Adaptive Correction of Radartracking Images
A. Ya. Usikov · 2014
The problem of adaptive correction of the trajectory distortions on the images of the earth's surface, which are formed by synthetic-aperture radar (SAR), is discussed. The proposed method belongs to the class of adaptive self-focusing methods, in which the information on trajectory errors is retrieved from a reflected sounding signal. We have used the estimates of the Doppler spectrum displacement and its high derivatives averaged over the slant range as information parameters. It provided an opportunity to build an adaptive algorithm, which can automatically correct not only flight velocity errors, but acceleration and jump errors as well. The results of SAR signal processing are presented. The features of signal processing under different conditions and implementation of the proposed method are discussed.