ADAPTIVE CORRECTION OF RADAR TRACKING IMAGES

 O. V. Sytnik

O.Ya. Usikov Institute for Radiophysics and Electronics of National Academy of Sciences of Ukraine

 

The paper is received on September 20, 2013
 

Abstract. The problem of adaptive correction the trajectory distortions on the images of earth surface, which formed by a synthetic-aperture radar (SAR), is discussed. The proposed method belongs to the class of adaptive self- focusing methods, in which the information about trajectory errors retrieves from reflected sounding signal. As information parameter we used the estimates of the Doppler’s spectra displacement averaged through slant range. To estimate the phase in a supporting function during the SAR maneuvering has used the higher derivatives on the instantaneous slant range. It gave the opportunity to build the adaptive algorithm which could automatically correct not only flight velocity errors, but the acceleration and jump errors too. The results of SAR’s signal processing are presented. The features of signals processing in different conditions and implementation of proposed method are discussed. Fig.: 11. Ref.: 12 pos.

Keywords: Coherent Radar, Doppler Spectra, Distortions, trajectory errors, Radar’s Image of Surface, Synthetic Aperture Radar (SAR).