Improved indirect phase reflection height measurements at Panská ves - first results     

Vladimír Fišer  Jan Laštovička 《Studia Geophysica et Geodaetica》1992,36(4):358-369

Summary Indirect phase reflection height measurements have been performed at the Panská Ves Observatory, Czechoslovakia, on two frequencies of 162 (earlier 164) and 153 kHz (earlier 155) for 30 years. However, they were used only for solar flare effect (SFA) monitoring. After introducing new measuring equipment in 1985, the quality of the 162 kHz records became sufficient to apply the indirect phase height analysis (IPHA) method in full. The method itself, the measuring equipment, and the method of evaluation are described in [1]. The purpose of this paper is to describe the first results and to verify the reliability of the 162 kHz IPHA data. The IPHA method as applied to the 162 kHz measurements made at Panská Ves, allows ionospheric and neutral atmospheric parameters to be studied simultaneously and appears to provide reliable and good quality data. The expected seasonal variation and response to sudden stratospheric warmings are observed. The use of the 162 kHz IPHA data in the international MAC/SINE and DYANA campaigns and for monitoring pressure variability at 80 km are briefly described.  相似文献   

The stability of isothermal and natural remanent magnetic polarization under elastic deformation of rocks     

A. Kapička 《Studia Geophysica et Geodaetica》1992,36(2):168-176

Summary With the decreasing magnitude of the initial remanent condition of rocks, their pressure demagnetization gradually changes to pressure remanent magnetic polarization under elastic deformation. In both cases the physical cause of these changes are the irreversible changes of the domain structure of ferrimagnetic minerals. Under directional pressure the natural remanent magnetic polarization is affected namely by the generation of a relatively little stable pressure remanent magnetic polarization. With regard to paleomagnetic research, the essential thing is that secondary magnetization combined with possible elastic deformations of rocks in the Earth's crust can be eliminated relatively easily by magnetic cleaning.  相似文献   

Statistical processing of anisotropy of magnetic susceptibility measured on groups of specimens   总被引：21，自引：0，他引：21  

Vít Jelínek  Reviewer V. Kropáček 《Studia Geophysica et Geodaetica》1978,22(1):50-62

Summary The theory of multivariate statistical processing of the anisotropy of magnetic susceptibility, measured on a group of specimens, originating from a single geological body (outcrop, locality, etc.), is described. The result of the processing is an estimate of the mean normalized tensor and the estimates of the principal susceptibilities, derived from it, together with the respective intervals of confidence, and the estimates of the principal directions with the respective regions of confidence. An anisotropy test for a group of specimens is proposed. The function of the ANS21 computer program employed is briefly described and an example of its output plot is presented.Dedicated to RNDr. Jan Pícha, CSc., on his 60th Birthday  相似文献   

Filtration and prediction of inhomogeneous anomalous geophysical potential fields     

Lubomír Kubáček  Ludmila Kubáčková  Reviewer M. Burda 《Studia Geophysica et Geodaetica》1978,22(4):330-335

Summary A mathematical model for optimum prediction, filtration and simultaneous prediction and filtration of the fields considered has been constructed using Hilbert spaces with a reproduction kernel, formed by the covariance function of the observed anomalous geophysical potential field under the assumption that the field is an inhomogeneous random function.  相似文献   

Sequential connecting of networks     

Lubomír Kubáček  Reviewer F. Charamza 《Studia Geophysica et Geodaetica》1978,22(3):224-230

Summary It is possible to establish a continuous geodetic network on a larger part of the Earth's surface, among other ways, also by sequential connecting of local networks. A method is studied, which is based on the principle of maximum likelihood and which enables the statistical properties of the local networks to be respected in connecting them into a single whole.  相似文献   

Search for orthorhombic or higher symmetry in rocks     

Karel Klíma  Zdeněk Pros  Reviewer K. Pěč 《Studia Geophysica et Geodaetica》1981,25(3):245-261

Summary The properties of quadrics of stress and strain, which were derived from the eigenvectors of the matrix of elastic constants, are analysed for a medium with orthorhombic or higher symmetry. It was found that the orientation of the axes of the quadrics can be employed to determine the crystallographic axes of the medium. This formalism derived for minerals is used for finding the axes of the internal symmetry of a rock for which we assume a distribution close to that of the orthorhombic system with a view to the spatial distribution of P-wave velocities.  相似文献   

General models of circum-global and quasi-global radiation on Hills of simple geometrical shapes     

Prof. Dr. A. Hočevar  J. Rakovec 《Theoretical and Applied Climatology》1977,25(2):151-164

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Transmitted waves in the vicinity of the interface beyond the critical point     

Lothar Dresen  Stefan Freystätter  Jan Kozák  Ivan Pšenčík  Reviewer V. Červený 《Studia Geophysica et Geodaetica》1977,21(2):137-142

Summary The space (time) delay of transmitted waves in the vicinity of the interface beyond the critical point is investigated on two-dimensional seismic models of a low velocity channel; results of laboratory experiments are compared with the conclusions of the theory. The effect of the time delay in field measurements is demonstrated by means of two typical geological formations.  相似文献   

Macroseismic effects of the north-Italian earthquake of May 6th, 1976, on the territory of Czechoslovakia     

Dana Procházková  Libuše Ruprechtová  Zdeňka Schenková  Arnošt Dudek  Reviewer J. Janský 《Studia Geophysica et Geodaetica》1977,21(3-4):293-295

Summary The method of treatment of the macroseismic data obtained on the territory of the CSSR after the main 1976 Friuli earthquake is described and the preliminary results are confronted with the geologic structure.  相似文献   

Heat production data from airborne and laboratory measurements of gamma-ray activity of rocks     

Vladimír Čermák  Věra Vaňková  Milan Matolín  Jiří Bartošek  Reviewer A. Janáčková 《Studia Geophysica et Geodaetica》1977,21(1):70-80

Summary The paper discusses the obvious experimental relation between the laboratory determinations of total gamma-ray activity, expressed in equilibrium uranium concentration, and heat production due to radioactive decay. The heat production data were calculated by means of the concentrations of uranium, thorium and potassium determined spectrometrically, together with the conversion factors into the rate of heat generation. The obtained relation may help define the typical heat production for characteristic surface rocks and estimate their contribution in heat flow study. Between the gamma-ray activity recorded during aeroradiometric mapping and the laboratory radiometric measurements of surface rock samples, there is also an experimental relation, which can be used further in estimating the value of surface heat production at a chosen locality.  相似文献