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Line 43: ===TDRS background=== :''Source: NASA: TDRS A Satellite''<ref name=tdrsa>{{cite web\|url=~~http~~https://nssdc.gsfc.nasa.gov/nmc/~~spacecraftDisplay~~spacecraft/display.doaction?id=1983-026B \|title=NASA – NSSDC – Spacecraft – Details \|publisher=Nssdc.gsfc.nasa.gov \|date=August 16, 2013 \|accessdate=February 5, 2014}}</ref> TDRS-A was the first of TDRSS multiple satellite tracking system. The system is a concept utilizing communication satellite technology that improves and economizes the satellite tracking and [[telemetry]] operations. The base three [[geosynchronous satellites]] (one a standby) track and receive data from satellites for relay to a ground station. The two primary active satellites are separated in orbit by at least 130 degrees longitude.

Tracking and data relay satellite: Difference between revisions