Accession Number : ADA316575

Title :   BiRASP - The Bistatic Range-Dependent Active System Performance Prediction Model.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC ACOUSTICS SYSTEMS BRANCH

Personal Author(s) : Fromm, David M. ; Crockett, John P. ; Palmer, L. B.

PDF Url : ADA316575

Report Date : 30 SEP 1996

Pagination or Media Count : 99

Abstract : In 1992, the Naval Research Laboratory (NRL) published a report describing the Range-dependent Active System Performance (RASP) prediction model; a sequence of computer programs using multipath propagation and scattering processes to predict the long-range, low-frequency boundary reverberation, and target returns that would be received in real ocean environments. That computer model has been extended to admit arbitrary source/receiver configurations within a three-dimensional, range-dependent environment. The enhancements include: (1) range and azimuthal dependence in all environmental parameters, (2) volume scattering and bistatic scattering strength functions, (3) realistic source and receiver characteristics (e.g., three-dimensional beam patterns for linear arrays and array tilt), and (4) calculation of target returns with time/angle spreading. In addition to addressing the prediction and evaluation of active sonar systems in real ocean environments, the set of programs that comprise the Bistatic Range-dependent Active System Performance (BiRASP) prediction model also produce the detailed, high-resolution results required for basic theoretic and experimental acoustic research. This report presents the theoretical foundations of the BiRASP model and the corresponding numerical implementation of this theory. Further, a detailed description of the model software, instructions for execution, and sample results are provided.

Descriptors :   *BISTATIC RADAR, COMPUTER PROGRAMS, COMPUTERIZED SIMULATION, COMPUTATIONS, PREDICTIONS, THEORY, ELECTROMAGNETIC SCATTERING, HIGH RESOLUTION, THREE DIMENSIONAL, CONFIGURATIONS, LINEAR ARRAYS, RADAR TARGETS, AZIMUTH, RAY TRACING, REVERBERATION, OCEAN ENVIRONMENTS, SONAR, TRANSMISSION LOSS, MULTIPATH TRANSMISSION, RADIATION PATTERNS.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE