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TDRS 9 (Tracking and Data Relay Satellite 9) is an American geosynchronous communications satellite that was launched by an Atlas 2A rocket from Cape Canaveral AFB at 22:59 UT on 8 March 2002. It is primarily intended to capture data streams from low-earth satellites and relay them to ground, and vice versa. With a mass of 1,781 kg, power of 2.3 kW, a pair of steerable, transponding antennas of diameter 5 m, and pair of solar arrays of length 21 m,

TDRS 9 can simultaneously transmit and receive in S-band and in either Ku- or Ka-band. In single access S-band the spacecraft can transmit at speeds up to 6 Mbps return and 300 Kbps forward rates. In multiple access S-band up to five return channels and one forward channel per spacecraft with rates to 3 Mbps return and 300 Kbps forward are supported. Reception rates are 300 Mbps return and 25 Mbps in the Ku-band. A new high-frequency service is available in the Ka-band that increases data rate capabilities from 300 Mbps to 800 Mbps. These features are common to all three of the second generation TDRSs, 8, 9 and 10.

The primary ground terminals for data reception are the White Sands Complex (WSC) and the Guam Remote Ground Terminal (GRGT).

Alternate Names

  • 27389
  • TDRS 9
  • Tracking and Data Relay Satellite 9

Facts in Brief

Launch Date: 2002-03-08
Launch Vehicle: Atlas 2A
Launch Site: Cape Canaveral, United States
Mass: 1781 kg
Nominal Power: 2.3 W

Funding Agency

  • NASA-Space Communications and Navigation Office (United States)


  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office


Related Information/Data at NSSDCA


Other Sources of TDRS Information/Data

TDRS program

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