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Simultaneous triple aperture radar

  • US 4,825,213 A
  • Filed: 01/12/1987
  • Issued: 04/25/1989
  • Est. Priority Date: 05/15/1981
  • Status: Expired due to Term
First Claim
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1. An airborne simultaneous triple synthetic aperture radar system comprising:

  • first, second and third antenna means linearly spaced on an aircraft, each of said antenna means being electrically connected to a dedicated receive channel processor,first, second and third frequency filter means in electrical communication with said first, second and third antenna means, respectively,means for phase shifting the output of said first filter means to effect clutter coincidence with the output of said second filter means,means for phase shifting the output of said second filter means to effect clutter coincidence with the output of said third filter means,signal reduction means for combining clutter coincided filter outputs to derive a residual signal from each pair of clutter coincided signals,signal addition means for combining the two residual signals so obtained,signal comparison means for comparing the combined residual signals to a threshold and generating a moving target detection indicator signal,signal comparison means adapted to determine phase relationships between residual signals to define the electrical phase angle between them, anddata processing means for deriving the doppler position and angle off boresight of the moving target.

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