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Tracking and Data Relay Satellite (TDRS) Fleet
February 11, 2014

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There are currently nine working Tracking and Data Relay Satellite (TDRS) in space. Six are operational (three first generation and three second generation), two are in storage (one first generation and one third generation) and the newest one, TDRS-L, is under going testing before being accepted into the fleet. After 20+ years of services, two first generation TDRS have been shut off and super-synced into an orbit about 300 miles higher than geosynchronous (GEO).

TDRS Constellation
TDRS Constellation
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Page Last Updated: February 11th, 2014
Page Editor: Thuy Mai