Inverting for Maritime Environments Using Proper Orthogonal Bases From Sparsely Sampled Electromagnetic Propagation Data

Predicting in situ maritime electromagnetic (EM) propagation conditions is of great importance to radar operations within the marine atmospheric boundary layer. To characterize the EM propagation conditions, at a specific location in time and space, the current research constructs (offline) a library of sparsely sampled EM coverage data, expressed as proper orthogonal modes, so as to enable the solution of an inverse problem for the current EM propagation conditions (online). The online inversion is effected within a context that exploits an implied differential geometric structure associated with the manifold containing the proper orthogonal mode library entries.