排序方式： 共有11条查询结果，搜索用时 15 毫秒
1.
We investigate the evolution of high Earth satellite orbits under gravitational perturbations from the Sun and light pressure forces, without the Earth shadow effect. We present the disturbing function of the problem provided that the satellite is a sphere. The mean value of the disturbing function in the absence of resonances between the mean unperturbed motion of the satellite and the mean motion of the Sun has also been obtained. The semimajor axis of the satellite orbit and the mean value of the disturbing function are shown to be integrals of the averaged osculating equations. TheHill version of the problem, whereby the distance to the satellite is much smaller than the Earth–Sun distance, has been studied in detail: we have constructed the phase portraits of the oscillations at various parameters and described three types of quasiperiodic satellite trajectories—librational and rotational trajectories as well as Earth collision trajectories. Numerical simulations of trajectories have allowed the additional effects caused by light pressure to be described: the displacement of the bounded trajectory of the satellite as a whole relative to the trajectory of the classical three-body problem into a region more distant from the Sun. 相似文献
2.
Astronomy Letters - We consider the spatial restricted circular three-body problem in the nonresonant case. The massless body (satellite) is assumed to have a large sail area and, therefore, the... 相似文献
3.
M. I. Beloglazov V. M. Demkin A. A. Krasilnikov L. M. Kukin Yu. Yu. Kulikov V. G. Ryskin V. N. Shanin 《Geomagnetism and Aeronomy》2010,50(2):256-262
As a result of the long-term observations lead in region of Kola Peninsula, connection between character of variations of
the ozone content in a stratosphere of Arctic regions and behavior and structure of a winter polar vortex is established.
During winter seasons with well developed cyclone and duration of stable existence not less than 1.5–2 months were observed
extremely low ozone number density at heights 20–25 km connected, apparently, with its chemical destruction. On the other
hand, during disturbances of the vortex, accompanied strong stratospheric warming, was registered almost double increase of
ozone amount in a high-altitude interval from 20 up to 40 km. Comparison of results of ground-based microwave monitoring of
an ozone layer to data of the satellite instrument EOS MLS installed on satellite AURA is lead. In most cases comparison has
shown satisfactory within the limits of an error of measurements coincidence of results. However in conditions of atmospheric
disturbances when arose significant spatial heterogeneity, the discrepancy of results of comparison was marked. The possible
reasons which cause the detected disagreement in results are discussed. 相似文献
4.
On the stabilization of the collinear libration points of the restricted circular three-body problem
The possibility of stabilizing the collinear libration points of the circular restricted three-body problem by using an additional jet acceleration (constant in magnitude) is investigated. Three stabilization laws are considered when the jet acceleration is either directed continuously to one of the primariesm
1,m
2 or is parallel to the line joining them. The solution of the problem formulated is based on the method of the driving forces structure analysis created by W. Thomson and P. Tait. It is shown that none of the stabilization laws mentioned ensures the existence of the isolated minimum of changed potential energy, and therefore the secular stability of the collinear libration points is impossible. In the 3rd and 4th paragraphs the possibility of a gyroscopic stabilization of these points is considered. It is shown that the gyroscopic stabilization of the external libration points is possible only when jet acceleration is either directed to the distant mass or is parallel to the line joining the primaries. The necessary and sufficient conditions of the gyroscopic stabilization are given. It is also shown that the internal libration points cannot be stabilized by any of the laws considered. For the Earth-Moon system the numerical data of time-existence of the satellite in the vicinity of the libration point situated near the Moon are given. 相似文献
5.
Krasilnikov S. S. Basilevsky A. T. Ivanov M. A. Krasilnikov A. S. 《Solar System Research》2021,55(2):83-96
Solar System Research - The geomorphological and geological analysis of the surface of three primary and ten secondary landing ellipses (15 × 30 km) for the Russian Luna-Glob automated... 相似文献
6.
Previously we have reported the detection of a sequence of three particle arrival events at energies above 1019 eV during one day and from a small sky region by two extensive air shower (EAS) arrays. We have shown that the probability of a chance coincidence of the three events is very low and suggested the arrival of a short-lived particle beam at the Earth. Here we refine the energies of the recorded particles and discuss a possible beam formation mechanism that explains the observational results.
相似文献7.
Solar System Research - The work carried out a comprehensive analysis of engineering and scientific requirements within the main landing ellipses of the Luna-25 expedition. To detail the landing... 相似文献
8.
Ice deposits of the permanent northern polar cap of Mars exhibit a clearly expressed layered structure connected with consecutive accumulation of a solid phase of H2O (ice) with different impurity fractions of dust. The observed structure of the northern polar cap deposits is direct evidence of the uneven accumulation of ice associated with climate variations on Mars over a long period of time. Outside the boundaries of the present northern polar cap, there are isolated remnant massifs of bright deposits with a clearly distinguishable layered structure. In this paper, we analyze the morphology, spatial distribution, and material composition of remnant massifs within the latitude belt of 60°–85°. The similarity in the structure and material composition found in the remnant massifs and the layered deposits of the northern polar cap of Mars apparently suggests that these formations were genetically connected in the past climatic epochs. 相似文献
9.
A. T. Basilevsky Yu. V. Skorov S. F. Hviid S. S. Krasilnikov U. Mall H. U. Keller 《Solar System Research》2018,52(6):505-517
Morphologic analysis of the fragments (500 × 500 pixels) of images of comet 67P/Churyumov? Gerasimenko obtained with the OSIRIS camera for 18 regions, where the consolidated material is exposed on the surface, has been carried out. In terms of resolution, the images form a series from 0.04 to 1.29 m/pixel; consequently, the areas covered by these fragments vary from 400 to ~400000 m2. In all of the regions, lineaments resembling tension fractures—several dozens of structures per region—are seen; and their number scarcely changes when passing from high-resolution images to lower-resolution ones. It is clear that relatively small lineaments cease to be reliably distinguished when the image resolution worsens, but the largest and well-defined ones remain observable, while the number of larger lineaments grows proportionally to the survey area increasing. Undoubtedly, this is an observational effect, which was demonstrated by examples with an artificially worsened resolution. However, on the other hand, this means that the tension fractures of the consolidated nucleus material represent a hierarchic population of smaller (meters long) to larger (decameters and longer) features. The lineaments seen in the analyzed fragments of images were counted, their lengths were measured, and the spacings (the mean distances between lineaments) and, from them, the depths of penetration of fractures into the nucleus material were estimated. It has been shown that the mean length of lineaments within each studied region depends on its area (which here correlates with the image resolution) and the depths of fracture penetration into the nucleus body depends on the mean length of lineaments. Both dependences are close to a power law. In the images of four regions covering the areas from 100000 to 400000 m2 with a resolution of 0.66?1.29 m/pixel, the structures that look like layering or sheet jointing are seen in addition to fracture lineaments. The tension fractures are apparently formed due to seasonal and diurnal variations of the temperature, while the nature of the formation of the layer-like structures is not yet fully understood. 相似文献
10.
Basilevsky A. T. Michael G. G. Krasilnikov S. S. Kozlova N. A. 《Solar System Research》2020,54(5):361-371
Solar System Research - The paper discusses three types of processes of destruction of small lunar craters: (1) destruction by overlapping craters; (2) destruction due to filling with ejecta from... 相似文献