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Global augmentation to global positioning system

  • US 6,531,981 B1
  • Filed: 04/30/2001
  • Issued: 03/11/2003
  • Est. Priority Date: 05/01/2000
  • Status: Expired due to Term
First Claim
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1. A system for corresponding data associated with primary correction of at least one first measurement of a GPS satellite characteristic to data representing a second measurement of the GPS satellite characteristic taken at a mobile receiver, the system comprising:

  • a first processor adapted to compute primary data representing the primary correction;

    at least one wide-area GPS corrections receiver coupled to said processor; and

    at least one local-area GPS corrections receiver coupled to said processor, wherein said wide-area and local-area receivers are adapted to determine secondary data associated with correction of said determined first measurement, wherein said local-area secondary data is weighted proportionally according to distance from the mobile receiver to a one of said at least one local-area receiver from which said secondary data was received, and wherein said wide-area secondary data is weighted relative to the local-area secondary data.

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