| Boresight Error (BSE), defined as the angular deviation between the true position and the apparent position of a target as indicated by a radar, is a very important figure of merit for a tracking radar. The ability to accurately predict BSE in the design phase of a new radar system or to impact modifications of an existing system is imperative. This research undertakes a thorough and comprehensive investigation of BSE using a systems concept so that the final product is applicable to a variety of situations.;Although there are many factors intrinsic and extrinsic to a radar system that give rise to BSE, the most significant contributor is the protective radome. Surface integration and Geometric Optics (GO) are two methods commonly used to investigate the effects of a radome on BSE. This research effort employed a GO technique which expanded previous ray-trace receive techniques to include: (1) a uniquely defined/developed mathematical description for each surface within arbitrary multi-layer tapered radomes, (2) an "ideal" taper function concept for obtaining optimum BSE prediction performance, (3) a generalized technique for calculating specular reflection points within the radome, and (4) the total refractive effects along ray propagation paths. Fortran computer model results were compared with limiting case data (BSE = 0... |
