Temporal characteristics of F region wave-type irregularities from Doppler measurements at Moscow station

V. Kh. Depuev

Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences

Abstract

On the basis of Doppler measurements of vertical ionospheric sounding, temporal characteristics of wave-type irregularities of the midlatitude F region and their seasonal signatures are studied. The periods of the daytime quasi-periodic fluctuations N_e are found to range from 2.3 to 120 min, their intensities increasing from summer to winter. Irregularities with periods of 20.0, 7.5, and 3.5 min are most frequently observed in winter months; those with periods of 7.5 and 3.0 min occur most often during the equinox; and irregularities with periods of 60.0, 4.0, and 2.5 min predominate in summer.

Figures 2, Tables 0, References 9, Pages 418-420
Received July 26, 1994

© Copyright 1996 by the American Geophysical Union.
CCC code: 0016-7932/96/3503-0020$18.00/1

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