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Title: 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:
Sandia National Lab. (SNL-NM), 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 (10)

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SAR image-formation algorithm that compensates for the spatially variant effects of antenna motion
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conference June 1994
Adaptive Two Dimensional Shading For Batch Synthetic Aperture Radar Using Phased Array Antenna patent April 1991
Radiometric corrections and calibration of SAR images
  • Frulla, L. A.; Milovich, J. A.; Karszenbaum, H.
  • IGARSS '98. Sensing and Managing the Environment. 1998 IEEE International Geoscience and Remote Sensing. Symposium Proceedings. (Cat. No.98CH36174) https://doi.org/10.1109/IGARSS.1998.699700
conference January 1998
A SAR imaging model for large-scale atmospheric inhomogeneities conference August 2004
Method for extracting motion errors of a platform carrying a coherent imaging radar system from the raw radar data and device for executing the method patent November 1992
Estimating the Doppler centroid of SAR data journal March 1989
Method of correcting for errors in radar imaging patent September 1988
Antenna-pattern correction for near-field-to-far field RCS transformation of 1D linear SAR measurements journal August 2004

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