HIGH-FREQUENCY RADIO-WAVE BLACK-OUTS AT MEDIUM AND HIGH LATITUDES DURING A SOLAR CYCLE

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Authors
  1. Collins, C.
  2. Jelly, D.H.
  3. Matthews, A.G.
Corporate Authors
Defence Research Telecommunications Establishment, Ottawa ONT (CAN)
Abstract
Recent studies at DRTE, comparing v.h.f. riometer and h.f. ionosonde data for the IGY, have shown that the two types of absorption events, 'polar cap' and 'auroral', can be identified in the occurrence patterns of ionosonde black-outs. A study based on this comparison has been made of all black-outs observed at a number of medium-and high-latitude ionosonde stations during the period 1949 to 1959. It has been found that the two kinds of absorption events show markedly different variations during the 11 years.
Keywords
Ionospheric waves;Absorption;Polar blackouts;Solar activity;Aurora
Date of publication
15 Aug 1960
Number of Pages
22
DSTKIM No
61-03086
CANDIS No
140043
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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