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Here are details about a : Space commemorative cover or Space Cover.
Cosmodrom : USA
Date of Cancellation: Jun 2, 1976 Kind of Event : Launch Launch pad : USA Vandenberg (CA)
habité?/manned?: robot Mission type : Telecommunications
ou?/where?: au sol - ground
autographe?: non - none
Description : The Satellite Data System (SDS-1) was composed of two operational satellites that had supported near-real time communications between low altitude photographic intelligence satellites and ground control stations, making it a critical part of the US Air Force Satellite Communications (AFSATCOM) System. In particular, SDS-1 served as a communications link between the Air Force Satellite Control Facility at Sunnyvale, CA, and 7 remote tracking stations located at Vandenberg AFB, Hawaii, Guam, Nahe Island, Greenland, the UK, and Boston.
Vandenberg post stamp and USAF Com relais satellite.