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Antenna stabilization error correction system for radar

  • US 5,485,156 A
  • Filed: 09/21/1994
  • Issued: 01/16/1996
  • Est. Priority Date: 09/21/1994
  • Status: Expired due to Term
First Claim
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1. A radar system comprising:

  • antenna controller and stabilization processor means connected to an aircraft attitude sensor;

    antenna positioner means connected to said antenna controller and stabilization processor means;

    antenna means connected to said antenna positioner means for transmitting signals, for receiving signals and for receiving ground clutter;

    transmitter/receiver means connected to said antenna means;

    signal processor means connected to said transmitter/receiver means, said antenna controller and stabilization processor means and an aircraft radio altimeter;

    antenna stabilization error correction system connected to said signal processor means, said antenna controller and stabilization processor means and said aircraft radio altimeter means, wherein said antenna stabilization error correction system estimates pitch, roll and elevation errors and transmits corrected signals to said antenna controller and stabilization processor means;

    said antenna stabilization error correction system includes compute incremental component means for computing .increment.Pe, .increment.R, .increment.Ee and .increment.T, wherein Pe is pitch error, Re is roll error, Ee is elevational error and T is time, compute slew rate limit means connected to said compute incremental component means, integrate means connected to said compute slew rate limit means for integrating .increment.Pe, .increment.Re, .increment.Ee and for providing Pe, Re, Ee, and magnitude limit means connected to said integrate means; and

    said signal processor means extracting ground clutter signals from signals received from said transmitter/receiver means and sending said ground clutter signals to said antenna stabilization error correction system.

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