Nagra Egenskaper i SAR-Radata och SAR-Bilder (Some Characteristics in SAR Raw Data and SAR Images)

摘要

The report describes geometrical and radiometrical characteristics in SAR raw data and SAR images. 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 described. The Doppler rate is estimated from the raw data and the platform trajectory. The status of the SAR software and the new array processor system for SAR signal processing is described finally.