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Effects in Omega from Propagation Variations

Published online by Cambridge University Press:  18 January 2010

B. Burgess  and
D. Walker
B. Burgess
Affiliation:
(Royal Aircraft Establishment)
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Extract

This paper discusses some of the variations that occur in the Earth-ionosphere waveguide that can contribute to errors in the Omega lines of position that are used to obtain navigational fixes on a world-wide basis. Effects due to conductivity variations in the Earth's surface, night to day changes in the lower ionosphere, multi-mode propagation, and solar disturbances of the ionosphere are considered and attention is drawn to the use of the multiple frequencies transmitted in the Omega format to overcome some of these sources of error. The paper was presented at a Marine Navigation Symposium held in Sandefjord, Norway, on 24–26 September 1969 and is reproduced with the permission of the organizers. (Crown Copyright, reproduced with the permission of H.M. Stationery Office.)

Type
Research Article
Information
The Journal of Navigation , Volume 23 , Issue 1 , January 1970 , pp. 49 - 59
Copyright
Copyright © Crown Copyright 1970

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References

REFERENCES

1Pierce, J. A. (1965). Omega, I.E.E.E. Trans. Aerospace and Electronics Systems. Vol. AES–1, No. 3, 206–15.Google Scholar
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4Swanson, E. R. Remarks on the propagation of 10·2 kHz electromagnetic waves: The effects of bearing, total magnetic field strength, dip angle of the magnetic field, and ground conductivity (Unpublished report, 1968).Google Scholar
5Pierce, J. A. Private communication.Google Scholar
6Burgess, B. (1969). Propagation effects and lane ambiguity resolution in Omega, Proc. 1EE, 116, 8, 1297.Google Scholar