Subjects -> ASTRONOMY (Total: 94 journals)
Showing 1 - 46 of 46 Journals sorted alphabetically
Advances in Astronomy     Open Access   (Followers: 49)
Annual Review of Astronomy and Astrophysics     Full-text available via subscription   (Followers: 50)
Annual Review of Earth and Planetary Sciences     Full-text available via subscription   (Followers: 67)
Artificial Satellites     Open Access   (Followers: 21)
Astrobiology     Hybrid Journal   (Followers: 11)
Astronomical & Astrophysical Transactions: The Journal of the Eurasian Astronomical Society     Hybrid Journal   (Followers: 7)
Astronomical Review     Open Access   (Followers: 5)
Astronomische Nachrichten     Hybrid Journal   (Followers: 4)
Astronomy & Geophysics     Hybrid Journal   (Followers: 49)
Astronomy and Astrophysics     Full-text available via subscription   (Followers: 67)
Astronomy and Computing     Hybrid Journal   (Followers: 6)
Astronomy Letters     Hybrid Journal   (Followers: 22)
Astronomy Reports     Hybrid Journal   (Followers: 22)
Astronomy Studies Development     Open Access   (Followers: 15)
Astroparticle Physics     Hybrid Journal   (Followers: 10)
Astrophysical Bulletin     Hybrid Journal   (Followers: 4)
Astrophysics     Hybrid Journal   (Followers: 35)
Astrophysics and Space Science     Hybrid Journal   (Followers: 49)
Astrophysics and Space Sciences Transactions (ASTRA)     Open Access   (Followers: 60)
Astropolitics: The International Journal of Space Politics & Policy     Hybrid Journal   (Followers: 13)
Celestial Mechanics and Dynamical Astronomy     Hybrid Journal   (Followers: 15)
Chinese Astronomy and Astrophysics     Full-text available via subscription   (Followers: 25)
Colloid Journal     Hybrid Journal   (Followers: 2)
Comptes Rendus : Physique     Open Access   (Followers: 2)
Computational Astrophysics and Cosmology     Open Access   (Followers: 6)
Earth and Planetary Science Letters     Hybrid Journal   (Followers: 143)
Earth, Moon, and Planets     Hybrid Journal   (Followers: 47)
Earth, Planets and Space     Open Access   (Followers: 77)
EAS Publications Series     Full-text available via subscription   (Followers: 8)
EPL Europhysics Letters     Partially Free   (Followers: 8)
Experimental Astronomy     Hybrid Journal   (Followers: 38)
Expert Opinion on Astronomy and Astrophysics     Open Access   (Followers: 8)
Extreme Life, Biospeology & Astrobiology - International Journal of the Bioflux Society     Full-text available via subscription   (Followers: 4)
Few-Body Systems     Hybrid Journal   (Followers: 1)
Foundations of Physics     Hybrid Journal   (Followers: 40)
Frontiers in Astronomy and Space Sciences     Open Access   (Followers: 15)
Galaxies     Open Access   (Followers: 6)
Globe, The     Full-text available via subscription   (Followers: 3)
Gravitation and Cosmology     Hybrid Journal   (Followers: 6)
Icarus     Hybrid Journal   (Followers: 71)
International Journal of Advanced Astronomy     Open Access   (Followers: 21)
International Journal of Astrobiology     Hybrid Journal   (Followers: 4)
International Journal of Astronomy     Open Access   (Followers: 22)
International Journal of Astronomy and Astrophysics     Open Access   (Followers: 36)
International Journal of Satellite Communications Policy and Management     Hybrid Journal   (Followers: 15)
International Letters of Chemistry, Physics and Astronomy     Open Access   (Followers: 8)
ISRN Astronomy and Astrophysics     Open Access   (Followers: 14)
Journal for the History of Astronomy     Full-text available via subscription   (Followers: 20)
Journal of Astrobiology & Outreach     Open Access   (Followers: 5)
Journal of Astronomical Instrumentation     Open Access   (Followers: 3)
Journal of Astrophysics     Open Access   (Followers: 33)
Journal of Astrophysics and Astronomy     Open Access   (Followers: 58)
Journal of Atmospheric and Solar-Terrestrial Physics     Hybrid Journal   (Followers: 133)
Journal of Geophysical Research : Planets     Full-text available via subscription   (Followers: 116)
Journal of Geophysical Research : Space Physics     Full-text available via subscription   (Followers: 136)
Journal of High Energy Astrophysics     Full-text available via subscription   (Followers: 25)
Kinematics and Physics of Celestial Bodies     Hybrid Journal   (Followers: 11)
KronoScope     Hybrid Journal   (Followers: 1)
Macalester Journal of Physics and Astronomy     Open Access   (Followers: 5)
Monthly Notices of the Royal Astronomical Society     Hybrid Journal   (Followers: 13)
Monthly Notices of the Royal Astronomical Society : Letters     Hybrid Journal   (Followers: 2)
Nature Astronomy     Hybrid Journal   (Followers: 14)
New Astronomy     Hybrid Journal   (Followers: 26)
New Astronomy Reviews     Full-text available via subscription   (Followers: 19)
Nonlinear Dynamics     Hybrid Journal   (Followers: 19)
NRIAG Journal of Astronomy and Geophysics     Open Access   (Followers: 4)
Physics of the Dark Universe     Open Access   (Followers: 4)
Planetary and Space Science     Hybrid Journal   (Followers: 106)
Planetary Science     Open Access   (Followers: 52)
Proceedings of the International Astronomical Union     Full-text available via subscription   (Followers: 2)
Publications of the Astronomical Society of Australia     Hybrid Journal   (Followers: 3)
Publications of the Astronomical Society of Japan     Hybrid Journal   (Followers: 4)
Research & Reviews : Journal of Space Science & Technology     Full-text available via subscription   (Followers: 20)
Research in Astronomy and Astrophysics     Full-text available via subscription   (Followers: 38)
Revista Mexicana de Astronomía y Astrofísica     Open Access   (Followers: 3)
Science China : Physics, Mechanics & Astronomy     Full-text available via subscription   (Followers: 4)
Science China Physics, Mechanics & Astronomy     Hybrid Journal   (Followers: 4)
Solar Physics     Hybrid Journal   (Followers: 29)
Solar System Research     Hybrid Journal   (Followers: 15)
Space Science International     Open Access   (Followers: 118)
Space Science Reviews     Hybrid Journal   (Followers: 92)
Space Weather     Full-text available via subscription   (Followers: 27)
Transport and Aerospace Engineering     Open Access   (Followers: 13)
Universe     Open Access   (Followers: 6)
Similar Journals
Journal Cover
Solar System Research
Journal Prestige (SJR): 0.332
Number of Followers: 15  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1608-3423 - ISSN (Online) 0038-0946
Published by Springer-Verlag Homepage  [2469 journals]
  • Nonthermal Atmospheric Loss of the Sub-Neptune π Men c Due to
           Exothermic Photochemistry

