×

Inverse precision velocity update for monopulse calibration

  • US 6,853,330 B1
  • Filed: 05/13/2004
  • Issued: 02/08/2005
  • Est. Priority Date: 05/13/2004
  • Status: Active Grant
First Claim
Patent Images

1. A method for estimating an actual boresight of a radar monopulse antenna mounted on a moving platform from Σ

  • data and Δ

    data generated with respect to a calibrated boresight of said monopulse antenna, said Σ

    data generated from a Σ

    channel, said Δ

    data generated from a Δ

    channel, said monopulse antenna coupled to a ground position measuring system, said ground positioning measuring system reporting a position of said monopulse antenna with respect to a reference and a velocity with respect to said reference, said method comprising the steps of;

    acquiring a Σ

    synthetic aperture map of a radar scattering location, using said Σ

    channel of said monopulse antenna with respect to said calibrated boresight, said radar scattering location centered about said calibrated boresight, said Σ

    synthetic aperture map formed from Σ

    data;

    acquiring a Δ

    synthetic aperture map of said radar scattering location using said Δ

    channel of said monopulse antenna with respect to said calibrated boresight, said Δ

    synthetic aperture map formed from a data;

    is motion compensating said Σ

    data with respect to said reference using said position and said velocity to obtain aligned Σ

    pixels;

    motion compensating said Δ

    data with respect to said reference using said position and said velocity to obtain aligned Δ

    pixels, each of said aligned Δ

    pixels matched to corresponding said aligned Σ

    pixels obtained from said radar scattering location;

    forming a ratio of said aligned Δ

    pixels to said aligned Σ

    pixels for each of a plurality of said aligned Σ

    pixels located near said calibrated boresight;

    identifying the location of said actual boresight of said monopulse antenna by an analysis of said ratio for a plurality of said aligned Σ

    pixels and corresponding said aligned Δ

    pixels over said radar scattering location.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×