TDRS-1, known before launch as TDRS-A, was an American communications satellite, operated by NASA as part of the Tracking and Data Relay Satellite System. It was constructed by TRW and launched by on its maiden flight, STS-6.[3]
History
While on the pad, problems were detected with Challenger main engines and repairs began. During this time, a severe storm contaminated TDRS-1 while it was in the Payload Change-out Room on the Rotating Service Structure at the launch pad. The satellite had to be returned to its checkout facility, where it was cleaned and rechecked.[4] Challenger finally lifted off from Launch Complex 39A of the Kennedy Space Center at 18:30:00 UTC on 4 April 1983.[5]