Launch Success
Liftoff Time (GMT)
19:21:00
Wednesday July 25, 1990
Watch Replay
24/7 Coverage
Track Payloads
Maiden flight of Atlas I.
The Combined Release and Radiation Effects Satellite (CRRES) was launched on July 25, 1990, into a geosynchronous transfer orbit (GTO) for a nominal three-year mission to investigate fields, plasmas, and energetic particles inside the Earth's magnetosphere. As part of the CRRES program, the SPACERAD (Space Radiation Effects) project, managed by Air Force Geophysics Laboratory, investigated the radiation environment of the inner and outer radiation belts and measured radiation effects on state-of-the-art microelectronics devices.
Geostationary Transfer Orbit
1 Payload
4,383 kilograms
1st
Mission
1st
Mission of 1990
68th
Orbital launch attempt