STS-37 payload - Gamma Ray Observatory (GRO) - on RMS in OV-104's payload bay

STS037-99-031 (7 April 1991) --- The Gamma Ray Observatory (GRO) is still in the grasp of Atlantis' remote manipulator system (RMS) in this 70mm scene, photographed from inside the crew cabin. A special extravehicular activity (EVA) was required by astronauts Jerry L. Ross and Jerome (Jay) Apt to manually extend the high-gain antenna on GRO. The solar array panels are not yet deployed in this scene. The five-member crew capped off a busy Flight Day 3 by releasing the heavy payload.