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The Global Positioning System A Shared National Asset (1995) / Chapter Skim
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Pages 170-170

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From page 170...
... The ground-based communications network watt consist of 24 w~de-area reference stations, two wide-area master stations, and two satellite uplink sites. Differential corrections and integrity data derived from the ground-based network, as well as additional ranging data, watt be broadcast to users from the geostationa~y satellites using an "~-like" signal with a frequency of 1575.42 MHz.48 The REP calls for the WAAS to be in place by the end of 1997.
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Key Terms

  • ranging data
  • dgps services
  • differential corrections
  • reference stations
  • coast guard

  • global positioning
  • precision approach
  • differential gps
  • permanent dgps
  • aviation administration

  • gps services
  • federal aviation
  • route navigation
  • dgps reference


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