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1.
B. B. Kreisman 《Cosmic Research》2011,49(4):325-334
In the context of the restricted circular three-body problem a method for constructing families of periodic orbits is described.
Each orbit contains a segment of transfer from artificial satellite orbit of a smaller body to an orbit around L
1 or L
2 points of the Sun-Earth and Earth-Moon systems, a segment of multiple flyby of this libration point, and a segment of return
to the artificial satellite orbit. Dependences of velocities at the pericenter on the pericenter radius are given. 相似文献
2.
A. V. Bogomolov I. N. Myagkova V. V. Kalegaev S. I. Svertilov V. V. Bogomolov M. I. Panasyuk V. L. Petrov I. V. Yashin 《Cosmic Research》2017,55(6):446-456
The work is devoted to observations of sharp growths of magnetospheric electron fluxes in the vicinity of the polar boundary of the outer radiation belt of the Earth according to the data of measurements on the Vernov and Lomonosov satellites. This precipitation was observed at the high-latitude boundary of the outer radiation belt toward the equator from the isotropization boundary, and can be caused by scattering waves of various physical natures, including electromagnetic and electrostatic waves. 相似文献
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4.
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As a result of processing long (up to 144 h) series of sunspot magnetograms obtained on the SOHO (Solar and Heliospheric Observatory) spacecraft with the MDI (Michelson Doppler Imager) instrument it is shown that the mode
with a period of 800–1300 min is a limiting low-frequency oscillation mode of the magnetic field of a sunspot as a whole.
Its period is essentially and nonlinearly depends on the sunspot magnetic field strength. In addition to this mode, higher
harmonics are also revealed in the sunspot oscillation spectra in the bands 40–45, 60–80, 135–170, 220–250, and 480–520 min.
The oscillation power in these bands monotonically and rapidly decreases with increasing frequency, which is characteristic
for overtones arising due to the nonlinear nature of oscillations. The limiting oscillation mode stably exists in sunspots
for 1.5–2 days, which coincides with the average lifetime of a supergranular cell. The mode with the period of 35–48 h observed
in the power spectrum is not an eigen mode of sunspots, because its period is independent of its magnetic field strength.
Probably, it occurs as a quasiperiod of an external exciting force caused by disturbances from supergranular cells surrounding
the sunspot. 相似文献
6.
7.
S. O. Karpenko N. V. Kupriyanova M. Yu. Ovchinnikov V. I. Penkov A. S. Selivanov O. E. Khromov 《Cosmic Research》2010,48(6):517-525
The results of designing the attitude control system of the first Russian nanosatellite TNS-0 no. 1 providing orientation of its longitudinal axis along the local geomagnetic field induction vector are presented. The system
consists of a permanent magnet and two sets of hysteresis rods. The magnetic and geometric parameters of the magnet and rods
are calculated. The influence of the permanent magnet field on the hysteresis rods and mutual influence of the rods in the
case of compact satellite packaging are analyzed. Examples of calculations of transient processes and steady-state angular
satellite motion are presented. 相似文献
8.
M. I. Panasuyk V. V. Kalegaev I. N. Myagkova N. V. Kuznetsov M. V. Podzolko 《Cosmic Research》2017,55(6):464-468
Factors of radiation environment in near-Earth space in a period from December 1 to 10, 2014 have been analyzed, which could affect serviceability of the onboard systems of Vernov spacecraft. 相似文献
9.
The results of a preliminary analysis of microperturbations on the International Space Station during physical exercises of the crew are presented. The goal of this paper is to identify the parameters of perturbations
when physical exercises are performed. The results of measurements by sensors of microaccelerations of both Russian and American
segments during physical exercises in the service module of the Russian segment are analyzed. 相似文献
10.
The results of investigating free oscillations of the International Space Station construction appearing during spacecraft docking and undocking are described. The study is carried out using the measurement
data of the low-frequency MAMS accelerometer. Several intervals of measurements performed in 2005 and 2006 were chosen to
be studied. For chosen intervals, only the data intervals corresponding to the process of free attenuation of the oscillations
construction elements were analyzed. Characteristic frequencies of elastic oscillations of the station construction and attenuation
coefficients corresponding to them are found. The comparative analysis of the results obtained for various docking ports (nodes)
is carried out. The described study is performed as a part of the technical experiment “The ISS Environment” carried out onboard the station in accordance with the Russian program of scientific and engineering experiments. 相似文献
11.
V. V. Sazonov 《Cosmic Research》2011,49(5):407-423
The results of reconstruction of uncontrolled rotational motion of the Foton-12 satellite using the measurement data of onboard sensors are presented. This problem has already been solved successfully
several years ago. The satellite motion was reconstructed using the data of measuring the Earth’s magnetic field. The data
of measuring the angular velocity and microaccelerations by the QSAM system were actually not used for this purpose, since
these data include a clearly seen additional component whose origin was at that time unclear. This component prevented one
from using these data directly for reconstruction of the angular motion. Later it became clear that the additional component
was caused by the Earth’s magnetic field. Discovery of this fact allowed us to make necessary corrections when processing
the QSAM system data and to use them for reconstruction of rotational motion of Foton-12. Below, a modified method of processing the QSAM system data is described together with the results of its application. The
main result is obtained by comparing the motion reconstructed from measurements of angular velocity or acceleration with that
found by way of processing the measurements of the Earth’s magnetic field. Their coincidence turned out to be rather accurate. 相似文献
12.
