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Recursive method for target motion analysis

  • US 5,877,998 A
  • Filed: 11/18/1996
  • Issued: 03/02/1999
  • Est. Priority Date: 11/18/1996
  • Status: Expired due to Fees
First Claim
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1. A method for estimating the motion of a target relative to an observer station, said method comprising the steps of:

  • generating data representative of the motion of said target relative to said observer station during first and second measurement legs;

    processing said data to yield a smoothed estimate of the bearing rate, bearing and bearing acceleration of said target during each measurement leg;

    processing said smoothed estimate of the bearing rate, bearing and bearing acceleration of said target to provide an estimate of the position of the target relative to said observer station and the velocity of said target and to thereby provide an estimate of the motion of said target; and

    said data processing step comprising sensing the motion of the observer station using at least one navigation sensor;

    generating a model of the motion of the observer station; and

    determining an initial estimate of the range from the observer station to the target at a first instance of time and an error covariance matrix using said smoothed estimate of the bearing rate, bearing and bearing acceleration and data representing said model of the motion of said observer station.

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