MEASUREMENTS OF THE EARTH-IONOSPHERIC CAVITY RESONANCE FREQUENCIES AT HIGH LATITUDE

The earth-ionospheric cavity resonance frequencies were measured by two methods somewhat different from that employed hitherto by other workers. The instruments used were all battery-operated. The recordings have been carried out close to Isfjord Radio, Spitzbergen (geographic latitude 78 deg 03.9 m...

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Bibliographic Details
Main Authors: Egeland,Alv, Larsen,Trygve Roed
Other Authors: NORWEGIAN INST OF COSMIC PHYSICS UNIV OF OSLO
Format: Text
Language:English
Published: 1966
Subjects:
Atmospheric Physics
Radiofrequency Wave Propagation
*RADIO WAVES
GEOPHYSICS
ELECTROMAGNETISM
ATMOSPHERICS
RESONANT FREQUENCY
NORWAY
Isfjord
Lavangsdalen
Norway
Northern Norway
Spitzbergen
Online Access:http://www.dtic.mil/docs/citations/AD0632299
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0632299
Description
Summary:The earth-ionospheric cavity resonance frequencies were measured by two methods somewhat different from that employed hitherto by other workers. The instruments used were all battery-operated. The recordings have been carried out close to Isfjord Radio, Spitzbergen (geographic latitude 78 deg 03.9 min N) and close to Lavangsdalen, Northern - Norway (geographic latitude 69 deg 15.5 min N) during 1965. It has been possible to record detailed power spectra of these cavity resonances by integration over only a few seconds of data. Between DC and 45 c/s average peak frequencies at (7.78 plus or minus 0.08), (14.05 plus or minus 0.15), (20.3 plus or minus 0.2), (32.1 plus or minus 0.2), 32.1 plus or minus 0.3), 37.1 plus or minus 0.3) and 42.9 plus or minus 0.4) c/s have been observed. Also at frequencies above 45 c/s there seems to be strong indications of higher resonance modes. (Author)

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