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«Russian Journal of Astrophysical Research. Series A» – scientific journal.

E-ISSN 2413-7499
Issued one time a year.
Issued from 2015.

1 June 20, 2019

Articles and Statements

1. M. Adar, Y. Najih, M. Mabrouki, A. Chebak, M. El idrissi
Simulation Study of Three Solar PV Grid-Conected Systems

Russian Journal of Astrophysical Research. Series A, 2019, 5(1): 3-16.
DOI: 10.13187/rjar.2019.1.3CrossRef

In this paper, a performance analysis of three grid-connected PV systems in Beni Mellal weather conditions was carried out using PVsyst software and the monitored data. The PV system consists of polycrystalline silicon (pc-si), monocrystalline silicon (mc-si) and amorphous (a-si) solar cell technologies. The predicted annual production is found to be around 3733.1 kWh, 3716.5 kWh and 3543.8 kWh for the mc-si, pc-si and a-si technologies, respectively. The performance analysis has showed that the predicted annual average value of PR ratio for the a-si is nearly 83.8 %, 80.5 % for mc-si and 80.1 % for pc-si plant. The analysis of actual operating data has revealed that the annual average value of PR of pc-si, mc-si and a-si technologies are quantifiable at 86.80 %, 84.87 % and 83.60 %, respectively.

URL: http://ejournal28.com/journals_n/1563538436.pdf
Number of views: 984      Download in PDF

2. Vladimir P. Kulagin
Comet Hazard

Russian Journal of Astrophysical Research. Series A, 2019, 5(1): 17-26.
DOI: 10.13187/rjar.2019.1.17CrossRef

The article explores the problem of comet hazard. This problem is isolated from the problem of asteroid-comet hazard due to essential features. Features comets are described in the article. The classification of comets is given in the work. The article analyzes the origin of comets. The structure of the comet is investigated in the aspect of the object that poses a threat in collision with the Earth. As an example, four famous comets are considered. The article reveals the content of the information approach to the study of the problem of comet hazard. The article identifies the main objectives of the information approach: informational description of comets, dynamic modeling of the behavior of comets, forecasting the situation with a comet, cataloging dangerous space bodies.

URL: http://ejournal28.com/journals_n/1563538502.pdf
Number of views: 1070      Download in PDF

3. Takaaki Musha
Electrogravitic Originated Mass of the Sun

Russian Journal of Astrophysical Research. Series A, 2019, 5(1): 27-33.
DOI: 10.13187/rjar.2019.1.27CrossRef

The hypothesis that the Sun may carry an electric charge was proposed by prof. Bailey at first in 1960 for the explanation of the maximum energy found for a primary cosmic ray particle and other astronomical phenomena. According to the electrogravitic theory by T. Musha and B.V. Ivanov, it can be shown that the stars like the Sun has a possibility to have a gravity mass generated by its electric charge.

URL: http://ejournal28.com/journals_n/1563538580.pdf
Number of views: 1021      Download in PDF

4. Vladimir V. Oznamets, Viktor Ya. Tsvetkov
Space Geodesy of Small Celestial Bodies

Russian Journal of Astrophysical Research. Series A, 2019, 5(1): 34-40.
DOI: 10.13187/rjar.2019.1.34CrossRef

The article explores the features of the use of space geodesy in the description of small celestial bodies. The paper shows the difference between geodesic astronomy and space geodesy. The paper shows the difference between ground geodesy, astronomy and space geodesy. The main stages of cartographic modeling are described. Cartographic modeling of space bodies or space mapping includes three stages. The first stage transforms the original cosmic body into a reference geometric body. The reference geometric body is transformed at the second stage into a geometric figure having a scan. The geometric shape is converted to a flat scan in the third stage. Conformal transformations are the basis for the implementation of the second and third stages. Problems appear at the first stage of spatial transformations. The irregularity of the cosmic body creates significant distortions in the construction of its surface. The authors of the article propose geodetic modeling and geodesic constructions as an alternative. Geodesic space modeling is a generalization of geodetic and photogrammetric measurements. For small space those use photogrammetric measurement methods. Geodesic modeling allows you to create a three-dimensional triangulation model. The article confirms the conclusion that geometry, geodesy and geoinformatics are applicable for the study of space bodies.

URL: http://ejournal28.com/journals_n/1563538638.pdf
Number of views: 1039      Download in PDF

5. Viktor P. Savinych
Planetary Research Information Systems

Russian Journal of Astrophysical Research. Series A, 2019, 5(1): 41-55.
DOI: 10.13187/rjar.2019.1.41CrossRef

The article explores information systems for planetary research. The article reveals the principles of building information systems. The result of the information system is structured information and knowledge. The primary function of an information system is the structuring and systematization of initial information. The article introduces the concept of object and spatial space analysis. The principles of operation of information systems are described. The article conducts a comparative analysis of planetary systems. The features of various information planetary systems are described. Modern information systems on a planetary theme perform accumulative functions. They perform poorly analytical functions.

URL: http://ejournal28.com/journals_n/1563538890.pdf
Number of views: 1054      Download in PDF

full number
URL: http://ejournal28.com/journals_n/1563538905.pdf
Number of views: 1033      Download in PDF

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