Raw data generation of SAR simulation using scanline method

SAR simulation tool is useful for the design and implementation of SAR systems. The effects of varying system parameters may be easily investigated through simulation. Raw signal generation of SAR embodies the distributed surface model, layover, shadow and scattering mechanism. We use the facet model to have the normal vector toward the space from earth. It gives us incident angles of the objects, which provides reflectivity of whole scene. We also detect layover, shadow area by using the nominal collection look/azimuth angle form, which is derived from the distributed surface model.