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Utilization of exact solutions of the pseudorange equations

  • US 5,914,686 A
  • Filed: 08/05/1997
  • Issued: 06/22/1999
  • Est. Priority Date: 01/11/1997
  • Status: Expired due to Term
First Claim
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1. A method for determining location fix coordinates for a location determination (LD) station, the method comprising the steps of:

  • receiving LD signals from a plurality of LD signal sources at an LD station and determining a pseudorange value between the LD station and each LD signal source;

    processing the pseudorange values to produce at least one linear relation that exactly relate location fix coordinates for the LD station to location coordinates of at least two of the LD signal sources, with no approximation; and

    using the at least one linear relation together with one pseudorange value to produce a nonlinear relation that exactly relates the location fix coordinates for the LD station to the location coordinates of at least one of the LD signal sources, from which the location fix coordinates can be calculated without iteration or approximation.

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