:19am, post-EVA activities by CDR Whitson and FE-2 Eyharts in the A/L consisted of recharging the EMU/spacesuits with water from PWR (Payload Water Reservoir), then reconnecting the LTAs (Lower Torso Assemblies) to the EMUs and capping the UIA (Umbilical Interface Assembly), initiating and monitoring the regeneration of the METOX (Metal Oxide) CO2 filter canisters, initiating the discharge/recharge process on the EMU batteries in the BSA (Battery Stowage Assembly), and reconfiguring EVA tools.

A new item added to the 'job jar' list for Peggy was to perform the regular update of the three 'Warning' procedures books with about a dozen new pages reflecting the newly changed station makeup.

Tasks on Yuri Malenchenko's 'available time' suggestions list for last night were the regular daily checkup on the Japanese experiment GCF-JAXA (Granada Crystallization Facility) in the Russian TBU incubator, maintained at +20 degC, including a temperature check on its ART (automatic temperature recorder), and the daily monitoring, picture-taking and downloading for the BIO-5 Rasteniya-2 ("Plants-2") experiment which researches growth and development of plants (peas) under spaceflight conditions in the Lada-12 greenhouse from IBMP (Institute of Bio-Medical Problems {Russian: IMBP}).

Leo Eyharts also worked in Node-2 to disassemble and remove the CBCS.

For both crews, currently asleep, workday begins later today at 4:30pm EDT. After their 8.5-hr. sleep period, the ISS crew will support the transfer of the OBSS with the SSRMS from the Shuttle PLB for handoff to the SRMS, then grapple the SPDM PDGF with the SSRMS and make preparations for tomorrow night's EVA-2.

Before breakfast, as suggested on her discretionary 'job jar' task list, Peggy Whitson will complete another 'overnight' run with the SLEEP experiment (Sleep-Wake Actigraphy & Light Exposure during Spaceflight) software for data logging and filling in questionnaire entries in the experiment's laptop session file on the HRF-1 laptop for downlink. (To monitor the crewmember's sleep/wake patterns and light exposure, Peggy put on a special Actiwatch device which measures the light levels encountered by him as well as his patterns of sleep and activity throughout the Expedition. The log entries are done within 15 minutes of final awakening for seven consecutive days, as part of the crew's discretionary 'job jar' task list.)

Other crew activities after 4:30pm and during the night until 7:00am are to include such items as -

Peggy Whitson concluding the leak check of the JLP/Node-2 vestibule, turning off the MKAM (Minimum Keep-Alive Monitor) fan after check status and shell temperature and some initial outfitting to provide Node-2 power, then following up with completion of outfitting;
FE-1 Malenchenko taking air samples at JLP hatch opening using the Russian AK-1M and IPD-CO samplers, joined by other crewmembers collecting samples with the CSA-CP (Compound Specific Analyzer-Combustion Products), CDMK (Carbon Dioxide Monitoring Kit) and GSC (Grab Sample Container) instruments,
Ingress in JLP by Takao. Peggy, Yuri and Rick (with crewmembers being advised to don PPE (Personal Protective Equipment) surgical masks and goggles until 30 min have elapsed after JPL ingress and later stow the masks for LiOH changeout),
The periodic (generally monthly) service of the ESA/RSC-Energia experiment ALTCRISS (Alteino Long Term monitoring of Cosmic Rays on the ISS) by Malenchenko, removing its PCMCIA memory card from the AST spectrometer and replacing it with a new card,
A checkout of the JLP's NPRV (Negative Pressure Relief Valve) and ELPS (Emergency Lighting & Power Supply) by Whitson,
Yuri stowing trash and discarded equipment on Progress 28P, to be jettisoned on 4/7,
Eyharts and Reisman spending about an hour on handover activities with Reisman, who will assume Leo's FE-2 position after Shuttle departure, and
Peggy monitoring N2 (nitrogen transfer from the Shuttle to ISS, already in progress since this morning (expected total ~20lbs).
In addition, the FE-1 will continue the extended leak checking of the spare BZh Liquid Unit (#056) for the Elektron O2 generator by checking the unit's pressure and charging it once again with pressurized N2 from the BPA-M Nitrogen Purge Unit (#23) to 1 atm (1 kg/cm2). The last test pressurization was on 3/11. (During Elektron operation, the inert gas locked up in the BZh has the purpose to prevent dangerous O2/H2 mixing. A leaking BZh cannot be used.)

ATV 'Jules Verne' Update (Flight Day 5): All ATV systems continue to perform nominally. Early this morning, the ATV successfully performed the CAM (Collision Avoidance Maneuver) Demonstration. The maneuver began at 3:57:35am EDT. Based on the ATV GPS (Global Positioning System) satellite data, ballistics specialists estimate that the CAM delta-V was approximately 5.3 m/s, which includes the effects of the first MSU (Monitoring & Safing Unit) attitude maneuver to sun pointing. The total delta-V for the operation, including the CAM and the post-CAM attitude maneuvers, is estimated at 7.1 m/s, which is within the expected range. The FTC (Fault Tolerant Computer) reset to exit Survival mode occurred at 5:35am. MSU1 was switched off at 6:53am, and MSU2 was switched off at 7:01am. At 7:23am, ATV-CC reported that the vehicle was restored to the nominal configuration. (The MSU computer is based on dual redundant lane processor architecture using special software for highly critical functions. Among else, it detects a Red Button CAM request by the ISS crew or ATV-CC/Toulouse; it also can automatically determine the necessity of a CAM upon detecting an abnormal ATV kinetic state or system failure, and executes the CAM, ensuring ISS safety. It then controls the ATV for up to 24 hours, thus assuming a major role in the ATV Survival mode.)

ISS Crew Sleep Shift Planning: To synchronize the ISS crew's timeline with STS-123/1J/A docking and subsequent docked activities, Peggy's, Yuri's and Leo's wake/sleep cycle is undergoing a number of shifts which started on 3/11. For the next six days, the wake/sleep shift schedule is as follows (all times EDT):

FD5 Wake: 4:30pm (3/14) - 7:00am (3/15)
Sleep: 7:00am - 3:30pm (3/15)

Wake: 3:30pm (3/15) - 7:00am (3/16)
Sleep: 7:00am - 3:30pm (3/16)

Wake: 3:30pm (3/16) - 6:00am (3/17)
Sleep: 6:00am - 2:30pm (3/17)

Wake: 3:30pm (3/17) - 6:00am (3/18)
Sleep: 6:00am - 2:30pm (3/18)

Wake: 2:30pm (3/18) - 5:00am (3/19)
Sleep: 5:00am - 1:30pm (3/19)

Wake: 1:30pm (3/19) - 5:00am (3/20)
Sleep: 5:00am - 1:30pm (3/20)

ISS Orbit (as of this morning, 7:34am EDT (= epoch)):
Mean altitude -- 340.6 km
Apogee height -- 341.3 km
Perigee height -- 339.8 km
Period -- 91.35 min.
Inclination (to Equator) -- 51.64 deg
Eccentricity -- 0.00011
Solar Beta Angle -- 20.7 deg (magnitude increasing)
Orbits per 24-hr. day -- 15.76
Mean altitude loss in the last 24 hours -- 80 m
Revolutions since FGB/Zarya launch (Nov. 98) -- 53358

More... - Chronology...

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