[sarex] ISS Status Report: SS07-06
azrowe80 at verizon.net
Sun Feb 4 15:36:11 PST 2007
SUBMITTED BY ARTHUR N1ORC - AMSAT A/C #31468
> Feb. 4, 2007
> Katherine Trinidad
> Headquarters, Washington
> John I. Petty
> Johnson Space Center, Houston
> STATUS REPORT: SS07-06
> INTERNATIONAL SPACE STATION STATUS REPORT: SS07-06
> HOUSTON - For the second time in four days, two residents of the
> International Space Station stepped outside for a spacewalk to
> complete connecting cooling loops from a temporary to a permanent
> system. This time the excursion lasted just over seven hours.
> Wearing U.S. spacesuits, Expedition 14 Commander Mike Lopez-Alegria
> and Flight Engineer Suni Williams began their spacewalk at 7:38 a.m.
> CST, a few minutes ahead of schedule. After setting up tools and
> tethers outside the Quest airlock, they moved to the area that
> connects the Z1 truss to the S0 truss at the middle of the station's
> large girder-like truss system. This area is known as the "rats'
> In these tight quarters, they rerouted a series of two electrical
> cables and four fluid quick disconnect lines from the soon-to-be
> defunct Early External Active Thermal Control System to a permanent
> cooling system in the Destiny Laboratory. The cooling loop
> reconfigured Sunday, known as the Moderate Temperature Loop (Loop B),
> removes heat from the station's avionics systems and payload racks
> through a heat exchanger system in the Destiny Laboratory. On Jan.
> 31, Lopez-Alegria and Williams reconfigured a Low Temperature Loop
> (Loop A) that rejects heat from the station's environmental systems.
> On Sunday, the spacewalkers also assisted in the retraction of the aft
> heat-rejecting radiator on the P6 truss. The radiator had been used
> since 2000 to keep station systems at the correct temperature through
> the temporary cooling system. They helped tie the radiator down with
> a series of cinches. Unlike the starboard radiator, which was
> retracted Jan. 31, the aft radiator did not require the installation
> of a protective thermal shroud due to the station's orientation to
> the sun. During this summer's STS-118 shuttle mission, a third
> radiator will be retracted, the only radiator on the P6 truss that
> will be redeployed after the truss is relocated to the far port side
> of the truss.
> Once the radiator was retracted, Lopez-Alegria and Williams completed
> Wednesday's unfinished task of disconnecting and stowing the second
> of two fluid lines for the Early Ammonia Servicer, a large tank on
> the P6 truss that is no longer needed. The EAS was designed to
> replenish ammonia to the temporary cooling system on the station in
> the event of a coolant leak. The servicer will be jettisoned during a
> spacewalk by the Expedition 15 crew this summer.
> Lopez-Alegria, at the base of the P6 truss, photographed the starboard
> solar array and the blanket box into which it folds. Engineers will
> analyze the photos and finalize plans to retract that array during
> the STS-117 shuttle mission to the station next month.
> After the photographs were taken, Lopez-Alegria and Williams resumed
> the stringing of electrical cables from the S0 truss to the Destiny
> Laboratory and to its forward docking port, Pressurized Mating
> Adapter-2 (PMA-2), to which visiting shuttles dock. The cables
> provide electricity for the Station-to-Shuttle Power Transfer System
> (SSPTS). The system will enable docked shuttles to draw electrical
> power from the station to extend their missions. SSPTS is scheduled
> to debut during STS-118, enabling Endeavour to fly for two weeks.
> Three of the six cables were connected Sunday. The others probably
> will be connected during a spacewalk Thursday, Feb. 8.
> Lopez-Alegria removed a sunshade from a data relay box on another
> pressurized mating adapter that connects the U.S. and Russian
> segments of the station. Since the shade is no longer needed, it was
> folded up and brought inside to be discarded either on a future
> Russian Progress cargo ship or a shuttle mission. Back in the
> airlock, Lopez-Alegria and Williams did some precautionary
> decontamination procedures after a few ammonia flakes were seen early
> in the spacewalk.
> The spacewalk ended at 2:49 p.m. as the crew returned to Quest. It was
> the eighth spacewalk of Lopez-Alegria's career and the third for
> Williams. He surpassed astronaut Steve Smith to vault into third
> place on the all-time spacewalking list for most hours spent outside.
> Williams now holds the record for most spacewalking time by a female.
> Former astronaut Kathy Thornton previously held that honor. Sunday's
> spacewalk was the 79th for station assembly and maintenance and the
> 51st done without a shuttle present.
> On Monday, Lopez-Alegria and Williams will recharge batteries and
> prepare their spacesuits and tools for the next spacewalk set for
> Thursday morning.
> For more about the crew's activities and station sighting
> opportunities, visit:
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