Analysis on the effects of deceived jamming on  the co-registration of INSAR imaging

Interferometric Synthetic Aperture Radar (INSAR) altimetry technique is using a pair of SAR images to obtain the elevation information of the observation region. Its accuracy is closely linked to the correlation between the SAR images. The correlation between the disturbed SAR images will be changed, which will directly affect the InSAR imaging results. Firstly, the paper has described the principle of the interrupted sampling repeater jamming and the rebound jamming and then, the effects of the jamming on the echo phase of the master and the slave antennas are researched. Secondly, it has simulated co-registration processing between a pair of complex SAR images under the different deception jamming conditions. Then the effects of the deception jamming on the co-registration processing are analyzed according to the characteristics of the correlation coefficient and the quality of the interference pattern. Last，The paper has concluded that the interrupted-sampling jamming can make the correlation between the SAR images worse, and the SAR images maintain the high coherence under the rebound jamming but the elevation information represented by the new interference pattern is very different from the real one, that is to say, compared with the interrupted-sampling repeater jamming, the rebound jamming has more deception effects on the InSAR.