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Some experimental results obtained by ionospheric investigations in Sweden during the total solar eclipse of July 9, 1945

1947; Volume: 52; Issue: 4 Linguagem: Inglês

10.1029/te052i004p00479

2379-5697

Sven Gejer, Per Åkerlind,

Earthquake Detection and Analysis

Summary —Determinations of critical frequencies and virtual height made by the Swedish Board of Telegraphs are described and also other measurements made in Sweden during the eclipse. Definite effects on the critical frequencies for the different layers were established by means of multifrequency recordings made at Östersund and Enköping. Thus the decrease in E ‐layer electronic density from the assumed undisturbed value was about 57 per cent. For the F 1‐layer the corresponding decrease was 63 per cent and for the F 2‐layer approximately 33 per cent.