Some characteristics in synthetic aperture radar (SAR) raw data and SAR images
Abstract
Geometrical and radiometrical characteristics in synthetic aperture radar (SAR) raw data and SAR images are described. The major contributions to distortions in SAR images are Earth rotation and antenna pointing errors. Two effects from this are a range migration and an offset Doppler spectrum centroid. Estimation of the Doppler centroid and methods for correction of the distortions are outlined. The Doppler rate is estimated from the raw data and the platform trajectory. The status of the SAR software and of an array processor system for SAR signal processing is reviewed.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- February 1988
- Bibcode:
- 1988STIN...8828232B
- Keywords:
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- Geometric Rectification (Imagery);
- Radar Data;
- Radar Imagery;
- Radiometric Correction;
- Synthetic Aperture Radar;
- Doppler Effect;
- Earth Rotation;
- Radar Antennas;
- Communications and Radar