Skip to main content

The Global Positioning System A Shared National Asset (1995) / Chapter Skim
Currently Skimming:


Pages 58-59

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 58...
... A full-scale space vehicle, either piloted or unpiloted, may one day use GPS-based technology for emergency crew return or cargo return from Earths orbit.57 Accuracy requirements have not been provided for these experimental applications. Most range safety tracking for launch vehicles currently is conducted using a rather elaborate and expensive system consisting of ground tracking radars and associated equipment.
Read the entire page →
From page 59...
... This could be accomplished using a DGPS datalink or a pseudolite located at the range or, as suggested by one expert in range safely, by using some spare data bits available in the GPS navigation message itself.60 Current flight termination telecommands, which are used to initiate selfdestruction, are broadcast in the UHF frequency band. This band is very susceptible to spoofing, jamming, and interference.
Read the entire page →

Key Terms

  • orbit determination
  • range safety
  • accuracy requirements
  • navigation message
  • attitude determination

  • carrier phase
  • gps signal
  • global positioning
  • gps attitude
  • gps requirements

  • determination accuracy
  • accomplished using
  • flight termination
  • launch vehicle
  • inertial navigation

  • gps receiver
  • launch vehicles
  • range applications
  • orbital science
  • determination range


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.