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http://pao.gsfc.nasa.gov/gsfc/service/gallery/fact_sheets/general/tdrssh.htm

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• NASA First of a New Generation of Tracking and Data Relay Satellites
  By keys2success08 in Science 1 > Astrophysics > Stargazing with astrophysics data generation nasa relay science stargazing tracking
• NASA First of a New Generation of Tracking and Data Relay Satellites
  By stocktrader2007 in Science 1 > Astrophysics > Stargazing with astrophysics data generation nasa relay science stargazing tracking

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