Phaseerror analysis and estimation among different sub-channels in multi-channel space-borne SAR

Synthetic Aperture Radar (SAR) has the ability to work in every hour, under all weather conditions. The multichannel SAR well solved the dilemma between the swath coverage and the azimuth resolution. However in reality, the phase equalization of each sub-channel is influenced by many unideal factors, which can degrade the image quality. In this paper, firstly the main factors are summarized and their effects are calculated. Then the interferometric phase method is introduced to compensate the phase error. Finally we applied the following methods of error estimation and compensation in the channel uncertainty simulation and get a good imagining result.