A Coherent Multilayer Simulator of Radargrams Acquired by Radar Sounder Instruments

摘要: Reliable electromagnetic simulators are of prime importance for the design radar sounder instruments and supporting subsequent analysis their data. In this paper, we present a coherent, facet method-based simulator that can compute echoes from subsurface target area with an arbitrary number geological layers, thus going beyond surface-only or two-layer descriptions so far implemented in coherent ray-tracing simulators. Propagation fields throughout is computed according to Snell’s law following approach. For each ray interacting surface, be it direct reflection refracted coming subsurface, phase contribution calculated through linear approximation, while total field received at antenna using Huygen’s principle. Validation simulations have been performed against data lunar martian areas characterized by multilayer nature collected Lunar Radar Sounder instrument JAXA’s Kaguya probe Shallow onboard NASA’s Mars Reconnaissance Orbiter, respectively. Results confirm effectiveness proposed simulator.