Some Phenomena concerning Lower Reflecting Regions experienced in making the Meteorological Observations by Radiometeorographs

Abstract

In observing the temperature in the upper atmosphere using radiometeorographs emitting waves of frequency varying from 14000 kc/s to 16000 kc/s, we experienced comparatively lower and limited regions in which the signals fluctuated suddenly or entirely disappeared. When the barometer becomes to rise, such regions seem gradually to fall in lower heights. Such lower regions seem to coincide with the c₁ layer which was proposed by A. W. Friend in the Proceeding of the Institute of Radio Engineers, Vol. 25, No.12, 1937.