Accession Number : AD0679446

Title :   THE DEPENDENCE OF IONOSPHERIC ABSORPTION OF MF RADIO WAVES AT MID-LATITUDES ON PLANETARY MAGNETIC ACTIVITY,

Corporate Author : DEFENCE RESEARCH TELECOMMUNICATIONS ESTABLISHMENT OTTAWA (ONTARIO) RADIO PHYSICS LAB

Personal Author(s) : Bourne,I. A. ; Hewitt,L. W.

Report Date : 22 NOV 1967

Pagination or Media Count : 15

Abstract : A statistical analysis of MF radiowave absorption data at middle European latitudes shows that there is a positive short-term correlation (i.e. for periods of up to 30 days) with solar activity and planetary magnetic activity. The maxima and minima in mid-latitude absorption, however, occur several days after the corresponding K sub p variations. Since the effects are more pronounced in autumn and winter than in spring and summer, this may explain some of the published reports of anomalous winter absorption in Europe. (Author)

Descriptors :   (*IONOSPHERE, RADIO WAVES), (*RADIO WAVES, ABSORPTION), GEOMAGNETISM, MEDIUM FREQUENCY, EXTRATERRESTRIAL RADIO WAVES, SOLAR RADIATION, STRATOSPHERE, MESOSPHERE, STATISTICAL ANALYSIS, MAGNETIC STORMS, CANADA, EUROPE

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE