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Title: Automatic compensation of antenna beam roll-off in SAR images.

The effects of a non-uniform antenna beam are sometimes visible in Synthetic Aperture Radar (SAR) images. This might be due to near-range operation, wide scenes, or inadequate antenna pointing accuracy. The effects can be mitigated in the SAR image by fitting very a simple model to the illumination profile and compensating the pixel brightness accordingly, in an automated fashion. This is accomplished without a detailed antenna pattern calibration, and allows for drift in the antenna beam alignments.
Authors:
Publication Date:
OSTI Identifier:
923537
Report Number(s):
SAND2006-2632
TRN: US200806%%297
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Research Org:
Sandia National Laboratories
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; ANTENNAS; ALIGNMENT; BRIGHTNESS; CALIBRATION; RADAR; IMAGE PROCESSING; Resolution (Optics); Antenna arrays.; Antenna radiation patterns.; Synthetic Aperture Radar.