Space Science and Technology-Kosmicna Nauka i Tehnologia最新文献

{"title":"Formation and development of the Ukrainian network of meteor radio observations","authors":"F. Bushuev, M. Kaliuzhnyi, N. Kulichenko, A. Shulga, Y. Malynovskyi, S. Savchuk, L. Yankiv-Vitkovska, B. Hrudynin","doi":"10.15407/KNIT2021.03.085","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.085","url":null,"abstract":"During the decade of research, the Research Institute “Mykolaiv Astronomical Observatory” (RI “MAO”) developed hardware and software for monitoring, extracting, and calculating the parameters of meteor phenomena using the forward scattering by meteor ionized trail of the signals of over-the-horizon FM-stations broadcasted in the frequency range of 88—108 MHz. This allowed creating a network of observations of meteor phenomena in the radio range, which consists of six stations located in Mykolaiv (three stations), Rivne, Lviv, and Hlukhiv. The stations have identical hardware and software. Yagi-Uda antennas with six or eight horizontal vibrators and SDR receivers based at RTR2832U microchip are used to receive radio signals. The station software performs continuous registration and analysis of received radio signals at the output of quadrature detectors of the receivers, automatic detection of moments of appearances of meteor reflections, formation, and sending by e-mail daily reports on detected meteor phenomena. Equipment setup and current monitoring of stations operations are carried out by the RI «MAO» using remote access to station computers via the Internet. Monthly reports on the number of meteor events recorded by each station are posted on the site of Radio Meteor Observation Bulletin (RMOB). The article presents the results, obtained by the network in 2017—2019, confirming a correspondence of daily variations in the number of meteors registered by network stations, to the known dependence (observation of meteors in the apex and antapex), as well as a correspondence between the expected characteristics (in time and intensity) of three meteor showers (Perseids, Geminids and Quadrantids) and that had been obtained by the network. Recommendations are also given in the article for additional research aimed at achieving the main goal, namely, expanding information about meteor phenomena, including the estimating of kinematic parameters (velocities, radiants) of meteoroids and their relationship with potentially hazardous asteroids.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Institutional and legal model for public procurement of products of Earth observation in Ukraine","authors":"A. Hurova, V. Malolitneva","doi":"10.15407/KNIT2021.03.093","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.093","url":null,"abstract":"The article explores the mechanism of public procurement in the sphere of providing the remote sensing services to public entities. Authors emphasize on the benefits of the centralized procurement of remotely sensed data that will lead to cost savings of state funds through the avoidance of duplicate purchases. Authors give special consideration to the difference in products obtained within the Earth observation (EO) process, the purchase of which can be carried out according to different procedures, as well as the duality of the status of the National Center for the Management and Testing of Space Facilities (NCMTSF) as a supplier and intermediary in public procurement legal relations. It is determined that NCMTSF as a centralized procurement organization will collect requests from contracting authorities (public consumers) for remote sensing services, analyze them for the possibility of satisfying it with products from the existing own fund or the need to purchase remote sensing data. It is argued that in case of impossibility to provide relevant services from the available resources of the remote sensing fund, but economic feasibility of purchasing raw remote sensing data, considering the consolidated application of public consumers, NCMTSF will act as a centralized procurement organization. It is emphasized that, unlike other centralized procurement organizations, the procurement contract with the winner of the procurement will be concluded by NCMTSF. NCMTSF will provide free of charge public authorities, enterprises, institutions, and organizations with raw data information products which were purchased at the expense of state budget according to their requests. It is suggested that in case of impossibility and economic inefficiency of providing data processing services, NCMTSF as a centralized procurement organization organizes procurement in the interests of public consumers. The procurement contract is concluded between the public consumer and the winner of the procurement. That is, in this case, the NCMTSF performs an intermediary function of procurement organization, which can professionally qualify the participants and determine the most economically advantageous tender. In addition, several procedures have been discovered that will unify suppliers’ offers according to contracting authorities’ technical requirements and optimize budget spending, that was based on an analysis of domestic legislation on public procurement and models for the procurement of remote sensing products in space states such as the USA, Australia and India. The article provides an in-depth analysis of the implementation of multi-use supplier list as prequalification system for potential economic operators of remote sensing services.