Phase and amplitude histories model adapted to the spaceborne SAR survey

A model of relative movement of a SAR platform and imaged footprint is proposed. The model has been specially adapted to conditions of a spaceborne SAR survey. The main difference of this model from that used before is that it takes into account the SAR platform movement and Earth rotation in addition to commonly used calculations of satellite motion in the disturbed Earth gravitation field. It is shown that SAR motion could be considered as linear, but with velocity derived from orbital motion parameters. The proposed model could be easily applied to analysis of SAR processing algorithms and the influence of the orbit parameter estimation errors on the resulting image quality. Use of the model simplifies the parameter estimation of the SAR sensors intended for planetary investigations.