Spotlight Synthetic Aperture Radar

Spotlight Synthetic Aperture Radar

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The goal of a synthetic aperture radar is to observe a scene over a series of spatial sampling points and coherently combine those samples to synthesize a much larger aperture with finer azimuth resolution. The scene is persistently illuminated by the real beam of the antenna, and each spatial sampling point provides a range-resolved profile. Phase changes between profiles due to Doppler are exploited in Synthetic Aperture Radar processing to reconstruct a two (2-D) or three-dimensional (3-D) representation of the sampled scene.

Chapter Contents:

  • 10.1 Bistatic Phase History Data
  • 10.2 Image Resolution
  • 10.3 Frequency Sample Data Collection
  • 10.4 Bistatic SAR Image Formation
  • 10.5 Motion Measurement Errors
  • 10.6 Autofocus
  • 10.7 Three-Dimensional Surface Reconstruction
  • 10.8 Properties of Bistatic SAR Images
  • References

Inspec keywords: radar resolution; radar imaging; image representation; radar antennas; image reconstruction; image sampling; synthetic aperture radar

Other keywords: synthetic aperture radar; 3D representation reconstruction; spatial sampling points; 2D representation reconstruction; range-resolved profile; image resolution; phase change; azimuth resolution; Doppler; antenna beam

Subjects: Optical, image and video signal processing; Radar equipment, systems and applications; Single antennas

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