Wave Propagation between Earth and Ionosphere Taking into Account Different Regions of Ground Conductivity and a Variable Height of the Ionosphere.

It has been reported that VLF signals are sometimes damped severely when crossing the ice of Greenland under day light conditions. This anomalous attenuation occurs simultaneously with a strong proton flux coming from the sun which is known to increase the ionization of the D-layer. In order to find...

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Bibliographic Details
Main Author: Ledinegg,Ernst
Other Authors: TECHNISCHE HOCHSCHULE GRAZ (AUSTRIA) INSTITUT FUER RHEORETISCHE PHYSIK UND REAKTORPHYSIK
Format: Text
Language:English
Published: 1972
Subjects:
Radiofrequency Wave Propagation
(*RADIO TRANSMISSION
SURFACE TO AIR)
(*RADIOFREQUENCY INTERFERENCE
VERY LOW FREQUENCY)
MATHEMATICAL MODELS
ATTENUATION
IONOSPHERE
GREENLAND
ICE
ELECTROMAGNETIC FIELDS
AUSTRIA
Greenland
Online Access:http://www.dtic.mil/docs/citations/AD0746636
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0746636
Description
Summary:It has been reported that VLF signals are sometimes damped severely when crossing the ice of Greenland under day light conditions. This anomalous attenuation occurs simultaneously with a strong proton flux coming from the sun which is known to increase the ionization of the D-layer. In order to find a theoretical explanation of this effect, in the First Year Technical Report the propagation of the field of an electric dipole between earth and ionosphere is investigated. The model proposed consists of a spherical wave guide; the surface conductivity of the inner sphere corresponds to that of sea water except for a trapezoidal domain covered by ice, while the outer surface corresponds to the boundary of the ionosphere. (Author)

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