F. H. Raab

Peer Reviewed

Abstract: The coverage and availability offered by the OMEGA radionavigation system make it a natural choice for search and rescue systems that are to operate globally. Effective use of OMEGA signals in these applications requires ambiguity resolution beyond the 132 km lanes provided by the present three frequency format or the 528 km lanes provided by the proposed four frequency format. Additional ambiguity resolution can be provided by a variety of techniques based on information already present in the OMEGA signals, but not used in conventional navigation receivers. These techniques make use of envelope time-of-arrival, signal strength, dispersion, multiple intersection, unique frequencies, and direction of arrival. Use can also be made of other low-frequency signals, including VLF communications, Loran-C envelopes, and sferics. This paper reviews the capabilities and limitations of each technique. On the basis of work done to date, it appears that a combination of techniques can provide complete ambiguity resolution in most situations.
Published in: NAVIGATION: Journal of the Institute of Navigation, Volume 25, Number 4
Pages: 371 - 384
Cite this article: Raab, F. H., "OMEGA AMBIGUITY RESOLUTION TECHNIQUES", NAVIGATION: Journal of The Institute of Navigation, Vol. 25, No. 4, Winter 1978-1979, pp. 371-384.
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