NASA astronauts Chris Cassidy and Robert Behnken concluded their spacewalk at 1:10 p.m. EDT, after six hours. The two NASA astronauts completed all the work to replace batteries that provide power for the International Space Station’s solar arrays on the starboard truss of the complex. The new batteries provide an improved and more efficient power capacity for operations.
The spacewalkers removed six aging nickel-hydrogen batteries for the second of two power channels for the starboard 6 (S6) truss, installed three new lithium-ion batteries, and installed the three associated adapter plates that are used to complete the power circuit to the new batteries. Mission control reports that all three new batteries are working.
Behnken and Cassidy are scheduled to conduct one more spacewalk Tuesday, July 21, during which they will remove two lifting fixtures used for ground processing of the station’s solar arrays prior to their launch. They’ll also begin preparing the Tranquility module for the installation of a commercial airlock provided by NanoRacks and scheduled to arrive on a SpaceX cargo flight later this year. The airlock will be used to deploy commercial and government-sponsored experiments into space.
To read a full recap of today’s spacewalk, visit the agency’s Space Station blog.