NASA Photo ID: STS51F-33-024 File Name: 10062689.jpg Film Type: 70mm cn Date Taken: 08/01/85 Title: View of the Challenger's payload bay and the Plasma Diagnostic package Description: The solar optical universal polarimeter (SOUP) experiment is visible among the cluster of Spacelab 2 hardware in the cargo bay of the Shuttle Challenger. Various components of the instrument positioning system (IPS) are conspicuous at the center of the frame. The Plasma Diagnostic package (PDP) is seen attached to the remote manipulator system (RMS) above the open payload bay.