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment perspectives for the orbital utilization of space debris","authors":"A. Alpatov, Yu.M. Goldshtein","doi":"10.15407/KNIT2021.03.003","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.003","url":null,"abstract":"Technogenic pollution of the near-Earth space by fragments of space debris of various sizes significantly limits the possibilities for implementing space activities and represents a great danger to objects on Earth. Low orbits with heights up to 2000 km are particularly heavily clogged. The Inter-Agency Space Debris Coordination Committee recommends removing fragments of space debris from the area of working orbits. Currently, promising ways of space debris removing are considered: descent into the Earth’s atmosphere, relocation to an orbit with a lifetime less than twenty-five years, relocation to an utilization orbit, and orbital disposal. Orbital utilization considers space debris as a resource for the industry in orbit. The objectives of the article are to assess the perspectives for the orbital utilization of space debris and to develop a method for choosing the number and placement of safe recycling orbits in the area of low near-Earth orbits. The paper analyses the prospects for the use of orbital utilization of space debris and the assessment of the possibilities of using orbital storage and subsequent reuse of dismantled space objects, instruments and materials. A number of problems of planning and organizing the orbital utilization of space debris are formulated and solved. A method for determining safe orbits of space debris utilization in the area of low near-Earth orbits based on a criteria system developed. Using the developed method and software package, the possible orbits of space debris utilization in the area of low near-Earth orbits are determined. The lifetime of a space object in the utilization orbit, the stability of the orbit of the utilization at a long time interval, and the energy consumptions for transferring the space object from the working orbit to the utilization orbit are estimated. The novelty of the obtained results consists in the development of a clustering technique for the orbits of utilized space debris objects and the development of a technique for selecting a possible orbit for the utilization of space debris in the area of low near-Earth orbits. The results obtained can be used in the planning and organization of the orbital utilization of space debris.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47885271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On orbit serving — a step towards further exploration of near-Earth space","authors":"V. V. Vasylyev, L. A. Godunok, S. Matviienko, Kyiv Ukraine Production Complex “Kurs”","doi":"10.15407/KNIT2021.03.039","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.039","url":null,"abstract":"The purpose of the publication is to draw the attention of the Ukrainian scientific and technical community to the development of a new area of activity in outer space - orbital service. The content, technical and economic preconditions and competitive advantages of its development in Ukraine are outlined. Definitions of orbital services such as customer inspection, orbital (inter-orbital) transportation, refueling and resupply, upgrade, assembly, collision avoidance are given. The competence of Ukrainian enterprises in this direction has been analyzed. The expediency and possibility of developing the direction of orbital servicing for further exploration of near space, in particular, the developments of Ukrainian enterprises for the development and manufacture of systems for rendezvous and docking of spacecraft, have been substantiated. Scenarios of interaction between a space service vehicle and a client vehicle in near-earth orbit are described. The basic requirements for carrying out of Servicer and the Client autonomous proximity operations, as well as the operation of seizing the client machine are given. Proposals for the functionality of spacecraft for the provision of orbital space services are presented, it is proposed to consider the need to create specialized cargo modules and examples of their application in orbit are given. The tendencies of the approach to the creation of spacecraft structures adapted for in-orbit service are considered. The predicted volume of orbital service operations by type of service and with orbits is given. Provided information about the key players in a given market. The design of Servicer, which is being developed by Kurs NPK JSC, Yuzhnoye Design Bureau, for the provision of transport services, is presented. The specified features of its construction in general and the composition of the modules, as well as the possibility of further expanding the functionality of the Servicer.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Throughput of the optical telescope for observing LEO objects","authors":"О.М. Kozhukhov, Zalistsi Dunaivtsi District Khmelnytsky Region Ukraine Navigating Field Control","doi":"10.15407/KNIT2021.03.028","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.028","url":null,"abstract":"Observation of Low-Earth-Orbit space objects by optical sensors (telescopes) is a rather complex task that requires equipment with appropriate characteristics. Througput can be considered as one of the main characteristics of optical sensors for observing Low-Earth-Orbit space objects. An approach to the theoretical estimation of the optical telescope’s throughput when observing Low-Earth Orbit space objects is proposed in the paper. It is based on the representation of the telescope as a queuing system. The queuing system can be of various types depending on the observation methods that are used. The input flow in this queuing system is the flow of Low-Earth Orbit space objects’ passes through the viewing area of the telescope, and the output flow is the flow of observed passes. The average total time spent for observing one Low-Earth Orbit space object is taken as the average service time. Quantitative characteristics of these values can be obtained by simulating the Low-Earth Orbit space objects’ passes through the telescope's viewing area. The throughput of the queuing system was chosen as the main estimated characteristic. An example of evaluating the characteristics of such a queuing system is given. It is based on the “Sazhen-S” quantum optical station of the Centre for Special Data Reception and Processing and Navigating Field Control of the National Space Facilities Control and Test Center of State Space Agency of Ukraine. Possible ways of increasing the throughput of “Sazhen-S” quantum optical station according to the observation of Low-Earth Orbit space objects are proposed.