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All DOP GPS optimization

  • US 5,323,163 A
  • Filed: 01/26/1993
  • Issued: 06/21/1994
  • Est. Priority Date: 01/26/1993
  • Status: Expired due to Fees
First Claim
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1. An improved method of navigating an object using GPS (Global Positioning System) comprising:

  • determining the number of GPS satellites from which the object may receive radio signals;

    selecting a first constellation of four GPS satellites from such number on the basis of minimizing the dilution of precision for a standard navigation solution;

    using the radio signals received from such constellation to compute a standard navigation solution that minimizes the dilution of precision and which includes height, latitude, longitude, time and velocity components;

    selecting at least a second constellation of four GPS satellites on the basis of minimizing the dilution of precision for a special navigation solution that includes height, latitude, longitude, time and velocity components, andusing the radio signals selected from the second constellation in which the dilution of precision is minimized for one such component to compute a special navigation solution which includes height, latitude, longitude, time and velocity components.

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