Low fluxes of protons with energies 0.3–10 MeV were studied during 21–23 solar cycles as a function of the MgII index using the data of the instruments CPME, EIS (IMP8), and EPHIN (SOHO). It has been shown that a) during quiet time of solar activity the fluxes of protons (background protons) have a positive
correlation with the MgII index value throughout the solar cycle, b) specific features of variations of the MgII index during the solar minima of 1986–1987 and 1996–1997 can be considered, as well as variations of background fluxes of
low energy charged particles, to be manifestations of the 22-year magnetic cycle of the Sun, and c) periods of the lowest
value of the MgII index are also characterized by the smaller values of the ratio of intensities of protons and helium nuclei than in other
quiet periods. A hypothesis is put forward that acceleration in a multitude of weak solar flares is one of the sources of
background fluxes of low energy particles in the interplanetary space. 相似文献
13.
In 1964, during flights of the ELECTRON satellites the narrow belts of energetic electrons (E
e ≈ 6MeV) have been discovered in the Earth’s magnetosphere at L ≈ 2.75. The same structures approximately at the same magnetic shells were found in 2004 by the CORONAS-F and SERVIS-1 satellites. A comparison of the results of these experiments is presented. It is shown that the additional narrow belts of
energetic electrons occur after intense magnetic storms (D
st
> 100 nT), in our cases, having a double-triple structure. The lifetime of these belts is a few months and their disappearance
had a gradual character. The obtained results separated in time by 40 years suggest the constancy of the sources of particles
of the Earth’s radiation belts and processes occurring in the magnetosphere, which ensures not only existence of the radiation
belts, but also the recurrence of various exotic phenomena in the belts similar to the belt of energetic electrons at the
inner magnetic shells. 相似文献
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15.
G. K. Garipov P. A. Klimov V. S. Morozenko M. I. Panasyuk B. A. Khrenov 《Cosmic Research》2011,49(5):391-398
Using a detector of near ultra-violet (UV) emission (wavelength range 300–400 nm) [1] onboard the Universitetsky-Tatiana satellite with an orbit height of 950 km and inclination of 81° we have detected and studied short UV flashes [2–5]. In this
paper the observed UV flashes are classified according to the type of their time profiles, and the times of emission intensity
rise and decay are investigated in every flash. Using the data on time profiles it turned out to be possible to estimate the
flash energy in the atmosphere even in case of saturation of a signal measuring channel at the maximum of emission. The energy
spectrum of observed flashes is estimated. Time and energy characteristics of the flashes are important for choosing a model
of development of electric discharges in the upper atmosphere that are responsible for observed emission. 相似文献
16.
D. V. Chugunin 《Cosmic Research》2009,47(6):449-459
Characteristics of polar wind fluxes at a height of ∼20000 km measured by the Hyperboloid mass-spectrometer installed onboard
the Interball-2 satellite are presented in the paper. The characteristics are presented for the upwelling flows of ionospheric ions H+, He+, and O+ from the sunlit polar cap in the period of solar activity minimum. Orbit segments with minimal precipitation of magnetospheric
ions and electrons were preliminarily selected, and the measurements where the fluxes of ions coming from the cusp/cleft were
excluded as carefully as possible. Thus, the densities, field-aligned velocities, and temperatures of ions in the regions
where fluxes of polar wind could be detected with the maximal probability degree are presented in the paper. It is found that
cases when only H+ ions are reaching the detector are with high probability the polar wind outflows. Their characteristics agree well with the
Tube-7 hydrodynamic model and are as follows: n ≈ 1.5 cm−3, V
∥ ∼ 21 km/s; T
∥ = 3500 K, and T
⊥ = 2000 K. In cases when He+ and O+ ions are also detected, the temperatures are substantially higher than the model ones, and the measured field-aligned velocities
of O+ fluxes are several times higher than the model ones. Moreover, it was revealed that the polar wind outflows are predominantly
observed in the polar cap regions where the polar rain fluxes are very small. 相似文献
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18.
Yu. R. Banit M. Yu. Belyaev T. A. Dobrinskaya N. I. Efimov V. V. Sazonov V. M. Stazhkov 《Cosmic Research》2005,43(2):131-142
We describe the method and results of determination of the inertia tensor of the International Space Station using telemetry data related to its attitude motion and the total angular momentum of gyrodines. A linear system of differential equations describing the variation of the total angular momentum of gyrodines on some time interval is derived on the basis of the data related to the station orientation in the same time interval. This linear system represents the theorem related to the variation of the total angular momentum of the station and gyrodines and takes into account the action of gravitational and aerodynamic moments upon the station. The solution to the system depends linearly on the components of the inertia tensor of the station and on the parameters specifying the aerodynamic moment. The estimates of these quantities are carried out by the least squares method on the condition of the best approximation by the solutions to the considered linear system of the telemetry values of the total angular momentum of the gyrodines.__________Translated from Kosmicheskie Issledovaniya, Vol. 43, No. 2, 2005, pp. 135–146.Original Russian Text Copyright © 2005 by Banit, Belyaev, Dobrinskaya, Efimov, Sazonov, Stazhkov. 相似文献
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20.
When designing the radio-electronic equipment for long-term operation in a space environment, one of the most important problems is a correct estimation of radiation stability of its electric and radio components (ERC) against radiation-stimulated doze failures and one-particle effects (upsets). These problems are solved in this paper for the integrated microcircuits (IMC) of various types that are to be installed onboard the Fobos-Grunt spacecraft designed at the Federal State Unitary Enterprise “Lavochkin Research and Production Association.” The launching of this spacecraft is planned for 2009.__________Translated from Kosmicheskie Issledovaniya, Vol. 43, No. 3, 2005, pp. 237–239.Original Russian Text Copyright © 2005 by Kuznetsov, Popov, Khamidullina. 相似文献