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      Abstract: We estimated the contribution of reactions of exothermic photochemistry, namely, the dissociation of molecular hydrogen, by extreme UV radiation and the accompanying flux of photoelectrons, to the formation of a fraction of suprathermal atomic hydrogen in the Н2 → Н transition region of the extended upper atmosphere of an exoplanet—the hot sub-Neptune π Men c and the formation of the corresponding escape flux from the atmosphere. We calculate the formation rate and the energy spectrum of hydrogen atoms, which are formed with the excess of kinetic energy when H2 dissociates. With a numerical stochastic model of a hot planetary corona, we study at the molecular level the kinetics and transfer of suprathermal hydrogen atoms in the extended upper atmosphere and calculate the nonthermal escape flux. The escape flux has been estimated as 2.5 × 1012 cm–2 s–1 for moderate activity of the star in the UV-radiation range, from which an upper estimate for the rate of the atmospheric loss caused by the Н2 dissociation processes has been found at 6.7 × 108 g s–1. The calculated value is close to the estimates of the possible atmospheric loss rate obtained in observations of the exoplanet π Men c in the range no higher than 1.0 × 109 g s–1. The rate of the atmospheric loss due to suprathermal hydrogen atoms, which was estimated in calculations for the exoplanet π Men c, may be considered as a mean value, since the calculations were performed for the conditions corresponding to moderate UV-radiation activity of the star and the smallest values of the probabilities for predissociation of the excited electron levels of a Н2 molecule. We recommend this source of suprathermal hydrogen atoms to be included to the current aeronomic models of physical and chemical processes in the upper atmospheres of hot exoplanets.
      PubDate: 2022-04-01
       
  • Spectral Signs of Simultaneous Sublimation Activity and the Appearance of
           a Dust Exosphere on Eight Asteroids of the Main Belt Near Perihelion

