Wave diagnostics of the outer high-latitude ionosphere under application of numerical simulation of ionospheric filtration to simultaneous,conjugate, ground-based and satellite measurements of Pc1 signals     

Karel Prikner  Dora S. Fligel 《Studia Geophysica et Geodaetica》1994,38(2):187-205

Summary Based on the French conjugate experiment of satellite and ground-based measurements of ULF signals on GEOS-1 and at Husafell, changes of the ionospheric filter in the course of a series of measurements of intensive Pc1 micropulsations (ICW) on 1. 8. 1977 were wave diagnosticated. Changes of the vertical profile of electron concentration in the outer high-latitude ionosphere were simulated numerically by solving approximately the inverse problem using the matrix method of numerical modelling of ionospheric filtration in Pc1 frequencies. It was found that the intensive ICW packets could have propagated through the corridor of the high-latitude ionospheric plasma through. Quantitative estimates of ionospheric changes, however, are usually upset by the effects of other factors in the course of the wave's propagation through the outer magnetosphere.  相似文献   

Professor Berřich Šalamon     

Karel Ku chař 《Studia Geophysica et Geodaetica》1960,4(3):310-311

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Rapid changes in the fourier spectra ofPi1 Pulsations during magnetically disturbed periods     

Karel Prikner 《Studia Geophysica et Geodaetica》1969,13(4):444-456

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A comparison of measured and calculated elastic anisotropies of marble     

Karel Klíma  Vladislav Babuška 《Studia Geophysica et Geodaetica》1968,12(4):377-384

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Dispersion and amplitudes of love waves for some models of the earth's crust and mantle     

Karel Pěč  Oldřich Novotný  Reviewer J. Vaněk 《Studia Geophysica et Geodaetica》1976,20(1):10-38

Summary The properties of the partial derivatives of dispersion curves, amplitudes and theoretical seismograms, in particular the occurrence of short-period phases, are studied on four crustmantle models. The individual models differ in the number of low-velocity channels. The fundamental and first higher mode of Love waves are studied in detail.  相似文献   

Long period variations of the geomagnetic field and their spatial distribution in Europe     

Jana Pěčová  Oldřich Praus  Karel Pěč  Reviewer A Janáčková 《Studia Geophysica et Geodaetica》1977,21(2):148-158

a 27 nu amu ama m¶rt;au nma aaua ¶rt; nu nma anum¶rt; 27-¶rt; auauu u ÿeau nu¶rt;au 13–14 u 9 ¶rt;. mam an¶rt;u nma anum¶rt; Z u H mau a n nuuuu auauuu uuP ₁ (cos ) u P ₁ /, mmm. mau mau a um auumu mau auau ¶rt; mmu mu Z/H ¶rt; a¶rt; amuu. au ¶rt; mmuuu u umu a¶rt;au muu ¶rt; ¶rt;am uau mu ¶rt;¶rt;mmu mu u. a aaua au mu Z/H ¶rt;m u uam n u m aa amu.  相似文献   

Anomalous induction in the Carpathians     

Jerzy Jankowski  Antoni Szymański  Karel Pěč  Václav Červ  Václav Petr  Jana Pěčová  Oldřich Praus  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1977,21(1):35-57

nuam mam uu auauaum n aumua ¶rt; a 9 n mau ¶rt; nu No V, na anam. ma uam a aa u¶rt;uu aau ¶rt; uu u mau anamau. m m u¶rt;uu u aauuaa amma aamumua aa ma. ¶rt;a a m¶rt; mau ¶rt; aumua u mm a¶rt;u n a m u mau. uamua aau ¶rt;m u mu ma, m m ¶rt;u u umu m n. maum aamumuu n nma mmuuu aauu aumau ¶rt; m ¶rt;- ¶rt;¶rt;muu mm ¶rt; nu u m¶rt; am.

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A substantial part of this paper was presented at the IAGA symposium Relations between External and Internal Magnetic Variations, XVI. IUGG General Assembly, August–September 1975, Grenoble.  相似文献   

Seismic refraction problem in anisotropic media of the cretaceous plateau in czechoslovakia     

Karel Cidlinský  Reviewer I. Pšenčík 《Studia Geophysica et Geodaetica》1980,24(1):98-101

Summary Media with a distinct anisotropy make application of the refraction method for seismic exploration rather complicated. Velocity data obtained by seismic shooting, sonic log and laboratory measurements of borehole cores have been studied in the region of the Bohemian Cretaceous and interpretation problems of refraction have been analysed. Experience has shown that in such complicated anisotropic media the reflection method in the CDP modification has proved to be much more suitable.Paper was presented at the workshop meeting Seismic Waves in Laterally Inhomogeneous Media, Liblice 1978.  相似文献   

Ulf-wave diagnostics of a mid geomagnetic latitude model of the ionosphere     

Karel Prikner  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1980,24(2):173-190

Summary Wave diagnostics of several alternatives of a constructed model of the daytime and night ionosphere of the mid geomagnetic latitudes were carried out in the ULF range of electromagnetic waves. The altitude profiles of local wave parameters of the ionosphere, the wavelengths and wave attenuation, were analysed at a fixed frequency. The frequency dependence of the amplitude and polarization characteristics of the total wave at the Earth's surface were also analysed in dependence on the frequency-amplitude spectrum of geomagnetic pulsations. The effect of the low regions of the ionosphere (h<100 km) was tested on the damping of the propagating wave and on the frequency-amplitude and polarization characteristics of the wave at the Earth's surface.  相似文献   

Frequency band of mirroring and bands of increased transmissivity of ULF waves through the ionosphere     

Karel Prikner  Reviewer M. Hvoždara 《Studia Geophysica et Geodaetica》1982,26(1):96-101

Summary Using methods of numerical modelling of the propagation of ULF waves through the ionosphere, the characteristics of the vertical flux of electromagnetic energy are analysed in the ULF range — at the outer boundary of the modelled ionosphere (altitude 1000 km) the reflexibility and penetrability of the energy, at the Earth's surface the transmissivity of the energy. The existence of two frequency bands is proved within the ULF range with different forms of ionospheric wave filtration: a) The band of extremely low frequencies, f<0.1–0.2 Hz (pc3–5 and Pc2 pulsation ranges) with a mirroring effect of the ionosphere-Earth system, but with small absorption; b) the band f>0.2 Hz (the Pc1 range) with increased absorption, but with resonance windows and wave emissions with a very well defined frequency structure.  相似文献