Tracking and Data Relay Satellite 4 (TDRS-4) was launched shortly after Tracking and Data Relay Satellite 3 (TDRS-3) by the Space Transportation System 29 (STS-29) Space Shuttle mission.
Tracking and Data Relay Satellite 4 (TDRS-4) was launched shortly after TDRS-3 by the Space Transportation System 29 (STS-29) Space Shuttle mission.
› Tracking and Data Relay Satellite (TDRS)› SCaN History of the 1980’s