Description : STS-39 was the twelfth mission of the Space Shuttle Discovery. The primary purpose of the mission was to conduct a variety of payload experiments for the Department of Defense. The mission was postponed 2 times, for technicals reasons.
STS-39 was a dedicated Department of Defense mission. Unclassified payload included Air Force Program-675 (AFP675); Infrared Background Signature Survey (IBSS) with Critical Ionization Velocity (CIV), Chemical Release Observation (CRO) and Shuttle Pallet Satellite-II (SPAS-II) experiments; and Space Test Payload-1 (STP-1). Classified payload consisted of Multi-Purpose Release Canister (MPEC). Also on board was Radiation Monitoring Equipment III (RME III) and Cloud Logic to Optimize Use of Defense Systems-1A (CLOUDS-1A).
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Space Event :

STS 39 (DISCOVERY) · MILITARY DEFENSE MISSIONS