Review on the pre-study about specific target and rough soil surface composite electromagnetic scattering basing on an efficient numerical strategy

Abstract

Generally, the profile of many surfaces in the nature are of random and rough property, such as, the sea surface, the soil surface, etc., and different scattering characteristics will appear when they are incidented by the electromagnetic wave, which are of considerable value for the domain of remote sensing, radar exploration, etc.. A more complicated case is the composite scattering from the rough sea or soil surface and the target, which have been proved to have special importance about the target recognition. Many important research have been made for both the single rough surface scattering and the target-rough surface composite scattering. For the specific exponential spectrum rough soil surface including environmental factors and target composite electromagnetic scattering issue, the pre-sutdy basing on an efficient hybrid and numerical strategy, i.e., the Propagation-Inside-Layer-Expansion combing with the iterative technique is made by us. The composite sense was modeled. The coupling scattering integral equation was buit. The coupling mechanisms by using the metioned hybrid scheme were formulized. Comparing with the traditional numerical method, the efficiency and accuracy for this method aiming at this specific composite case were analyzed. Furthermore, by using this scheme, several scattering results under many different parameter, such as different target size, different target position, different soil roughness, different soil moisture, different soil temperature, etc., were obtained. The multiple and corresponding relationship between the typical coherent and incoherent scattering characteristics and the coupling interactions from target and rough soil surface are discussed and concluded. This pre-study will make considerable sense to the areas of remote sensing related the actual land and the buried target detection, etc..