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Synthetic aperture radar simulation

  • US 5,680,138 A
  • Filed: 12/15/1995
  • Issued: 10/21/1997
  • Est. Priority Date: 12/15/1995
  • Status: Expired due to Term
First Claim
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1. A method of simulating a synthetic aperture radar comprising defining terrain strips corresponding to radar signals received from a simulated SAR platform, representing in a memory of a computer terrain elevations distributed at regular intervals along said terrain strips wherein said terrain strips are divided into terrain segments between points of terrain elevation, determining with said computer where said points of terrain elevation project into an illumination plane perpendicular to the direction of a simulated SAR radar signal transmitted by said simulated SAR platform, determining with said computer where said elevation points project into an image plane perpendicular to said illumination plane thereby determining the projection of said terrain segments into said image plane, determining with said computer a brightness of illumination value for terrain segments extending between said terrain elevation points corresponding to the separation of the corresponding points projected into said illumination plane, dividing said image plane into incremental pixel areas, providing an accumulation register having storage locations corresponding to the incremental pixel areas of said image plane, adding brightness values to the storage locations of said accumulation register wherein each brightness value accumulated in a given storage location corresponds to a terrain strip and is determined from the product of the brightness of illumination of such terrain strip times the amount that the projection of such terrain strip overlaps the incremental pixel area of said image plane corresponding to such storage location.

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