1. This work was supported by the THAAD Project Office and the Systems Engineering Technical Assistance (SETA) contractor, Dynetics, Inc., Contract Number DASG60-96-C-0 193, Gregory Stolt, Program Manager. The grant of high priority computer time was allocated through a recently completed DOD Challenge Project under the DOD HPC Modernization Program. The computer simulations were performed on the Cray T90 at the Naval Oceanographic Office (NAVO), Stennis Space Center, MS and the 128 processor SGI origin 2000 at the U.S. Army Space and Missile Defense Command (Simulation Center), Huntsville, AL. Additional scientific visualization services were provided by NAVO, the ARL MSRC, Aberdeen, MD and Intelligent Light, Lyndhurst, NJ.