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47418291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Method of constructing the primary error matrix of the RT-32 radio telescope in an automated mode","authors":"V. Vlasenko, Kyiv Ukraine Test, V. M. Mamarev, V. V. Ozhynsky, O. Ulyanov, V. Zakharenko, M. Palamar, A. Chaikovskyi","doi":"10.15407/KNIT2021.03.066","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.066","url":null,"abstract":"2020 was the year of introduction of the Ukrainian new generation radio telescope RT-32 into the experimental operation. The test results of maser hydrogen and hydroxyl lines obtained during the experimental operation confirmed the correctness of the calculations and technological solutions of Ukrainian scientists and manufacturers Consortium. One of the further development directions of RT-32 as a radio astronomical research tool is to increase the accuracy of pointing the radio telescope to radio astronomical sources. One of the further development directions of RT-32 as a radio astronomical research tool is to increase the accuracy of pointing the radio telescope to astronomical radio sources. The latter is to be achieved by automating the processes of guidance error matrices formation and their integration during the observations. The formation of such a matrix presupposes taking into account the structural features of the antenna system and weather condition. The paper presents the results of geodetic measurements of the antenna system surface on different elevation angle, construction of the 3D model of the reflector. The method of constructing the error matrix, which at this stage of research provides the necessary simplicity of perception and interpretation of the obtained results by the human operator, is proposed. The results of the developed method verification using reference radio sources are given and the error matrices of elevation and azimuth pointing (dimension 81x81 elements) obtained with the use of said method are presented. The introduction of the results presented in the article into the radio telescope control system allowed increasing the accuracy of RT-32 radio telescope pointing in the C- and K- bands to the value of ~36″. This work partially was supported by Latvian Council of Science project \"Joint Latvian-Ukrainian study of peculiar radio galaxy “Perseus A” in radio and optical bands. Nr: lzp-2020/2-0121\".","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The distortion of images in remote sensing systems at arbitrary angles of sight","authors":"V. Kolobrodov, N. I. Lykholit, V. Tiagur, B. Pinchuk, M. M. Lutsiuk","doi":"10.15407/KNIT2021.03.051","DOIUrl":"https://doi.org/10.15407/KNIT2021.03.051","url":null,"abstract":"Background. The main problem in launching space optical and electronic viewing systems (OEVS) for remote sensing of the Earth can be regarded as their high price, which even the leading countries of the world are not always ready to pay. Therefore, the quality of spacecraft systems imposed the most stringent requirements. One of the economically expedient options to increase the efficiency of space OEVS is scanning the Earth’s surface at arbitrary angles of sighting, which allows for the same time of service life to collect more information, but this in turn leads to image distortion. Therefore, analysis of the resulting image quality depending on the angles of sighting of the OEVS is an actual task that will assess the capabilities of the system and its conformance with the established requirements. Objective. Improving the physical and mathematical model of the modulation transfer function of the system “lens – matrix detector” and the study of the dependence of spatial and radiometric resolution on the angles of sight for the space OEVS when the sighting axis deviates from the nadir. Methods. Based on the analysis of signal generation models for television and thermal imaging space OEVS, it is proposed to use the concept – the contrast gray body. In the physical and mathematical model, it is proposed normalize to the spatial frequencies of objects at different angles of sight to the spatial frequencies in the nadir, and to calculate the radiometric resolution take into account the transmission and rarefied of the atmosphere, the image movement speed on the detector and its integration time. Results. Practical results of calculations of the offered physical and mathematical model for space OEVS showed that at deviation from nadir the effective spatial bandwidth worsens and at the specified parameters of system it is inexpedient scanning at angles of sighting greater than 30º. Accordingly, a comparative analysis of radiometric resolution for different type of detectors showed that the use of a photonic detector gives ~1.4 times better resolution in the nadir as opposed to the use of thermal detector and almost identical results are obtained at maximum angles of sighting. Also, a significant impact is made by a decrease a coefficient of atmospheric transmittance due to the rarefied of the atmosphere, which reaches from 26% to 45% that depends on the spectral range. Conclusions. Analysis of the results of the study confirms the possibility that photonic detectors can be replaced by modern thermal detectors with insignificant loss of image quality of the resulting image, which can significantly increase the service life of space OEVS.