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      Abstract: — In December 2020, at the 2-m telescope of the Terskol branch of the Institute of Astronomy, we carried out spectrophotometric observations in the range of ~0.36–0.95 μm of nine asteroids of the Main Belt (19 Fortuna, 52 Europa, 102 Miriam, 177 Irma, 203 Pompeja, 250 Bettina, 266 Aline, 379 Huenna, and 383 Janina), which were near perihelia of their orbits with significant eccentricities, in order to determine the effect of maximum subsolar temperatures on them. The study of the reflecance spectra of asteroids showed that the mineralogy of their matter is low-temperature and basically corresponds to the previously established classification (Tholen, 1989; Bus and Binzel, 2002). But in the spectra of eight asteroids (with the exception of 102 Miriam), for the first time, significant deviations were found that go beyond the spectral boundaries of their taxonomic types in the absence of noticeable changes in the spectral transparency of the Earth’s atmosphere at time intervals shorter and longer than the exposure time. Such features can be interpreted as light scattering by a mobile (or inhomogeneous) dusty exosphere that forms near these asteroids near perihelion in the process of ice sublimation at the highest subsolar temperatures. In addition, as follows from the data obtained from the GOES-16 and SOHO satellites, the considered asteroids at the end of November 2020 (10 days before the start of our observations) were affected by a strong solar flare in the X-ray range, and then by a shock wave in solar wind caused by a coronal mass ejection on the Sun, which was quasi-synchronous with the X-ray flare. This probably led to an additional increase in the sublimation activity of the asteroids and manifestations of a derivative dusty exosphere.
      PubDate: 2022-04-01
       
  • Transport Characteristics of a Hierarchical Near-Surface Layer of the
           Nucleus of Comet 67P/Churyumov–Gerasimenko

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      Abstract: — In this paper, we develop previous studies that considered a free molecular gas flow through a dust porous mantle of a cometary nucleus. Before, we considered various types of both homogeneous and heterogeneous layers built of nonintersecting spheres, including the layers containing microscopic cracks and inner cavities. At the same time, data from the Rosetta space mission provide convincing evidence that the near-surface layer is composed of porous aggregates rather than homogeneous solids. In this study, we propose models, in which the layer is constructed of porous aggregates formed by ballistic agglomeration. The effective porosity of the model layers is in a range of the values resulting from the analysis of observations of comet Churyumov–Gerasimenko. With the test-particle method, we quantitatively estimated the distribution functions for the free paths, the layer’s permeability, and the other effective kinetic characteristics of sublimation products that passed through a nonisothermal porous layer. In addition, we estimated the volume adsorption of the visible solar light in the near-surface absorbing layer. For all of the considered transport characteristics, we present approximating expressions that may effectively be used in nonstationary thermophysical models of the physics of a cometary nucleus.
      PubDate: 2022-04-01
       
  • Coronae of Venus: Geological, Topographic and Morphometric Characteristics

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      Abstract: — Coronae are large (up to 2500 km in diameter) annular landforms of Venus, the defining structural element of which is the annular framing, consisting of densely packed grooves/ridges. We carried out a detailed photogeological and topographic analysis of 550 coronae and found the following: (1) coronae with younger edging from rift fissures are characterized by a topographic profile with a dominant central dome (class D); this profile probably characterizes the progressive evolutionary stage of the parent diapir. (2) coronae of the transitional type with a frame consisting of groove belts and rift fissures more often have a profile with a central uplift surrounded by one or more concentric depressions (class W); such a profile may correspond to the transition from the progressive to the regressive stage of diapir evolution. (3) Coronae framed by more ancient groove belts or morphologically weakly expressed in relief. They have a profile in the form of a topographic depression (class U), the bottom of which can be complicated by one or more ring uplifts. This profile may be related to the regressive stage of diapir evolution. Apparently, the characteristic topographic profiles of coronae correspond to different stages of their formation and evolution of parental diapirs. The significantly smaller number of D-shaped coronae in comparison with the W and U class coronae indicates a significant decrease in the rate of mantle diapirism at the later stages of the geological history of Venus.
      PubDate: 2022-04-01
       
