Referenced Items are not available for this document.
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
Published in:
Antennas and Propagation, IRE Transactions on
(Volume:8
,
Issue:
6
)
Date of Publication: November 1960
- Page(s):
- 621 - 628
- ISSN :
- 0096-1973
- Digital Object Identifier :
- 10.1109/TAP.1960.1144904
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 January 2003
- Issue Date :
- November 1960
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