Antenna and stabilization console for a VLF relative navigational system
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Authors
Roeder, Bernard Franklin, Jr.
Subjects
Crossed loop antenna
Cardiod radiation pattern
VLF relative navigation
Phase delay
Diurnal shift
Goniometer
Azimuth stabililzation
VLF propagation
Cardiod radiation pattern
VLF relative navigation
Phase delay
Diurnal shift
Goniometer
Azimuth stabililzation
VLF propagation
Advisors
Menneken, Carl E.
Date of Issue
1969-04
Date
April 1969
Publisher
Monterey, California. U.S. Naval Postgraduate School
Language
en_US
Abstract
A VLF relative navigational system makes use of the fact that, at any given point on the earth, phase delay of a received VLF signal is highly stable and predictable. As the receiver is physically moved, phase delay changes linearly with distance from the transmitting station, so that by keeping track of the phase delay of the received signal from several VLF stations, an accurate plot of geographical position is maintained. The paper outlines the development of a relatively simple antenna system, composed of two crossed loops and a whip sense antenna to produce a cardiod shaped radiation pattern, which effectively discriminates against the long-way-around-the world contamination on the short path signal. A means is also devised for electronically rotating the fixed antenna by means of a goniometer which may be stabilized in azimuth by an input from a ship's gyrocompass
Type
Thesis
Description
Series/Report No
Department
Department of Electrical Engineering
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
71 p.: ill.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.