  • Dynamic Evolution of Pairs of Trans-Neptunian Objects

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      Abstract: A search for pairs of trans-Neptunian objects in close orbits with semimajor axes of more than 30 AU has been performed. Distances in space of Keplerian orbits were estimated using the Kholshevnikov metrics. We revealed 26 pairs of trans-Neptunian objects with metrics less than 0.07 (AU)1/2. Based on nominal orbits, the dynamic evolution of pairs of trans-Neptunian objects in the past over a time interval of 10 million years has been studied numerically. For the pair 2003 QL91—2015 VA173, a study of probabilistic evolution was carried out in the past over a time interval of 10 million years. Estimates of the age of pairs of trans-Neptunian objects obtained by various methods: analysis of low-speed approaches of objects, convergence of orbits, approaches of lines of nodes and apses, give conflicting results. The age of most of the pairs considered exceeds 10 million years.
      PubDate: 2022-04-01
       
  • Special Groups of Potentially Hazardous Asteroids

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      Abstract: — The groups of asteroids which can have approaches to two or more planets have been determined. It is shown that in the phase space of the orbital elements there are regions in which asteroids can be for a long time, potentially hazardous for all the inner planets of the Solar System at the same time. Further study of such objects is necessary, including obtaining new observations.
      PubDate: 2022-01-01
      DOI: 10.1134/S0038094622010026
       
  • Simulation of Water Vapor Photodissociation during Dust Storm Season on
           Mars

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      Abstract: — Within the framework of this work, using a three-dimensional numerical model of the general circulation of the Martian atmosphere MAOAM (Martian Atmosphere: Observation and Modeling), also known as MPI-MGCM (Max Planck Institute Martian General Circulation Model), we simulated the planet’s hydrological cycle during the 28 and 34 Martian years (MY28 and MY34) dust storm seasons. A quantitative assessment of the photodissociation of water vapor under the influence of solar radiation at the Lyman-alpha wavelength has been carried out. The simulation results are compared with individual profiles obtained with the Atmospheric Chemistry Suite (ACS) spectrometer installed on the ExoMars Trace Gas Orbiter (TGO) spacecraft. The MAOAM model has a spectral dynamical core and successfully predicts the temperature regime of Mars through the use of physical parameterizations that are characteristic of both Earth and Martian models. The hydrodynamic block of the model includes the transfer scheme, microphysics of water vapor and ice, heterogeneous nucleation, sedimentation, photodissociation, and exchange of water with the surface. Studies show the effect of dust storms on both the total water vapor content in the atmosphere and its vertical distribution. More intense pumping of water vapor into the upper atmosphere during dust storms provides more intense photodissociation of water vapor (in some seasons up to 6.5 tons per second in total in the entire atmosphere). The strongest photodissociation is observed at heights of 50 to 80 km for MY34 and 70 to 80 km for MY28. The dissociated water vapor can then potentially become a source of hydrogen dissipation into space, followed by a decrease in the mass of water on the planet.
      PubDate: 2022-01-01
      DOI: 10.1134/S0038094622010051
       
  • Collocation Integrator Lobbie in Orbital Dynamics Problems

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      Abstract: — The paper investigates the efficiency of the new collocation integrator Lobbie, presented in (Avdyushev, 2020), in comparison with other integrators widely used in practice, namely, collocation Runge–Kutta, extrapolation Gragg–Bulirsch–Stoer, multistep Adams–Multon–Bashforth integrators, and also with the Everhart integrator, well known in celestial mechanics. The integrators are tested in orbital dynamics problems. In particular, a comparative analysis of efficiency shows that when simulating a complex orbital motion (strongly elliptical or with gravity assist maneuvers), Lobbie excels the other integrators (except Everhart) by several times in performance, and by several orders of magnitude in accuracy. A correct comparison of the efficiency of the Everhart integrator and Lobbie is not possible, since they have no common orders: the former has only odd orders on the Radau spacings, while the latter has only even orders on the Lobatto spacings. Nevertheless, if we compare the efficiency of integrators of adjacent orders, then in the strongly elliptic case the Everhart integrator (with a higher order) is one order of magnitude inferior to Lobbie in accuracy. Another advantage of Lobbie is that it allows solving mixed systems of differential equations of the second and first orders, which, for example, are used in celestial mechanics to study dynamic chaos, as well as to linearize, regularize, and stabilize the equations of motion. To use the Everhart integrator to solve such systems, all second-order equations must be reduced to first-order ones. However, as applied to systems of first-order equations, the efficiency of the Everhart integrator becomes noticeably worse.
      PubDate: 2022-01-01
      DOI: 10.1134/S0038094622010014
       
