Encyclopedia Astronautica
2002.04.12 - STS-110 Mission Status Report #09


The ten crewmembers of the Atlantis / International Space Station complex transferred experiments and supplies into their respective vehicles today as the latest addition to the station, the S-Zero (S0) Truss, continued to pass its initial checkouts with flying colors.

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.

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