Physics
Scientific paper
Apr 1947
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1947natur.159..572k&link_type=abstract
Nature, Volume 159, Issue 4043, pp. 572-573 (1947).
Physics
Scientific paper
IT has been known for many years1 that there are anomalies in the number and strength of the distant atmospherics observed during the sunrise and the sunset periods. Investigations2 in this laboratory on distant atmospherics on high and medium radio frequencies showed unmistakable maxima during sunrise and sunset. Previously, Potter3 had observed similar effects. The effect of sunset on atmospherics was also reported by Subba Rao4. Besides Potter and Namba5, Khastgir6 recently offered an explanation of the sunrise and sunset effects observed. The object of the present communication is to show that on this theory a simple method can be devised for the location of a thunderstorm centre which gives rise to atmospherics by observing the time of occurrence of the maximum in the strength of the atmospherics, when the distant thunderstorm prevails over a period of time covering sunrise or sunset. The results of some directional observations of atmospherics at about sunset are also given in this connexion.
Das Gupta M. K.
Ganguli D. K.
Khastgir S. R.
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