Design
The communications systems of the TDRSS satellites were designed to support multiple missions at the same time. Each satellite has S band, Ku band (1st Gen only), and Ka band (2nd gen only) electronic communication systems hardware that operate at different carrier frequencies and also support various data-rates. The newer Boeing satellites are able to support more communications than the older TRW-built satellites.
Read more about this topic: Tracking And Data Relay Satellite
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