Expedition 66 Spacewalk 78 Animation - November 29, 2021

U.S. Spacewalk 78 Animation

This animation discusses U.S. Spacewalk 78 in which NASA Astronauts Thomas Marshburn and Kayla Barron will replace a faulty S-band Antenna Subassembly, or SASA, with a spare antenna system already attached to the space station’s exterior. Marshburn and Barron will work at the Port 1 (P1) truss structure, where the antenna is mounted. The antenna recently lost its ability send signals to Earth via NASA’s Tracking and Data Relay Satellite System in mid-September, but because of several redundancies on station, did not make a significant impact to station operations. This is the first spacewalk to replace a SASA since Joe Tanner and Heidi Stefanyshyn-Piper replaced a SASA on the S1 truss during STS-115 on Sept. 16, 2006.