In this paper the interrelation between geomagnetic pulsations and variations
in frequency Doppler shift (Fd) of the ionosphere-reflected radio signal is
under investigation. The experiment on simultaneous recording of Fd variations
and geomagnetic pulsations was organised at high latitude station in Norilsk
(geomagnetic latitude and longitude 64.2 N, 160.4 E, L=5.3) during
Febrary-April of 1995-98. Thirty cases of simultaneous recording of duration
from 10 min to two hour were analysed: 6 cases of simultaneous recording of
variations Fd and regular geomagnetic pulsations Pc5; and 25 cases of recording
of Fd variations and irregular pulsations Pi2.
On the basis of experimental results, the following conclusions have been
drawn: a) Hydromagnetic waves in the range of regular Pc5 pulsations, when
interacting with the ionospheric F2 layer, make the main contribution to
short-period Fd variations. The possible mechanism of Fd variations are
oscillations of electron density, associated with distribution of a
hydromagnetic wave in an ionosphere. b) There exists an unquestionable
interrelation between Fd variations of the sporadic E layer-reflected radio
signal and irregular Pi2 pulsations, but for some reasons it is traced poorly.Comment: EmTeX-386, 8 pages, 4 figures, article: P-gpion.tex,
figures:F1-gpion.PS.Z; F2-gpion.PS.Z; F3-gpion.PS.Z; F4-gpion.PS.
observations of the inhomogeneous structure of the highlatitude ionosphere were carried out at Norilsk (geomagnetic latitude and longitude are 64.2 • N and 160.4 • E, and L = 5.2). Small-scale irregularities (with the lifetime of several seconds,and the spatial scale less than 5-7 km), and medium-size wave irregularities(with the period of 10-50 min, and the horizontal size of tens and hundreds of kilometres) of the ionospheric F layer were investigated under different geophysical conditions. A total of 300 hours of observations was recorded, including 250 reflections from the F2 layer, and the other reflections from the sporadic E layer.The diurnal variations of inhomogeneous structure parameters in March and April is obtained. Dependence of some ionospheric irregularity parameters on geomagnetic activity is presented.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.