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The Global Positioning System A Shared National Asset (1995) / Chapter Skim
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Pages 51-51

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From page 51...
... The dynamic, high-multipath environment that exists for GPS receivers on aircraft makes codeless receivers especially vulnerable to losing lock on the L2 signal and requires a lengthy reacquisition time. In lieu of code-tracking capability on ~ or an alternative L-band signal, improvements to the tracking loops in codeless receivers could improve this situation.39 Findings Using post-processed GPS orbits provided by the IGS network of differential reference stations, the effects of SA can be eliminated for most Earth science applications, and with the use of dual-frequency ~codeless" receivers, centimeter-level positioning accuracies can be achieved.
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Key Terms

  • gps receivers
  • airborne geophysics
  • earth science
  • reference stations
  • science applications

  • gps receiver
  • differential gps
  • codeless receivers


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