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Wikipedia definition
1. Tracking and Data Relay SatelliteA Tracking and Data Relay Satellite (TDRS) is a type of communications satellite that forms part of the Tracking and Data Relay Satellite System (TDRSS) used by NASA and other United States government agencies for communications to and from independent "User Platforms" such as satellites, balloons, aircraft, and the International Space Station.
Read “Tracking and Data Relay Satellite” on English Wikipedia
Read “TDRS” on Japanese Wikipedia
Read “Tracking and Data Relay Satellite” on DBpedia

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