Abstract:Height measurement accuracy is an important parameter in the InSAR system design, and phase error is one of factors having effect on height measurement accuracy. In this paper the effect of the SAR system amplitude and phase errors, frequency modulation ratio error on target phase errors is analyzed and derived. To quantitatively simulate the effect of errors on height measurement accuracy, this paper presents a method which can obtain the interferometric phase, and target DEM. Phase errors and height measurement errors can be obtained easily. This method can avoid the difficulties of quantitative analysis in the distributed targets simulation. Finally, the effect of different errors on height measurement accuracy is simulated, and some experimental results, which can supply to system design, are presented.