Shallow Sea Topography Imaging Model by Along-track Interferometric SAR and Its Optimal Radar Parameters Analysis
顺轨干涉SAR浅海地形成像建模及其最优雷达观测参数分析

In this paper, a simulation model of shallow sea topography imaging by Along-Track Interferometric SAR (ATI-SAR) is developed based on shallow sea current dynamical model, wave-current interaction model, backscattering model and Doppler spectrum model. This simulation model is used to study the influence of radar parameters (frequency, incidence angle, baseline length and polarization) on shallow sea topography imaging by ATI-SAR under quasi-one-dimension condition. The simulation results indicate that high frequency, large incidence angle and long along-track baseline are favorable to shallow sea topography imaging by ATI-SAR when the imaging time lag between two antennas is shorter than the de-correlation time of the sea. Considering the influence of Signal-to-Noise Ratio (SNR), VV is a favorable polarization for shallow sea topography imaging, though the ATI phase may be not sensitive to the polarization.