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NCJ Number: 30980 Find in a Library
Title: DEVELOPMENT OF A POLICE HELICOPTER DF (DIRECTION FINDING) - HOMING SYSTEM (FROM CARNAHAN CONFERENCE ON ELECTRONIC CRIME COUNTERMEASURES, 1971 - PROCEEDINGS SEE NCJ-02891)
Author(s): R P K WALLA; S G BACON
Corporate Author: University of Kentucky
United States of America
Date Published: 1971
Page Count: 23
Sponsoring Agency: Kentucky Cmssn on Law Enforcement and Crime Prevention
Frankfort, KY 40601
University of Kentucky
Lexington, KY 40506
Format: Document
Language: English
Country: United States of America
Annotation: DISCUSSION OF THE DESIGN, TEST, AND EVALUATION OF A HELICOPTER HOMING SYSTEM SUITABLE FOR DIRECTION FINDING (DF) AND UTILIZING EXISTING POLICE VHF (VERY HIGH FREQUENCY) TRANSCEIVERS.
Abstract: SYSTEM APPLICATIONS INCLUDE SURVEILLANCE, VEHICLE LOCATION, NAVIGATING AID, AND POLICE JAMMING LOCATOR. VARIOUS DF AND HOMING TECHNIQUES WERE INVESTIGATED USING SEVERAL ANTANNA SYSTEMS AND DETECTION SCHEMES. FIELD TESTS CONDUCTED IN LOS ANGELES REVEALED THAT OPTIMUM PERFORMANCE WAS OBTAINED USING A LOOP ANTENNA AND THE RADIOMETRIC DETECTION PROCESS. USING THIS TECHNIQUE, HOMING CAPABILITY WAS OBTAINED FOR RANGES IN EXCESS OF 35 MILES AND FOR A RADIATED POWER OF APPROXIMATELY 1 WATT.
Index Term(s): Antennas; Helicopters; Police equipment; Police radio frequencies
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http://www.ncjrs.gov/App/publications/abstract.aspx?ID=30980

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