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The Global Positioning System A Shared National Asset (1995) / Chapter Skim
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Pages 68-69

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
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From page 68...
... For the military PPS (Precise Positioning Service) signal, the largest error contributors are the clock and ephemeris errors, the receiver noise, and multipath errors, since the PPS signal is not degraded by SA.
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From page 69...
... As for the ionospheric error, the multiplication of this error by HDOP to obtain the horizontal error is a conservative calculation. This value is based on observed data as noted in "Ephemeris and Clock Navigation Message Accuracy in the Global Positioning System." (See note a above)
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Key Terms

  • multipath error
  • ionospheric error
  • ephemeris error
  • combined clock
  • linear combination

  • pps receiver
  • navigation message
  • receiver noise
  • sps receiver
  • ephemeris errors

  • noise error
  • gps accuracy
  • pps receivers
  • multipath errors
  • typical sps

  • global positioning
  • pps signal
  • clock navigation
  • typical horizontal
  • message accuracy

  • software models
  • horizontal dop
  • models correct
  • differential gps
  • positioning service

  • range error
  • clock errors
  • navigation requirements
  • pps multipath
  • sps signal


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