On the systematic errors of the determinations of the absolute orientation of the meridian marks     

G. M. Petrov 《Astrophysics and Space Science》1991,177(1-2):269-270

The classical method of determination of the absolute azimuth (or Bessel's parameter n) can secure sufficiently precision for RA from observations of stars at high geographical latitudes during polar night only.  相似文献   

Development of a real-time algorithm for detection of solar wind discontinuities     

D. Vandev  K. Danov  P. Mateev  P. Petrov  M. Kartalev  N. Trendafilov  Z. K. Smith  M. Dryer 《Astrophysics and Space Science》1986,120(2):211-221

A study is presented of an algorithm, based on the statistical analysis of interplanetary magnetic field data, for the real-time detection of discontinuities in the solar wind. The analysis is based on the application of a sliding or searching algorithm together with a minimum variance treatment. A demonstration is given for a Pioneer data set from 29 August, 1966. This particular data set was chosen because it has been extensively studied (in terms of the fast forward MHD shock wave) by previous groups who utilized the three-dimensional Rankine-Hugoniot shock equations after identifying the shock on a subjective basis. Our procedure differs in that it is perfectly objective because of its searching technique. For this particular data set we identify the original shock with excellent agreement with the earlier studies of its normal vector, as well as an additional shock and tangential discontinuity, neither of which had been identified previously.  相似文献   

Isotopic parameters of meteoric waters in fractured porous rocks of the Tulukuev ore deposit     

E. O. Dubinina  V. A. Petrov  V. N. Golubev 《Doklady Earth Sciences》2008,421(2):914-918

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Timing of the onset of collision in the Central and Northern Urals     

G. A. Petrov  Yu. L. Ronkin  A. V. Maslov  I. A. Svyazhina  A. V. Rybalka  O. P. Lepikhina 《Doklady Earth Sciences》2008,422(1):1050-1055

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New Paleomagnetic and isotopic data on the Mesoproterozoic igneous complex on the northern slope of the Anabar uplift     

R. V. Veselovskiy  P. Yu. Petrov  S. F. Karpenko  Yu. A. Kostitsyn  V. E. Pavlov 《Doklady Earth Sciences》2006,411(1):1190-1194

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New forms of platinum group minerals in ferruginous quartzites of the Lebedyan deposit, Kursk Magnetic Anomaly (Central Russia)     

N. M. Chernyshov  S. V. Petrov 《Doklady Earth Sciences》2006,408(1):586-589

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Molar tooth structures and origin of peloids in proterozoic carbonate platforms (Middle Riphean of the Turukhansk Uplift,Siberia)     

P. Yu. Petrov 《Lithology and Mineral Resources》2016,51(4):290-309

Structures and textures of the peloidal wackestones, as well as size, shape, and composition of peloidal grains, from the Mesoproterozoic (Middle Riphean) Sukhaya Tunguska carbonate platform in the Turukhansk Uplift (Siberia) are considered. It is shown that these grains formed in the course of diagenesis were closely associated with the microsparitic replacement and the formation of molar tooth (MT) structures. Diagenetic transformations of rocks were related to the activity of anaerobic microbial communities inside the buried carbonate silt layers. The microbial activity during diagenesis was governed by the carbonate sediment composition and conservation mechanism of the high-molecular organic matter of primary producers therein, since this organic matter was the nutritious substrate for the primary anaerobe communities.  相似文献   

The Uryakh ore field (NE Transbaikalia): Formation of structural assemblages in the centroid-type seismic regime     

T. M. Zlobina  V. A. Petrov  V. Yu. Prokofiev  A. A. Kotov  K. Yu. Murashov  A. A. Wolfson 《Doklady Earth Sciences》2016,470(2):1050-1055

Syn-ore centroid type deformations that produced unusual structural assemblages are identified in the Uryakh ore field. The regularities of the deformation process comparable to a mechanism of the centroid-type seismic focus are established. The results of studying fluid inclusions suggest that the pressure—temperature parameters of the system correspond to conditions typical of the seismic regime. A model of formation of structural assemblages in a centroid-type dynamic regime with the participation of fluids is proposed for the first time.  相似文献   

Cambrian Magmatism in the Northern Urals: New Data on the Age and Formation Conditions     

G. A. Petrov  Yu. L. Ronkin  A. Gerdes  A. V. Maslov 《Doklady Earth Sciences》2018,481(2):993-996

Cambrian igneous formations in the Northern Urals were identified and described for the first time. It was established that the Timanide orogeny terminated in the Early Cambrian and was followed by continental rifting above a mantle plume in the Late Cambrian.  相似文献   

Observations of Near-Earth Optical Transients with the Lomonosov Space Observatory     

V. M. Lipunov  E. S. Gorbovskoy  V. G. Kornilov  V. V. Chazov  M. I. Panasyuk  S. I. Svertilov  I. V. Yashin  V. L. Petrov  V. V. Kallegaev  A. A. Amelushkin  D. M. Vlasenko 《Astronomy Reports》2018,62(7):426-435

The results of observations with the MASTER-SHOK robotic wide-field optical cameras onboard the Lomonosov Space Observatory carried out in 2016 are presented. In all, the automated transient detection system transmitted 22 181 images of moving objects with signal-to-noise ratios greater than 5 to the Earth. Approximately 84% of these images are identified with well-known artificial Earth satellites (including repeated images of the same satellite) and fragments of such satellites (space debris), according to databases of known satellites. The remaining 16% of the images are relate to uncatalogued objects. This first experience in optical space-based monitoring of near-Earth space demonstrates the high efficiency and great potential of using large-aperture cameras in space, based on the software and technology of the MASTER robotic optical complexes (the Mobile Astronomical System of TElescope- Robots (MASTER) global network of robotic telescopes of Lomonosov Moscow State University).  相似文献