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The Global Positioning System A Shared National Asset (1995) / Chapter Skim
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Pages 82-83

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From page 82...
... Since WAAS will broadcast its differential corrections as part of the navigation message data carried by a GPS-like Lo signal, a high-data rate for the differential correction is required, which constrains the flexibility of providing additional information on the navigation message. If SA were eliminated, the data rate requirement could be relaxed and more information, such as GPS integrity information and other safety or air traffic control related information, could be sent to the user.
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From page 83...
... In addition, the removal of SA and the subsequent increase in accuracy obtainable by civil and commercial GPS users would have substantial benefits, as previously discussed. If the use of SA is eliminated, the NRC committee also expects that the market for GPS receivers and systems would increase substantially, as discussed further in Appendix E
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Key Terms

  • gps receivers
  • navigation message
  • data rate
  • differential corrections
  • gps signal

  • civilian accuracy
  • current level
  • gps receiver
  • air traffic
  • gps signals

  • basic gps
  • improve accuracy
  • range error
  • civilian users
  • military gps

  • increase substantially
  • dgps corrections
  • gps integrity
  • satellite navigation
  • difficulty military

  • dgps stations


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