Published 12 issues per year
ISSN Print: 0040-2508
ISSN Online: 1943-6009
Indexed in
An Algorithm for Adaptive Correction of Radar Images
ABSTRACT
Problems are considered of construction of adaptive algorithms for synthesizing of radar images of underlying surface from signals of coherent airborne radar. Algorithm is proposed pertaining to class of self-adjusting algorithms in which information on trajectory errors is extracted directly from reflected signal. Slant-distance averaged estimate of shift of the Doppler-spectrum on synthesizing interval and higher derivatives of the estimate are used as information parameters. This allows to automatically correct images caused by carrier flight-velocity errors and to take into account errors caused by disregarded acceleration and by rate of change of the acceleration. Results are presented of signals processing of coherent synthetic-aperture radar (SAR). Characteristic properties are considered of operation of proposed algorithm under various conditions.