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High accuracy, high integrity scene mapped navigation

  • US 6,347,264 B2
  • Filed: 03/07/2001
  • Issued: 02/12/2002
  • Est. Priority Date: 05/31/1994
  • Status: Expired due to Term
First Claim
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1. A method of achieving high resolution high integrity of radar scene mapped navigation utilizing digital codes comprising:

  • storing data of a plurality of scenes, each stored scene containing radar information of multiple natural or cultural features producing a locally unique pattern in a radar return, and one or more reference vectors which locate a scene relative to established ground locations in a navigational reference frame;

    determining a radar antenna system'"'"'s phase center state vector of motion in said navigation reference frame;

    making real-time radar measurements of a ground area expected to contain said features of a stored scene;

    adjusting the stored scene data to compensate for effects of said radar antenna system'"'"'s phase center state vector of motion at the time of the real-time radar measurement;

    correlating the adjusted stored scene data with the real-time radar measurements; and

    extracting data from the correlation result.

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