The first satellite laser ranging at ondřejov observatory     

Petr Lála  Miroslav Prokeš  Reviewer M. Burša 《Studia Geophysica et Geodaetica》1976,20(4):391-395

Summary The first laser ranging of the satellites Geos A and B performed at Station 1148 Ondejov in 1972–1975 are evaluated. The least-squares method was used to estimate their internal accuracy. Polynomials of the 6th to 8th degree were found to be necessary for the best fit of a typical satellite pass. The root mean square error is always smaller than 20 ns (3 m), which is consistent with the expected accuracy of the laser ranging system.Dedicated to Prof. RNDr. Emil Buchar, DrSc., Corresponding Member of the Czechoslovak Academy of Sciences, on the Occasion of His 75^th Birthday  相似文献   

A hypothetical estimated mass of the muon neutrino and the mass of the tau neutrino     

Vladimír Skalský  Miroslav Súkeník 《Astrophysics and Space Science》1993,204(1):161-162

Using the see-saw mechanism and estimation of the hypothetical mass of the electron neutrinom _e we find the hypothetical mass of muon neutrinom _µ and hypothetical mass of the tau neutrinom .  相似文献   

The Effect of Humic Acids on Zymogenous Microbial Consortia Growth          下载免费PDF全文

Srdjan B. Miletić  Snežana D. Spasić  Jelena Avdalović  Vladimir Beškoski  Mila Ilić  Gordana Gojgić‐Cvijović  Miroslav M. Vrvić 《洁净——土壤、空气、水》2014,42(9):1280-1283

  相似文献   

On the uncertainty of the transmission function of the optically thick AGB dust shells     

Miroslav Kocifaj  Jozef Klačka  Thomas Posch 《Astrophysics and Space Science》2008,317(1-2):31-38

The uncertainty of the spectral transmission function due to the nonsphericity of cosmic dust particles is analysed for optically thick C-rich and O-rich dust shells. The transmission function directly prescribes the intensity of radiation that passes through a dust shell. It is shown that nonspherical particles affect the stellar spectra in a different way than a system of equally sized spherical particles. Discrepancies in the stellar spectra for both morphological models (spheres and irregular targets) grow with optical thickness of the dust shell and the spectral behaviour of the optical thickness depends on the particle size distribution function. In particular, two most frequently used distrubutions, a power law and Dirac’s delta function, are considered in the presented numerical runs. Light transmission through C-rich dust shells is strongly influenced by absorption which dominates in case of carbonaceous particles. Irregularly shaped carbonaceous particles reduce the intensity of stellar spectra more efficiently than spherical particles of the same composition (the difference is about 10–30%). MgO particles which may be present in O-rich dust shells are almost pure scatterers, thus the ratio of transmission functions for irregularly shaped particles and spherical ones show specific resonant features (especially at wavelengths below 0.4 μm).  相似文献   

Outburst flood hazard: Case studies from the Tien-Shan Mountains, Kyrgyzstan   总被引：3，自引：0，他引：3  

Bohumír Janský  Miroslav Šobr  Zbyněk Engel 《Limnologica》2010,40(4):358-364

More than 2000 of mountain lakes covering more than 0.1 ha exist in a territory of Kyrgyzstan. Nearly 20% of them are dangerous because of instability of lake dams, frequent overflows and melting of buried ice inside the moraine dams. According to the Kyrgyz lake inventory, 328 lakes are at risk of outburst and 12 lakes are considered as actually dangerous. Since 1952 more than 70 disastrous cases of lake outbursts have occurred. The majority of the endangered lakes belong to one of the three genetic types: morainic-glacier, supraglacial and lake dammed by landslides and debris flows. Petrov, Adygine and Koltor lakes were selected and studied in the Tien-Shan Mountains as case studies of the most frequent genetic types of hazardous lakes. Observations were focused on the morphology of the lake basin and the surrounding relief, outflow pattern and processes controlling the development of lake. For the hazard assessment, evolution of glaciers and lakes was reconstructed using historical reports, aerial photographs and satellite images.  相似文献   

Graphical forecasting of absolute topography 50 cb by means of Sawyer-Bushby baroclinic model     

Miroslav Škoda 《Studia Geophysica et Geodaetica》1958,2(3):280-290

  相似文献   

Diffusion of radiation in planetary atmospheres     

Miroslav Kocifaj 《Earth, Moon, and Planets》1994,65(1):21-29

The problem of interaction of the solar radiation with the turbid Earth atmosphere, containing complicated polydispersive aerosol systems, is discussed in this paper. Equations for computing the angular functions ofn-th order scattering are derived. On the basis of these functions the spectral radiance, radiation flows and radiation balance of the atmosphere in the short-wave spectral range are calculated. The relations obtained can be used to calculate the complex index of refraction, distribution function and other characteristics of the submicron aerosol fraction, by solving the inverse problems.  相似文献   

A hypothetical end of the expansive-creative evolution phase of the ultrastable expansive nondecelerative universe (II)     

Vladimír Skalský  Miroslav Súkeník 《Astrophysics and Space Science》1993,209(1):123-130

The maximal entropy and the final parameters of the expansive-creative evolution phase of the ultrastable Universe can be determined from model properties of the expansive nondecelerative Universe.The possibility of existence of primordial black holes with temperature of the Universe follows from the initial entropy of the Universe. This fact throws new light on the problem of dark matter.  相似文献   

Characteristic frequencies of seismic attenuation due to wave-induced fluid flow in fractured porous media   总被引：2，自引：0，他引：2  

Miroslav Brajanovski  Tobias M. Müller  Boris Gurevich 《Geophysical Journal International》2006,166(2):574-578

  相似文献   

Two-stream approximation for rapid modeling the light pollution levels in local atmosphere     

Miroslav Kocifaj 《Astrophysics and Space Science》2012,338(2):301-307

  相似文献