Approved for public release; distribution unlimited. / A VLF relative navigation 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, one may keep an accurate plot of
geographical position. Two problems experienced in measuring phase delay are the diurnal
shift and long path interference. An investigation is made into a
method of predicting the diurnal phase shift and the resultant phase
due to simultaneous reception of long and short path signals. Also
investigated is a receiving antenna having a cardioid shaped radiation
pattern which could provide discrimination against long path
signals.
| Identifer | oai:union.ndltd.org:nps.edu/oai:calhoun.nps.edu:10945/9550 |
| Date | 12 1900 |
| Creators | McKay, John Douglas., Preston, Gerry Lee. |
| Contributors | Menneken, C.E. |
| Publisher | Monterey, California ; Naval Postgraduate School |
| Source Sets | Naval Postgraduate School |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
| 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. |
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