Abstract:

This paper presents a strategy of beam pointing steering for high resolution sliding spotlight synthetic aperture radar by satellite attitude maneuver. The strategy developes the traditional geometry of sliding spotlight mode(SSM) with moderate azimuth resolution. To solve imaging time and attitude variation of SSM, it conceives that the stare point position of antenna beam in high resolution SSM is moving along azimuth time, and that the variation of Doppler center along range direction should be minimized. In the strategy, beam pointing steering is realized by threeaxis attitude maneuver, escaping from the scene bending phenomenon by one or twoaxis maneuver in large squint angle geometry, which is suitable for high resolution SSM. The efficiency and accuracy is validated by both satellite tool kit and echo simulations in Matlab.