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Differential satellite positioning system ground station with integrity monitoring

  • US 5,600,329 A
  • Filed: 06/30/1995
  • Issued: 02/04/1997
  • Est. Priority Date: 06/30/1995
  • Status: Expired due to Term
First Claim
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1. A differential satellite positioning system ground station for determining GPS differential correction information with integrity monitoring, said differential satellite positioning system ground station comprising:

  • a plurality of GPS signal receivers, each at a known geocentric position, each operative for receiving a satellite-specific information signal transmitted from each of selected ones of a plurality of satellite vehicles, and each operative for deriving, from each of said received satellite-specific information signals from said satellite vehicles, receiver-satellite-specific GPS signal information;

    first differential correction processing means for deriving receiver-satellite-specific GPS differential correction information associated with each of said satellite-specific information signals, where said receiver-satellite specific differential correction information is a function of said receiver-satellite-specific GPS signal information determined by a specific one of said GPS signal receivers and said known position of said GPS signal receivers for the same one of said GPS signal receivers;

    second differential correction processing means operative for determining satellite-specific GPS differential correction information, associated with each of said satellite-specific information signals, as a function of said receiver-satellite-specific GPS differential correction information determined by more than one of said plurality of GPS signal receivers and associated with the same one of said satellite-specific information signals;

    ground station integrity monitoring means for determining satellite-specific integrity information associated with each of said satellite-specific information signals, as a function of said receiver-satellite-specific GPS differential correction information and said satellite-specific GPS differential correction information, where said satellite-specific integrity information is descriptive of the integrity of said satellite-specific GPS differential correction information.

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