caa a22 4500 46910466X CHVBK 20180323133053.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF01634789 doi (NATIONALLICENCE)springer-10.1007/BF01634789 Application of the method of numerical simulation of ionospheric filtration of Pc1 signals to solving the inverse problem of ionospheric modelling [Elektronische Daten] [Karel Prikner, Dora Fligel] Summary: The numerical method of simulating ionospheric filtration of ULF signals in the range of Pc1 frequencies has been applied to French geomagnetically conjugate observations of ULF signals made by the GEOS-1 satellite and at the observatory of Husafell (Iceland) [2]. The experimentally obtained variable values of the transmissivity of the Pc1 signal through the ionosphere [5] in the course of the micropulsation distrubance of 13.7. 1977 have been compared with the results of the numerical simulation taking into consideration the fundamental physical parameters of the high-latitude external ionosphere. This approximate form of solving the inverse problem of ionospheric modelling yielded quantitative estimates of the rapid variations of the concentration of charged particles in connection with the expected changes of their temperature. It is assumed that nonstationary states of the ionospheric plasma are caused by the very ion-cyclotron waves penetrating the ionosphere at high latitudes (Φ ∼ 70°) along the plasmapause. Academia, Publishing House of the Czechoslovak Academy of Sciences, 1992 Prikner Karel Geophysical Institute, Czechosl. Acad. Sci., Prague aut Fligel Dora Institute of the Physics of the Earth and Radio Wave Propagation, Moscow aut Studia Geophysica et Geodaetica Kluwer Academic Publishers 36/3(1992-09-01), 240-256 0039-3169 36:3<240 1992 36 11200 https://doi.org/10.1007/BF01634789 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01634789 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prikner Karel Geophysical Institute, Czechosl. Acad. Sci., Prague aut NATIONALLICENCE 700 1- Fligel Dora Institute of the Physics of the Earth and Radio Wave Propagation, Moscow aut NATIONALLICENCE 773 0- Studia Geophysica et Geodaetica Kluwer Academic Publishers 36/3(1992-09-01), 240-256 0039-3169 36:3<240 1992 36 11200 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer