On the relation between long-wave reception and certain terrestrial and solar phenomena

Sreenivasan, K. (1929) On the relation between long-wave reception and certain terrestrial and solar phenomena Proceedings of the Institute of Radio Engineers, 17 (10). pp. 1793-1814. ISSN 0731-5996

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Related URL: http://dx.doi.org/10.1109/JRPROC.1929.221589


It is shown in the paper that there appears to be an inverse relation between long-wave reception on 75 kc per sec. and the temperatures at the transmitting and receiving stations, when the distance between them is not great. The explanation is offered that the variations i the temperatures and in the signal strength are due to a common source, the changes in the medium between the two places. If at all, only a direct relationship has been noticed between field intensity and the barometer reading at the receiving station. There is found to be good correlation between atmospheric ozone in northwestern Europe and Bangalore reception, and between the two and sunspots. Little correlation is found between these and terrestrial magnetism as represented by the international magnetic character of day numbers. Analysis of the data on the basis of the 27-day period has yielded very satisfactory agreement between reception and sunspots, with a six-day period in reception for which no explanation is found. The lag of one to two days between reception and sunspots occasionally occurring has been explained on the basis of the emission of high speed corpuscles from the sun. Regarding some of the differences between long-and short-wave transmission, the transmission of short waves is attributed to electron movement in the higher regions of the upper atmosphere and that of long waves to less mobile ions below. It is on this basis that the correlation between reception and ozone may be explained.

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