Analysis of Attitude and Altitude error effects of SAR sensor on Doppler Centroid Frequency

Synthetic Aperture Radar (SAR), which has been widely used for earth remote sensing, provides high resolution and day-and-night and weather-independent images for a multitude of applications. Design of SAR sensors has had some considerations for SAR systems issues such as microwave currents propagation, antenna, orbit design and etc.. Altitude and attitude errors of SAR sensor have a direct effect on Doppler centroid frequency. To avoid this effect, error of Doppler centroid frequency should be smaller than half of the Pulse Repetition Frequency (PRF). With analysis of standard deviation of Doppler centroid frequency, Maximum acceptable errors will be available to avoid ambiguity in Doppler centroid frequency. In this paper, as a novel approach, maximum acceptable errors behavior is analyzed and discussed comprehensively based on error propagation law beside their relations to minimum available Antenna area in order for optimum design of sensor.