On error controlled computing of the near electromagnetic fields in the shade regions of electrically large 3D objects

Current challenges in evaluation of the near electromagnetic fields in the shadow regions of electrically large objects are discussed. It is shown that traditional low order discretization techniques commonly used for analysis of radiation and scattering problems in the presence of electrically large platforms such as Fast Multipole Method accelerated Rao-Wilton-Glisson Method of Moments are incapable of computing such fields accurately. A roadmap to the solution of this open problem using higher-order boundary element schemes is discussed as well as difficulties associated with them. The Locally Corrected Nystrom method is used for demonstration of higher-order modeling capabilities.