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51.
E. D. Kuznetsov 《Solar System Research》2011,45(5):433-446
The effect of the radiation pressure and Poynting-Robertson effect on the evolution of the orbits of geosynchronous satellites
is studied, depending on their area to mass ratio. The qualitative changes of the orbital evolution caused by these disturbances
are considered. The reflection coefficient of the satellite’s surface was assumed to be 1.44. In the vicinity of the stable
point with the longitude of 75° the exit from the libration resonance mode was registered when the area to mass ratio value
changed from 5.9 to 6.0 m2/kg; in the vicinity of the unstable point at 345° with the area to mass ratio of 1.4 it occurred at 1.5 m2/kg. Re-entry to Earth occurs at values of the area to mass ratio above 32.2 m2/kg, and hyperbolic exit from the low-Earth orbit occurs at values of the area to mass ratio over 5267 m2/kg. At high values of the area to mass ratio, slopes of initially equatorial orbits can reach 49°. It is shown that due to
the Poynting-Robertson effect the secular decrease in the semimajor axis of orbit in libration resonance region is 3–4 orders
of magnitude less than outside of it. 相似文献
52.
53.
V. P. Yushkov R. D. Kuznetsov M. A. Kallistratova 《Russian Meteorology and Hydrology》2008,33(10):624-631
Results of measurements of mean wind speed profiles and direction during two years in the center of the city of Moscow are presented. These measurements were performed with a Doppler acoustic profiler (sodar), which was used for continuous monitoring of the wind speed within the height range from 40 to 250–500 m. The averaged seasonal mean profiles are presented along with other observational data, including diurnal cycle parameters, wind speed and direction frequencies at chosen levels, and frequencies and duration of strong winds and calm weather. 相似文献
54.
Lipunov V. M. Vladimirov V. V. Gorbovskoi E. S. Kuznetsov A. S. Zimnukhov D. S. Balanutsa P. V. Kornilov V. G. Tyurina N. V. Gress O. A. Vlasenko D. M. Gabovich A. M. Yurkov V. V. Kuvshinov D. A. Senik V. A. 《Astronomy Reports》2019,63(4):293-309
Astronomy Reports - The concept of a multi-functional astronomical complex as applied to robotic astronomy networks and systems is formulated. The practical realization of this concept in the... 相似文献
55.
Certain large magnetic lays, registered by magnetometers in the auroral and subauroral zones simultaneously with SC instant and accompanying events, substantially differ from activations at the beginning of auroral substorm. Such basic substorm elements as energy accumulation during the growth phase and breakup—activation in the localized region near midnight—are absent. During such sudden auroral activations (SAs), a disturbance begins in a wide sector of longitudes and latitudes. It is proposed to combine SAs into an individual class of magnetospheric disturbances. The particle acceleration and injection mechanism, which causes SAs, is considered. 相似文献
56.
Victor G. Kornilov Vladimir M. Lipunov Evgeny S. Gorbovskoy Aleksander A. Belinski Dmitry A. Kuvshinov Natalia V. Tyurina Nikolai I. Shatsky Anatoly V. Sankovich Aleksander V. Krylov Pavel V. Balanutsa Vadim V. Chazov Artem S. Kuznetsov Dmitry S. Zimnuhov Victor A. Senik Andrey G. Tlatov Aleksander V. Parkhomenko Denis V. Dormidontov Vadim V. Krushinsky Ivan S. Zalozhnyh Aleksander A. Popov Sergey A. Yazev Nikolai M. Budnev Kirill I. Ivanov Evgeny N. Konstantinov Oleg A. Gress Oleg V. Chvalaev Vladimir V. Yurkov Yury P. Sergienko Irina P. Kudelina 《Experimental Astronomy》2012,33(1):173-196
Presented paper describes the basic principles and features of the implementation of a robotic network of optical telescopes MASTER, designed to study the prompt (simultaneous with gamma radiation) optical emission of gamma-ray bursts and to perform the sky survey to detect unknown objects and transient phenomena. With joint efforts of Sternberg astronomical institute, High altitude astronomical station of the Pulkovo observatory, Ural state university, Irkutsk state university, Blagoveshchensk pedagogical university, the robotic telescopes MASTER?II near Kislovodsk, Yekaterinburg, Irkutsk and Blagoveshchensk were installed and tested. The network spread over the longitudes is greater than 6?h. A further expansion of the network is considered. 相似文献
57.
E. D. Kuznetsov 《Astronomy Reports》2010,54(6):562-569
It is shown for the two-planetary version of the weakly perturbed two-body problem that, in a system defined by a finite part of a Poisson expansion of the averaged Hamiltonian, only one of the three components of the area vector is conserved, corresponding to the longitudes measuring plane. The variability of the other two components is demonstrated in two ways. The first is based on calculating the Poisson bracket of the averaged Hamiltonian and the components of the area vector written in closed form. In the second, an echeloned Poisson series processor (EPSP) is used when calculating the Poisson bracket. The averaged Hamiltonian is taken with accuracy to second order in the small parameter of the problem, and the components of the area vector are expanded in a Poisson series. 相似文献
58.
59.
60.
N. B. Kuznetsov S. Yu. Orlov E. L. Miller A. V. Shazillo A. V. Dronov A. A. Soboleva O. V. Udoratina G. Gehrels 《Doklady Earth Sciences》2011,438(2):759-765
The first results of U/Pb isotopic dating (LA ICP MS) of detrital zircons from sands from the Middle Cambrian Sablinka Formation,
Upper Cambrian Ladoga Formation, Low Ordovician Tosna Formation, and calcareous sands from Syas’ Formation (Sargaevskii horizon
of the Upper Frasnian) from Baltica-Ladoga Glint (BLG) of the Southern Ladoga area are presented. The obtained ages of detrital
zircons span the intervals 492.7 ± 5.1-3196.4 ± 5.1 Ma (Sablino Formation); 577.9 ± 7–2972.6 ± 13.4 Ma (Ladoga Formation);
509.4 ± 8.5–3247.6 ± 10.1 Ma (Tosna Formation); 451.1 ± 14.7–2442.2 ± 6.9 Ma (Syas’ Formation). A comparison of the obtained
isotopic ages of detrital zircons to ages of crystalline complexes composing the Kola-Karelian, Svecofennian, and Sveconorwegian
domains of Baltic Shield and Pre-Uralian-Timanian structures of Subpolar and Polar Urals and basement of Pechora Basin was
carried out. It is proposed that the Middle Paleozoic sedimentary basin accumulated Upper Frasnian rocks of Syas’ Formation.
The basin ranged northward from the present-day BLG and occupied the eastern part of the Baltic Shield. 相似文献