  • The δ-Cancrids Meteor Complex

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      Abstract: — In studying the connections of the δ-Cancrids (DCA) meteor stream, consisting of the northern (NCC) and southern (SCC) branches, with the comet–asteroid complex, the structure of the shower was studied using visual and television observations. According to visual observations, it was found that for meteors with a minimum recorded stellar magnitude of +3m and brighter, the maximum of activity ZHR = 8.6 ± 1.8 is observed at the Sun’s longitude 298.5° ± 1.2°, while the parameter r of the luminosity function during the period of the shower activity varies in the range of 1.5–2.0. For meteors weaker than +3m, the moment of maximum occurs 1.4° later than for brighter meteors. For the orbits of meteors of the NCC and SCC branches, obtained from television observations, the dependence of the values of the semimajor axes and eccentricities on the mass of meteoroids was also revealed. The orbit separation time for the δ-Cancrid meteors in the meteor magnitude range from 0m to +3m due to the nongravitational Poynting–Robertson effect is 22–26 thousand years for the southern branch SCC, and 24–29 thousand years for the northern branch NCC.
      PubDate: 2022-01-01
      DOI: 10.1134/S0038094622010063
       
  • Rotational Dynamics and Evolution of Planetary Satellites in the Solar and
           Exoplanetary Systems

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      Abstract: In this review we consider the main rotation regimes that are inherent for planetary satellites of the Solar System, satellites of trans-Neptunian objects, and potential satellites of extrasolar planets. Both the findings of classical theoretical studies and the recent conclusions on the observed rotational dynamics of satellites and their long-term dynamical tidal evolution are described. We concentrate on a regime of a satellite’s rotation that is synchronous with its orbital motion and is observed for all major planetary satellites (radius of the figure larger than ~500 km). We also consider irregularly shaped minor satellites (with a figure radius less than ~300 km), rotating regularly and much faster than in the case of synchronous rotation. The regime of chaotic rotation (tumbling) observed for the seventh satellite of Saturn, Hyperion, is analyzed at length. We also discuss the possibility of chaotic rotation of other minor satellites. Results and research prospects for the rotational dynamics of exomoons are presented.
      PubDate: 2022-01-01
      DOI: 10.1134/S003809462201004X
       
  • Chandrasekhar’s Integral Equilibrium Theorems Modified in the Context of
           

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      Abstract: A generalization of Chandrasekhar’s integral theorems on the equilibrium for matter and blackbody radiation in a protostellar gravitating spherically symmetric cloud has been obtained in the context of Kaniadakis nonextensive kappa statistics. The elements of deformed thermodynamics for an ideal gas, the deformed canonical Gibbs distribution, and the effective gravitational constant calculated in the Verlinde formalism are used for this purpose. The deformation parameter \(\kappa \) measures the so-called degree of nonextensiveness of the cloud system. In addition, modified thermodynamic properties of blackbody radiation are discussed in the context of Kaniadakis statistics, in particular, the κ-analog of Stefan’s law for radiation energy and generalized expressions for the entropy, thermal capacity, and radiation pressure. The presented method of combining these anomalous physical processes provides an alternative to the well-known Chandrasekhar’s integral theorems for spherically symmetric gas configurations in a state of hydrostatic equilibrium, and restores all standard expressions in the limit κ → 0. The approach developed in this study can be used to construct new models of the evolution of nonextensive protostellar objects and stars.
      PubDate: 2022-01-01
      DOI: 10.1134/S0038094622010038
       
  • The Indo-Russian UV Spectrograph Project for the Chinese Space Station
           (SING)

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      Abstract: Abstract—The ultraviolet wavelength range (90–300 nm) is one of the most important parts of the electromagnetic spectrum for astrophysicists. The success of the GALEX and ASTROSAT/UVIT missions has given a new view on the ultraviolet sky with unprecedented detail of extended objects, such as planetary nebulae or supernova remnants. Direct images of the sky allow us to track the morphology of such objects, but provide very limited information about their physical conditions: temperature, density, and radiation fields. Spectroscopic observations make it possible to study local physical conditions, but usually only at one point in an extended nebula. Our proposed long-slit spectrograph (SING, Spectroscopic Investigation of Nebular Gas) will allow tracking emission lines across the entire spatially extended nebulae in the wavelength range of 140–270 nm, which is the key to understanding their dynamics and evolution. The spectrograph will operate onboard the Chinese space station. The article describes the scientific tasks for which this unique device is created, its main characteristics and preliminary design.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070169
       
