EVALUATION OF REAL-TIME ALGORITHMS FOR OMEGA PROPAGATION PREDICTION

A. N. Beavers, Jr., D. E. Gentry and J. F. Kasper, Jr.

Peer Reviewed

Abstract: Published Omega Predicted Propagation Corrections (PPC’s) are generally recognized as providing the most accurate means of correcting received OMEGA signals. However, computation of the published PPC’s involves use of two sophisticated computer routines - one involving extensive propagation physics modeling, the other is a complex mathematical adjustment requiring online access to a large data base. Real-time implementation of these routines in shipboard or airboime computers is not practical and thus, a number of algorithms have been developed in an attempt to obtain correction values which closely match published PPC’s, yet impose a considerably less severe computer burden. In this paper, various of these algorithms - including functional approximations and simplified propagation physics models - are evaluated in terms of their accuracy relative to published PPC’s and their relative computer burdens. The propagation models used in the PPC computation process are briefly examined in order to highlight areas of possible simplification for real-time applications.
Published in: NAVIGATION, Journal of the Institute of Navigation, Volume 22, Number 3
Pages: 252 - 258
Cite this article: Beavers, A. N., Jr.,, Gentry, D. E., Kasper, J. F., Jr.,, "EVALUATION OF REAL-TIME ALGORITHMS FOR OMEGA PROPAGATION PREDICTION", NAVIGATION, Journal of The Institute of Navigation, Vol. 22, No. 3, Fall 1975, pp. 252-258.
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