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The Global Positioning System A Shared National Asset (1995) / Chapter Skim
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Pages 91-96

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 91...
... As a result, the beneficial effects of adding another frequency to reduce the ionospheric error are diminished. If more advanced receivers are used, reductions in the receiver noise and multipath errors can be achieved, and the HDOP can be reduced to around 1.5.24 The error reductions achieved by using a more advanced receiver results in stand-alone SPS performance ranging from 11.3 meters to 13.!
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From page 92...
... RAIM availability, which is dependent on the presence of six useable satellite signals, is shown in Table 3-~. Although not shown in Tables 3-6 or 3-7, even further improvements to the receiver noise and multipath errors can be made through use of the most advanced receivers that have improved receiver signal processing, are integrated with auxiliary sensors, and have multi-element antenna arrays.
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From page 93...
... 93 ~ 8 C i2 ~ _ ~ '2 ~-~ oo tn ~ or ~ $ ~ ·.~ ~Cal~ ~ o ig!
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From page 94...
... 94 ·a o V, o .~ l ~ it MEL., _ ·O U
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From page 95...
... For an improved SPS receiver, the receiver noise for independent 1-second measurements can be as low as 0.2 m for the narrow-band signal, and 0.1 meter for the wide-band signal. These are the single-frequency errors and must be increased to account for the linear combination used to calibrate ionospheric errors.
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From page 96...
... For an improved PPS receiver, the receiver noise for independent 1-second measurements can be as low as 0.1 meters (lord. These are the single-frequency errors and must be increased to account for the linear combination used to calibrate ionospheric errors.
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Key Terms

  • multipath error
  • collision avoidance
  • ionospheric error
  • ephemeris error
  • linear combination

  • pps receiver
  • accuracy requirements
  • navigation message
  • receiver noise
  • ionospheric corrections

  • sps receiver
  • protection limit
  • nautical mile
  • processing capability
  • horizontal accuracy

  • ranging data
  • pps receivers
  • satellite signals
  • multipath errors
  • ionospheric errors

  • typical sps
  • signal processing
  • typical receiver
  • multipath processing
  • receiver described

  • typical horizontal
  • lower noise
  • software models
  • horizontal dop
  • noise amplifier


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