U.S. flag

An official website of the United States government, Department of Justice.

NCJRS Virtual Library

The Virtual Library houses over 235,000 criminal justice resources, including all known OJP works.
Click here to search the NCJRS Virtual Library

EQUIPMENT SYSTEMS IMPROVEMENT PROGRAM - DEVELOPMENT EVALUATION OF AN AUTOMATIC DIRECTION FINDER FOR HIJACKED TRUCK LOCATION

NCJ Number
19454
Author(s)
N A MAS
Date Published
1973
Length
36 pages
Annotation
THIS STUDY EVALUATES THE EFFICACY OF AN AUTOMATIC DIRECTION FINDER (ADF), TUNED TO COMMERCIAL AM BROADCAST STATIONS, TO LOCATE A HIJACKED TRUCK IN AN URBAN ENVIRONMENT.
Abstract
THE MEASUREMENTS TAKEN WITH THE ADF IN A TEST TRUCK INDICATED THAT THE ERRORS WERE GREATER THAN AN ACCEPTABLE LEVEL. MEASUREMENTS WERE MADE AT SEVENTEEN SITES, WHICH RANGED IN CHARACTER FROM DOWNTOWN, WITH HIGH-RISE BUILDINGS, TO SOME RELATIVELY UNCLUTTERED FLAT AREAS. THE LEVEL OF ERRORS CORRELATED WITH THE COMPLEXITY OF THE ENVIRONMENT AND INDICATED THAT BUILDINGS, POWER LINES, AND OTHER POTENTIAL RERADIATORS STRONGLY INFLUENCE THE ELECTROMAGNETIC FIELD, EVEN AT WAVELENGTHS AS LONG AS 500 METERS. ON THE BASIS OF THESE TESTS, IT IS RECOMMENDED THAT THE USE OF A TRUCK-INSTALLED ADF BE ELIMINATED AS A CANDIDATE FOR HIJACKED TRUCK LOCATION. (AUTHOR ABSTRACT)

Contract Number(s)
F04701-72-C-0073
LEAA-J-IAA-035-2
Sponsoring Agency
US Dept of Justice
Address

Washington, DC 20531, United States

US Dept of the Air Force
Address

Washington, DC 20333, United States

Corporate Author
Aerospace Corporation
Address

2350 East El Segundo Boulevard, El Segundo, CA 90245, United States

Sale Source
National Institute of Justice/
Address

Box 6000, Dept F, Rockville, MD 20849, United States

Publication Type
Statistics
Language
English
Country
United States of America