  • Calculating the Structural Vibration Loading Applied to Spacecraft Using
           Dynamic Analysis

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      Abstract: — The paper presents the methodological basis and results of analyzing conditions under which the vibration loading is applied to structural components inside the spacecraft when the impact is generated by internal source (the correction engine). The engine operations are accompanied by pressure pulses inside the combustion chamber.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070200
       
  • Controlled Pressurization of the Rocket Tank

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      Abstract: Abstract—To ensure high reliability requirements of the pressurization control unit, the regulators are made redundant. Failure of any regulator in the open position is compensated by closing the shut-off valve installed in front of the regulator. If the pressure in the tank exceeds the permissible value, a safety valve opens, the sensitive element of which is combined with the sensitive elements of the regulators. The performance of the pressurization control unit is validated by the results of autonomous and flight tests.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070212
       
  • Radiation Conditions on the Flight Trajectory and Aboard the Spacecraft
           for Studying the Main Belt Asteroids

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      Abstract: Abstract—Radiation conditions on the flight path and aboard the spacecraft for studying three main-belt asteroids are discussed. Differential energy spectra of charged particles on the flight trajectory and the doses absorbed at the locations of onboard spacecraft equipment are calculated. Based on the calculated results, recommendations are made regarding the radiation resistance of components of electronic radio equipment (ERE).
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070108
       
  • WSO–UV Project: New Touches

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      Abstract: Abstract—A general description is given of the international (with Russia as the key contributor) project World Space Observatory–Ultraviolet (WSO–UV; in Russian named SPEKTR–UF). The project is aimed at creating a large space observatory for observation in the UV part of the spectrum (110–310 nm). The project has been underway for quite a long time. There are no outstanding engineering issues. Because of several factors not related to technology, the launch of the observatory has been postponed to 2025. The cushion of time allows for a possibility of improvements in the project scheme. The scientific program has been refined; a new design of the field camera has been prepared; a new spectrograph will be installed according to the cooperation agreement between Roscosmos and JAXA (Japan); a new, more optimal orbit has been selected; a system for collecting proposals has been developed and an experimental call for proposals has been launched, etc. Thus, the overall picture of the project has acquired new touches. This paper briefly describes the current status of the project, focusing on these new touches.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070194
       
  • Application of the Hybrid Extended Kalman Filter to Identify Parameters of
           the Inertial Measurement Unit of the Spacecraft Onboard Software

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      Abstract: Abstract—Inertial measurement units (IMUs) used in spacecraft for measuring their angular velocity vectors have certain features. IMU characteristics can be identified and orientation parameters can be estimated directly onboard the spacecraft during angular motion control using an extended Kalman filter. As a rule, this problem is solved by ground-based means of the Mission Control Center based on the results of telemetry processing. The article considers the possibility of automating the process by including appropriate algorithms in the onboard software of the spacecraft.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070157
       
  • Theoretical and Experimental Study of Subsonic Gas Flow Around the Frontal
           Aerodynamic Screen After Separation from the ExoMars Vehicle Descending in
           the Atmosphere of the Planet

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      Abstract: Abstract—The results of numerical and experimental determination of the aerodynamic characteristics of the frontal screen and analysis of the vortex structure of the flow in the bottom area and the near trace of the screen when it falls free at subsonic speed after separation from the main structure of the EXOMARS lander to the surface of the planet are presented.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070030
       
  • Mathematical Modeling and Analysis of Aerodynamic and Thermal Effects on
           the Descent Module of the Spacecraft ExoMars-2020 During Soft Landing

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      Abstract: Abstract—Results of a numerical study of the flow structure occurring between the descent module and landing surface during the braking maneuver of the propulsion system are presented. Data on the force and thermal effect of the emerging flow on the descent module are given, depending on its distance and orientation relative to the landing surface and amount of the braking engine thrust. The pictures of the arising unsteady vortex motion of the medium are presented.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070042
       
  • Background of Design Selection of Engineering Materials for Construction
           of Precision Space Structures

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      Abstract: Abstract—The article reviews some engineering materials applied in construction of precision space structures; the criteria and algorithms of the optimal choice and features of the application technology are shown.
      PubDate: 2021-12-01
      DOI: 10.1134/S0038094621070121
       
 
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