Accession Number : AD0623823

Title :   DEVELOPMENT OF PRECISION VHF OMNIRANGE.

Descriptive Note : Final rept.,

Corporate Author : AIRBORNE INSTRUMENTS LAB DEER PARK NY

Personal Author(s) : Gold, B. ; Hollm, E. ; Lovell, J. ; Mesard, R. ; Zeltser, M.

Report Date : DEC 1964

Pagination or Media Count : 104

Abstract : The Precision VHF Omnirange (PVOR) consists of an International Civil Aviation Organization (ICAO) standard VOR that has been modified to transmit additional precision multilobe bearing information on the same channel. A standard airborne navigation receiver with a PVOR converter automatically resolves the ambiguities of the multilobe signal. An unmodified navigation receiver continues to use only the standard portion of the signal with no degradation in performance. Flight tests of the PVOR combined with a four-loop VOR and with a Doppler VOR indicate an improvement in system accuracy of better than 5 to 1. The overall reduction in siting effects is slightly better than that obtained with a Doppler VOR. The multilobe principle provides a potential 13-fold improvement in instrumentation and monitoring accuracy. The system described is a feasibility model. It is recommended that further effort be expended on an engineering model of a complete system, including monitoring and calibration equipment. (Author)

Descriptors :   *RADIO NAVIGATION, AIR TRAFFIC CONTROL SYSTEMS, VERY HIGH FREQUENCY, DIRECTION FINDING, RANGE FINDING, ANTENNA LOBES, ANTENNA RADIATION PATTERNS, FLIGHT TESTING, AIRCRAFT EQUIPMENT, NAVIGATIONAL AIDS, DOPPLER SYSTEMS, AIRBORNE.

Subject Categories : Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE