DocumentCode :
1045261
Title :
A new sporadic layer providing VLF propagation
Author :
Ortner, J. ; Egeland, A. ; Hultqvist, B.
Author_Institution :
Kiruna Geophys. Observatory of the Royal Swedish Academy of Science, Kiruna, Sweden
Volume :
8
Issue :
6
fYear :
1960
fDate :
11/1/1960 12:00:00 AM
Firstpage :
621
Lastpage :
628
Abstract :
During two periods in May and July, I959, following strong solar flares, the signal strength of receptions at Kiruna of VLF transmissions from Rugby (16 kc) showed no or only slight diurnal variation. It is proposed that the change of the diurnal variation is due to the production by solar protons of an ionized layer very deep in the atmosphere, the electron density of which is sufficient for reflection of very long waves but too low to cause measurable nondeviative absorption in the HF band at geomagnetic latitudes lower than approximately 
.
.Keywords :
Earth-ionosphere waveguide; Ionospheric propagation; Plasma generation; Solar radiation; VLF radio propagation; Absorption; Atmosphere; Atmospheric measurements; Density measurement; Electrons; Geomagnetism; Hafnium; Production; Protons; Reflection;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IRE Transactions on
Publisher :
ieee
ISSN :
0096-1973
Type :
jour
DOI :
10.1109/TAP.1960.1144904
Filename :
1144904
Link To Document :
