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Mitigating illumination gradients in a SAR image based on the image data and antenna beam pattern

Patent ·
OSTI ID:1083590

Illumination gradients in a synthetic aperture radar (SAR) image of a target can be mitigated by determining a correction for pixel values associated with the SAR image. This correction is determined based on information indicative of a beam pattern used by a SAR antenna apparatus to illuminate the target, and also based on the pixel values associated with the SAR image. The correction is applied to the pixel values associated with the SAR image to produce corrected pixel values that define a corrected SAR image.

Research Organization:
SNL-A (Sandia National Laboratories, Albuquerque, NM (United States))
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
8,427,358
Application Number:
11/566,531
OSTI ID:
1083590
Country of Publication:
United States
Language:
English

References (7)

Robust Doppler Centroid estimate for ERS and ENVISAT conference January 2003
Radiometric corrections and calibration of SAR images
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conference January 1998
A SAR imaging model for large-scale atmospheric inhomogeneities conference August 2004
Antenna-pattern correction for near-field-to-far field RCS transformation of 1D linear SAR measurements journal August 2004
X-SAR radiometric calibration and data quality journal July 1995
SAR image-formation algorithm that compensates for the spatially variant effects of antenna motion
  • Burns, Bryan L.; Cordaro, J. Thomas
  • SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, SPIE Proceedings https://doi.org/10.1117/12.177178
conference June 1994
Estimating the Doppler centroid of SAR data journal March 1989

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