Statistical realisation of CWMFSM for scattering simulation of space-time varying sea surface

Abstract

ABSTRACTWith the increasing demands of large maritime scene scattering prediction and also its high-resolution imaging simulation, the traditional two-scale scattering models, such as capillary wave modified facet scattering model (CWMFSM), appear to be inefficient and laborious when encountering scattering simulation of large maritime scene or long-time case. This paper proposes an effective and efficient approach, i.e. a statistical realisation of CWMFSM, for scattering simulation of space-time varying sea surface. Namely, this approach can give a fast and accurate simulation of large scene and long-time space–time varying sea surface scattering results using the memoryless non-linear transform method together with the statistic characteristics of results calculated by CWMFSM method. From the comparisons of texture feature, statistical characteristics and Doppler spectrum between the results derived from CWMFSM method and the statistical realisation, it is demonstrated that the proposed approach can give a pretty efficient simulation of space-time varying sea surface scattering with almost the same accuracy as the CWMFSM method itself. Similar with CWMFSM, the proposed approach can be applied to fields of sea surface scattering intensity distribution simulation, Doppler spectrum investigation of dynamic sea surface, composite scattering prediction of sea surface with multiple targets, SAR remote-sensing simulation of maritime scene, etc.