AN ANALYTICAL PRESENTATION OF THE MONOCHROMATIC OCEAN WAVE IMAGE BY AREGULAR OR AN INTERFEROMETRIC SYNTHETIC-APERTURE RADAR

An asymptotic expansion of the theoretical model for simulation of a m onochromatic ocean wave imaging by either regular synthetic aperture r adar (SAR), or bg along-track interferometric SAR (INSAR), and its ana lytical approximation are considered. The model takes into account the so-called velocity bunching imaging mechanism. The domains of validit y of the simplified asymptotic and analytical expressions for both SAR and INSAR imaging of the ocean waves are established by comparing tho se solutions with the corresponding full numerical simulations. The an alytical presentations of the SAR and the INSAR wave imaging obtained in the present study are used to understand better the limitations and the relative advantages of both techniques and to define the dimensio nless parameters which govern the imaging process.