Title :
Characteristics of the Ionosphere at Washington, D.C., February, 1940, with Predictions for May, 1940
Author :
Gilliland, T.R. ; Kirby, S.S. ; Smith, N.
Author_Institution :
National Bureau of Standards, Washington, D.C.
fDate :
4/1/1940 12:00:00 AM
Abstract :
Data on the ordinary-wave critical frequencies and virtual heights of the ionospheric layers are presented for the period indicated in the title. The monthly average values of the maximum usable frequencies for undisturbed days, for radio transmission by way of the regular layers is also provided.
Keywords :
Design engineering; Electrons; Ionosphere; NIST; Predictive models; Resonant frequency; Shape; Size measurement; Storms; Transmission lines;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1940.228084
