Electromagnetic Scattering Effects of Sea on the Radar Cross Section (RCS) of Small Boats in Littoral and Deep Ocean Environments.

HyPerComp, Inc. in collaboration with Professor Patrick Lynett of Texas A & M University is developing a comprehensive approach to providing realistic geometric models for small craft moving in a littoral environment, including representations for the sea surface, suitable for use in computing radar returns from the combined surfaces using currently available electromagnetic solvers. In this effort, we are developing a geometry/gridding interface that utilizes the output of Prof. Lynett's COULWAVE software, which generates time-dependent sea surfaces representative of both shallow and deep-water conditions, in combination with HyPerComp's sophisticated gridding tools, to provide complete surface-patch representations for the target environment. In addition to this gridding effort, HyPerComp is also adapting its broadband electromagnetics solver, TEMPUS, to compute the normalized radar return (NRCS) from sea state environment. In the Phase II effort, the end goal is to advance the state of the art in these areas to provide user-friendly, turn key computing platforms for routine computation of physics-based, accurate, full wave solutions for Navy objects of interest at greatly reduced computational run times over current practice.