Archive - Jul 22, 2009
Wed, 22 Jul 2009 09:37:10 AM CDT
Spacewalkers Dave Wolf and Chris Cassidy began the STS-127 mission's third spacewalk about 30 minutes ahead of schedule, at 10:32 a.m. EDT.
Wolf and Cassidy first will remove multilayer insulation from the Kibo module and prepare the Japanese Exposed Section payloads for their transfer from the Exposed Section to the Exposed Facility on Thursday. Then they will focus on battery replacements. The space station power system is a photovoltaic system that gathers solar power and stores it in batteries. Wolf and Cassidy will replace four of six old batteries in one of the six station power channels, channel 2B. In preparation for the task, the old batteries have been drained and the electrical loads normally handled by 2B have been placed on different power channels.
The Expedition 20 and STS-127 crews continued their joint operations Tuesday. The combined efforts of both crews were successful in installing the Japanese Logistics Module-Exposed Section using two robotic arms.
STS-127 Commander Mark Polansky and mission specialist Julie Payette operated the robotic arm aboard the space shuttle to pass the platform from Endeavour to Canadarm2 on the space station. Canadarm2 was operated by STS-127 mission specialist Koichi Wakata and shuttle pilot Doug Hurley.
The Japanese robotic arm on the station will be used Thursday to take experiments from that Exposed Section and install them on the new porch of the Kibo laboratory.