STS-41G OSTA-3

41G-03-008 (5-13 Oct. 1984) --- The end effector of the space shuttle Challenger's remote manipulator system (RMS) taps against the shuttle imaging radar's (SIR-B) antenna to secure it during NASA's 41-G mission. The Challenger's payload bay is open and the pallet containing OSTA-3 experiments is visible. Photo credit: NASA