Cover: On the Accuracy Analysis of Airborne Techniques for Passively Locating Electromagnetic Emitters

On the Accuracy Analysis of Airborne Techniques for Passively Locating Electromagnetic Emitters

Published 1971

by Louis H. Wegner

Download

Download eBook for Free

FormatFile SizeNotes
PDF file 1.9 MB

Use Adobe Acrobat Reader version 10 or higher for the best experience.

Purchase

Purchase Print Copy

 Format Price
Add to Cart Paperback80 pages $25.00

Discussion of methods of locating electromagnetic emitters from airborne electronic reconnaissance systems, using passive measurements on the electromagnetic waves of the emitter taken from several locations. Measurements for finding the emitter may be either the direction of arrival at 2 or more locations along the aircraft's flight path for single-aircraft DF (direction-finding) systems, or the relative time of arrival of emitter pulses at the different aircraft locations for 3-aircraft TOA (time-of-arrival) systems. Emitter location accuracy is a function of the accuracy of these indirect measurements of the emitter location and the estimation procedure used to combine the accuracies of various measurements of location and bearing. A general expression is derived for a lower bound to the covariance matrix of the unbiased estimates of emitter location coordinates (and consequently the location CEP), using the Cramer-Rao inequality. Examples illustrate the application of the Cramer-Rao lower bound to the emitter CEP for both DF and TOA systems.

This report is part of the RAND report series. The report was a product of RAND from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit www.rand.org/pubs/permissions.

RAND is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.