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48199278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The contribution of Kharkiv enterprises to the rocket and space industry development","authors":"A. Larin, M. Gutnyk, S. Tkachenko, S. O. Horielova, Ukraine Kharkiv","doi":"10.15407/knit2021.04.083","DOIUrl":"https://doi.org/10.15407/knit2021.04.083","url":null,"abstract":"The article reviews the contribution of Ukrainian enterprises to the development of the rocket and space industry. The most important part of a space or combat ballistic missile is the control system (CS), on which the success of its application depends. Kharkov (Kharkiv) enterprises – the “Kommunar” plant and the Design Bureau “Electropriborostroenia” (SDB-692, now the RPA “Khartron”) were the largest manufacturers of control systems not only in Ukraine but throughout the Soviet Union. These systems were not only produced serially but also developed at these enterprises. The formation and development of Kharkov enterprises of the space industry is the most important page in the history of the development of not only cosmonautics but also science and technology. Despite the large number of works devoted to the development of rocket and space technology in Ukraine, the history of the development and production of control systems has not been sufficiently studied. Due to the secrecy of work in the field of rocket and space technology (RST), there are very few sources for studying the history of its creation. Therefore, the most important part of the work was interviewing the leading experts of SDB-692 in the field of the rocket and spacecraft control systems, which included A. M. Kalnoguz, Yu. A. Kuznetsov, V. Ya. Makarenko, V. G. Sukhorebrov and V. A. Uralov. Based on these interviews, a special fund was created in the Central State Scientific and Technical Archive of Ukraine. Control systems for many combat ballistic missiles, including P-7, P-7A, P-12, P-16, as well as the most powerful missile in the world P-36M2, which was named in the USA “Satana” (SS-18 “Satan”), “Proton”, “Zenith”, “Energia”, and “Cyclone” launch vehicles, “Kvant”, “Kvant-2”, “Crystal”, “Priroda”, “Spectrum” orbital modules, more than 150 satellites of the “Cosmos” series, and other objects were developed and serially produced at Kharkov enterprises. In the 1970s, SDB-692 created the USSR’s first onboard digital electronic computer. On its basis, a test and launch complex “Electronic launch” was developed, designed for pre-launch testing of control systems for ballistic missiles and launch vehicles.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Approach to solution of tank with hydrogen peroxide pressurization by its decomposition products","authors":"M. V. Andriievskyi, Y. Mitikov","doi":"10.15407/knit2021.05.003","DOIUrl":"https://doi.org/10.15407/knit2021.05.003","url":null,"abstract":"Aim. To find and confirm the possibility of hydrogen peroxide tank pressurization using high-temperature pressurization gas (~1100К) with a high percentage of steam (up to 70%) without its losses. Research methods. Mathematical modeling of pressurization system parameters with the theory of mass transfer and thermodynamic of variable mass bodies have been used. Results. The conducted research allowed us to find and confirm the possibility of using a new pressurization method with additional sources of heat and elaborate recommendations for its appliance during pressurization time. Scientific novelty. The main processes have been determined, which prevent implementation of the efficient high-temperature pressurization system of the tank with the hydrogen peroxide using peroxide decomposition products. The main obstacle is the volume condensation of vapor in the free volume of the tank when heat exchange processes with boundary surfaces take place. For the first time, by means of theoretical calculations, the expediency and rationality of using the additional sources of heat such as high-temperature combustion product of solid-fuel gas generator based on sodium azide have been proved. Using of this additional source for the first 30 seconds of engine operation has been proved. Practical value. Methodology of pressurization system parameters’ calculation was supplemented with discovered thermodynamic relation, which allowed us to calculate the amount of vapor and take some measures to eliminate the condensation. Results of the research allowed the designation of the pressurization system for the highly concentrated hydrogen peroxide tank with a high value of length to diameter relation with its high-temperature decomposition products.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal strength of retention compartment interacting with exhaust gas","authors":"M. Degtyarev, Dnipropetrovsk Ukraine Yangel Yuzhnoye State Design Office, D. Akimov, A. Bilous, K. Avramov","doi":"10.15407/knit2021.04.003","DOIUrl":"https://doi.org/10.15407/knit2021.04.003","url":null,"abstract":"The thermal strength of the retention compartment is calculated to analyze the possibility of multiple use for a rocket start. The transient heat field of the retention compartment, which is induced by the interaction of the exhaust gas with the retention compartment, is analyzed. The part of the retention compartment undergoes significant heat action with a high-temperature gradient when the rocket is started. This heat action essentially changes in time. This leads to the generation of significant transient stress fields. The aim of the present paper is the calculation of the maximal values of stresses induced by the heat field. We analyze the stress state induced by the steady-state heat field. This field corresponds to the transient heat field at the time when the maximal temperature gradient is observed. The upper bound of stresses in the retention compartment is obtained by the suggested method.","PeriodicalId":42936,"journal":{"name":"Space Science and Technology-Kosmicna Nauka i Tehnologia","volume":null,"pages":null},"PeriodicalIF":0.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67116729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}