Variations in Omega Propagation Parameters.

The dependence of first-mode propagation parameters on ground conductivity and the terrestrial magnetic field is investigated for frequencies within the spectrum of the Omega Navigation System, 10.2-13.6 kHz. The parameters are shown to exhibit gradual, monotonic variation with conductivity througho...

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Bibliographic Details
Main Authors: Gallenberger, R. J., Swanson, E. R.
Other Authors: NAVAL ELECTRONICS LAB CENTER SAN DIEGO CA
Format: Text
Language:English
Published: 1971
Subjects:
Navigation and Guidance
*HYPERBOLIC NAVIGATION
*OMEGA NAVIGATION
RADIO TRANSMISSION
ARCTIC REGIONS
PREDICTIONS
GEOMAGNETISM
VERY LOW FREQUENCY
OMEGA NAVIGATION SYSTEM
Arctic
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0747636
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0747636
Description
Summary:The dependence of first-mode propagation parameters on ground conductivity and the terrestrial magnetic field is investigated for frequencies within the spectrum of the Omega Navigation System, 10.2-13.6 kHz. The parameters are shown to exhibit gradual, monotonic variation with conductivity throughout the range of normal ground conductivities, and to present no special problem for propagation predictions. For very low conductivity ground, however, modal parameters show a complicated dependence on conductivity, and accurate predictions of propagation over permafrost and ice may therefore be difficult. (Author)

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