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Six-impulse maneuvers for rendezvous of spacecraft in near-circular noncoplanar orbits
Springer Science and Business Media LLC - Tập 50 - Trang 441-448 - 2012
The problem of a rendezvous of two spacecraft in close near-circular noncoplanar orbits is considered. The angles of applying velocity impulses and their orientation are determined from necessary conditions of optimality derived using the basis vector theory. For non-degenerate six-impulse solutions the analytical formulas are found that approximate the dependence of moments of applying velocity i......
Families of Periodic Solutions to the Beletsky Equation
Springer Science and Business Media LLC - - 2002
A review of achievements in the investigation of the planar periodic oscillations and rotations of a satellite around its center of mass, which moves along an elliptic orbit in the central gravitational field, is presented. These oscillations and rotations of the satellite are described by an ordinary differential equation (Beletsky equation) of the second order with periodic coefficients and two ......
Magneto-ionospheric effects of active experiments conducted on February 18, 2004
Springer Science and Business Media LLC - Tập 49 - Trang 292-307 - 2011
Results of radiophysical and magnetometric observations of dynamical processes in the ionosphere and geomagnetic field that followed launches of four rockets of different power and made from different launching sites are analyzed. It is found that the rocket launches were accompanied by an intensification of wave activity in the ionosphere and geomagnetic field. The medium reactions from various s......
A Technique for Estimating the Space Debris Density from the Data of Onboard Recording Systems
Springer Science and Business Media LLC - Tập 41 - Trang 204-208 - 2003
A three-dimensional mathematical model and a program complex for modeling the external effect of small-sized space debris particles on a spacecraft are developed. On the basis of the rectangular contributions method a new technique is developed for restoring the density of small-sized space debris from a small number of recorded debris collisions with recording sensors. From the form of the densit......
Comparison of the effects induced by the ordinary (O-mode) and extraordinary (X-mode) polarized powerful HF radio waves in the high-latitude ionospheric F region
Springer Science and Business Media LLC - - 2018
Stationary Nose Structures of Protons in the Inner Magnetosphere: Observations by the ION Instrument onboard the Interball-2 Satellite and Modeling
Springer Science and Business Media LLC - Tập 41 - Trang 3-12 - 2003
Nose structures are objects formed by H+ particles penetrating into the inner magnetosphere [1, 2]. We present the results of experimental studies and numerical modeling of the nose structures. Statistical processing of the observations of nose structures in 1997 by the ION instrument onboard the Interball-2 satellite at heights of 10 000–15 000 km demonstrates that the probability of formation of......
Determination of two Satellites’ relative motion using tracking measurements
Springer Science and Business Media LLC - Tập 46 - Trang 523-528 - 2008
A technique to determine the initial relative velocity of two satellites at the initial time instant, based on the results of NORAD system’s measurements, is presented. The determination of a relative initial position is shown to result in the unsatisfactory accuracy. This technique is applied to determining the initial velocity of separation of the first Russian nanosatellite TNS-0 from the Inter......
On increasing the spectral efficiency and transmissivity in the data transmission channel on the spacecraft–ground tracking station line
Springer Science and Business Media LLC - Tập 56 - Trang 75-83 - 2018
The algorithms for achieving a practical increase in the rate of data transmission on the space-craft–ground tracking station line has been considered. This increase is achieved by applying spectral-effective modulation techniques, the technology of orthogonal frequency compression of signals using millimeterrange radio waves. The advantages and disadvantages of each of three algorithms have been ......
Satellite Measurements of Plasma Disturbances and Electric Currents Induced in the Midlatitude Ionosphere Modified by High-Power HF Radio Waves
Springer Science and Business Media LLC - Tập 59 - Trang 231-249 - 2021
We have analyzed the experimental data obtained in 2016–2019 from the measurements of plasma disturbances and electric currents induced at ionospheric altitudes upon the modification of the F2 region of the midlatitude ionosphere by means of high-power HF radio waves emitted by the SURA heating facility. The measurements were carried out using the onboard instruments of the SWARM satellites. The c......
Criteria of applicability of a gas-dynamic approximation of a continuous medium to describing the dispersion of combustion products of rocket propellants
Springer Science and Business Media LLC - Tập 52 - Trang 185-188 - 2014
Two criteria for the applicability of a gas-dynamic approximation of continuous medium to describing the dispersion of combustion products of rocket propellants at high altitudes are formulated. Related numerical estimates are given for different launch vehicles and one upper stage with fairly extended boost phases. The use of a continuous medium approximation is shown to have a clear altitude res......
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