STS043-83-082 (2-11 Aug 1991) --- Having bade farewell to its Tracking and Data Relay Satellite/IUS payload, Atlantis' cargo bay appears somewhat vacant in this scene, backdropped over the southern two-thirds of the Florida peninsula. Important activity in the payload bay continues, however, with the operation of Space Station Heat Pipe Advanced Radiator Element (SHARE II), an experiment carried on the starboard side (lower left quadrant of frame). Purpose of the SHARE experiment is to demonstrate microgravity thermal vacuum performance of a heat pipe radiator for heat rejection as a prelude to development of a Space Station heat rejection system. The foil covered ring and horseshoe shaped objects aft in the payload bay served as restraint devices for the TDRS-E prior to its deployment six hours after Atlantis lifted off from Kennedy Space Center's Launch Pad 39A.