A simulation model of SAR imaging of shallow water bathymetry has been developed based on SAR imaging mechanism of shallow water bathymetry and the microwave radar imaging of oceanic surface’s program of M4S.This simulation model improves the drawback of the traditional simulation model

which just only simulated alternant dark bright streaks

and both streaks have almost the same relative radar backscatter

but could not simulate streaks in the form of dark streaks or bright streaks respectively.However

above three expressions appear in shallow water bathymetry SAR images imaging at the same area and the same local time in each one day.As far as we known

SAR can’t image shallow water bathymetry features directly.It images the bathymetry via surface effects induced by tidal currents flow variation over bottom topography under favorable currents and sea surface winds

thus the form of shallow water bathymetry SAR images has close relationship with hydrological and meteorological conditions.Herein

we give the SAR simulation process of shallow water bathymetry according to SAR imaging mechanism of shallow water bathymetry

and make use of this improved simulation model

carry out the simulation study on the effect of wind on SAR imaging of shallow water bathymetry.Also the relationship between the sea surface wind and SAR imaging of shallow water bathymetry has been analyzed using both the results of the simulation and the analysis of shallow water bathymetry SAR images.According to these results

the relationship between the sea surface winds and SAR imaging of shallow water bathymetry has been strengthened

which shows that

under lower wind speed

the SAR backscattering cross section of the sea surface of shallow water bathymetry is darker

vice versa.The relative intensity of the bright and dark streaks is also affected by the wind speed but is not the main factor.The effect of wind direction on SAR imaging of shallow water bathymetry is more important.When the wind direction is adverse or to parallel the direction of currents component in direction of shallow water bathymetry

the SAR backscattering cross section of the sea surface is brighter

bright streaks and dark streaks appear on SAR images respectively.Under crosswind

the SAR backscattering cross section of the sea surface is darker

the bright and dark streaks are alternant

and the adverse wind direction is better for SAR imaging of shallow water bathymetry.In this study

we fully analyze the expression of shallow water bathymetry SAR images under different sea surface wind speeds and directions

which is an necessary step for extracting quantitative information of shallow water bathymetry form SAR images.