Round-the-clock measurements of absorption and motions in the lower atmosphere for diversity reception of signals from LF broadcasting stations

The computer Doppler filtering of a ground wave is proposed for diversity reception of signals from LF broadcasting stations with a high-stability master oscillator. This method can be employed in round-the-clock measurements of the motion characteristics, absorption, and angles of arrival of radio waves. The method was implemented in a LF receiving complex. First results on the dynamics of ionospheric irregularities and radio wave absorption at ionospheric D-layer heights are presented. Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Iskutsk, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 40, No. 7, pp. 836–844, July, 1997.