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Radar tracking system having target position dead reckoning

  • US 5,168,277 A
  • Filed: 11/25/1991
  • Issued: 12/01/1992
  • Est. Priority Date: 11/25/1991
  • Status: Expired due to Fees
First Claim
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1. A vehicle mounted radar tracking system comprising:

  • an antennareceiver means connected to said antenna for receiving radar echoes from at least one target and for providing, in responded to said radar echoes, range signals indicative of the range to the respective targets;

    means for providing radar indicated azimuth signals indicative of the pointing direction of said antenna with respect to the vehicle; and

    target tracking signal processing means responsive to said range signals and said azimuth signals for providing target position signals indicative of radar indicated positions of targets being tracked and velocity signals indicative of the velocities of targets being tracked;

    characterized by;

    heading rate means for providing a heading rate signal indicative of vehicle heading rate;

    heading acceleration means for providing a heading acceleration signal indicative of vehicle heading acceleration;

    pitch rate means for providing a pitch rate signal indicative of vehicle pitch rate;

    roll rate means for providing a roll rate signal indicative of vehicle roll rate;

    target position dead reckoning signal processing means responsive to any one of the magnitudes of said heading rate signal, said heading acceleration signal, said pitch rate signal or said roll rate signal being in excess of corresponding enable threshold magnitudes for providing a turn detect signal, and responsive to the magnitudes of said heading rate signal, said heading acceleration signal, said pitch rate signal and said roll rate signal each being less than corresponding disable threshold magnitudes for removing said turn detect signal; and

    said target tracking signal processing means comprising means responsive to said turn detect signal, said position signals and said velocity signals for dead reckoning the positions of targets being tracked, and responsive to the removal of said turn detect signal for discontinuing target position dead reckoning.

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