Time domain simulation of ocean SAR image with wave and wind

We have developed SAR image simulation in time domain for observations of moving sea surface. The simulation aims to obtain SAR images of ocean waves and ocean winds with regard to velocity bunching and Bragg scattering. In order to discuss whether the simulation is based on Bragg scattering, incident angle dependence is simulated from wind waves in the range direction. The simulated SAR signals are good agreement with features of Bragg scattering. Furthermore, velocity bunching modulation due to orbital motions of ocean waves is confirmed in the case of ocean waves with different wave directions. The simulated SAR images show that nonlinearity is strong when ocean waves are travelling to the azimuth direction. It is consistent to the theory of velocity bunching. These simulation results turn out that the time domain simulation can be applied for generating numerical SAR images of ocean waves and ocean winds.