RESEARCH ON VLF PROPAGATION IN ARCTIC REGIONS. GEOPHYSICAL EFFECTS

Atmospheric noise data collected in the Arctic were used to determine certain geophysical effects on VLF propagation between 3 and 30 kc in arctic regions. The effect of sudden ionospheric disturbances in the form of a sudden enhancement of atmospherics is defined in the 3 to 30 kc frequency band. V...

Full description

Bibliographic Details
Main Author: WHITSON,ARTHUR L.
Other Authors: STANFORD RESEARCH INST MENLO PARK CALIF
Format: Text
Language:English
Published: 1961
Subjects:
*PROPAGATION
*RADIO WAVES
ATMOSPHERICS
EXTRATERRESTRIAL RADIO WAVES
EXTREMELY LOW FREQUENCY
GEOPHYSICS
IONOSPHERIC DISTURBANCES
IONOSPHERIC PROPAGATION
MEASUREMENT
NOISE ANALYZERS
POLAR REGIONS
SOLAR DISTURBANCES
SOLAR FLARES
VERY LOW FREQUENCY
Arctic
Fairbanks
Online Access:http://www.dtic.mil/docs/citations/AD0256062
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0256062
Description
Summary:Atmospheric noise data collected in the Arctic were used to determine certain geophysical effects on VLF propagation between 3 and 30 kc in arctic regions. The effect of sudden ionospheric disturbances in the form of a sudden enhancement of atmospherics is defined in the 3 to 30 kc frequency band. Very-low-frequency propagation along the Fairbanks-Thule great-circle path,AS MEASURED BY Fourier analysis of atmospherics, is non-reciprocal but disagrees with non-reciprocal measurements at mid-latitudes. The influence of a polar-cap-absorption event on atmospheric noise is shown, along with variations in atmospheric noise spectrum that are related to some unexplained VLF propagation phenomena. (Author)

Similar Items