Accession Number : AD0869356

Title :   LITPARS (Litton Passive Ranging System) System Development Program (Phase II). Coplanar (Sub-vs-Sub, 2 Dimensional), Angular Measurements Only Solution.

Descriptive Note : Final engineering rept. Feb 69-Mar 70,

Corporate Author : LITTON SYSTEMS INC WOODLAND HILLS CA GUIDANCE AND CONTROL SYSTEMS DIV

Personal Author(s) : Post, Joseph

Report Date : MAR 1970

Pagination or Media Count : 183

Abstract : This report documents the investigation conducted by Litton Guidance and Control Division, on the effects natural contamination of angular measurements employed by LITPARS equations, would have on the accuracy of computing a range to target and target course and speed. Included in this study are the true values obtained when LITPARS equations are utilized with accurate data, and the results obtained when various smoothing techniques and devices, developed during this study were employed to improve the accuracies of the LITPARS solution. The results obtained indicate that the methods herein displayed, when employed with various maneuvers, will yield extremely accurate computations of range and target velocity. (Author)

Descriptors :   (*SONAR EQUIPMENT, PASSIVE SYSTEMS), (*SONAR SIGNALS, SOUND RANGING), UNDERWATER SOUND SIGNALS, ANTISUBMARINE WARFARE, SUBMARINES, UNDERWATER TRACKING, SONAR SOUND ANALYZERS, COMPUTER PROGRAMS, LEAST SQUARES METHOD, DIFFERENTIAL EQUATIONS, POLYNOMIALS, ECHO RANGING, ERRORS, UNDERWATER OBJECTS, RANGE(DISTANCE), VELOCITY.

Subject Categories : Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE