Computer Science – Sound
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.1261h&link_type=abstract
Journal of Geophysical Research, vol. 84, Apr. 1, 1979, p. 1261-1268.
Computer Science
Sound
9
Gravity Waves, Ionospheric Propagation, Radio Reception, Storms (Meteorology), Tornadoes, Troposphere, Doppler Effect, High Frequencies, Radio Receivers, Radio Transmitters, Signal Transmission
Scientific paper
The paper examines the coupling between the ionosphere and the troposphere during time periods with isolated tornadoes on the stormy day of November 20, 1973. Observations are made with a high-frequency CW Doppler array system, in which radio receivers located at a central site monitored signals transmitted from three independent remote sites on three sets of frequencies (4.0125, 4.759, 5.734 MHz) and reflected off the ionosphere approximately halfway between the transmitter and receiver sites. It is shown that the sources of the gravity waves associated with tornadoes are always on the squall lines and near the tornado touchdown locations, and that analyses of ionospheric Doppler sounder observations of medium-scale gravity waves can contribute to the understanding of the coupling between the ionosphere and the troposphere during periods of severe storm activity.
Hung R. J.
Phan Tuoc
Smith Robert E.
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