Перегляд за Автор "Sukhov, P. P."

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    COMPARISON OF EFFICIENCY OF LOCAL THRESHOLDING ALGORITHM AND THE PROPOSED ALGORITHM FOR SEGMENTATION OF SPACE OBJECTS’ (SO) IMAGES AGAINST THE STARRY SKY BACKGROUND
    (Astroprint, 2010) Strygin, N. Z.; Sukhov, P. P.; Karpenko, G. F.
    In the article are presented comparative results of the space objects separation algorithms test on the television images of the sidereal sky regions - both the local thresholding method with the scanning apertures of various sizes and the new algorithm developed at the ОАО. Advantages of the ОАО algorithm are shown.
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    Degradation of the reflectance properties of some GSS in space, preliminary results
    (Одеський національний університет імені І. І. Мечникова, 2020) Sukhov, P. P.; Sukhov, K. P.
    A spacecraft in near-Earth orbit is exposed to extreme environmental factors, such as high vacuum, zero gravity, collisions with meteors and orbital debris, corpuscular and electromagnetic radiations, etc. These factors result in changing properties of spacecraft surfaces which leads to changes in mechanical, optical, electrical and physical properties of materials and elements of spacecrafts. This paper presents experimental data obtained from ground-based photometric observations of several geostationary satellites (GSS) built on different types of buses, starting from the beginning of their operational lives and during several years after their launches. It has been experimentally proved that spectral reflectance properties of the satellite surface materials undergo gradual degradation with time of the satellite’s stay in space. Noticeable changes in spectral reflectance properties of GSS make it possible to detect damages to the satellite external payload. Comparison of changes in the reflective characteristics of different platforms over time can show the level of technical and scientific progress of spacecraft designers.
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    Determination degradation of satellite surface optical features by photometric method
    (Одеський національний університет імені І. І. Мечникова, 2022) Sukhov, P. P.; Yepishev, V. P.; Sukhov, K. P.; Pavlovskyi, Alexei L.; Mamrai, Sergei A.; Сухов, Петро Петрович
    A method is described for using photometric data to estimate the reflective properties of a satellite's surface material under conditions of its long stay in space. The technique of multicolour photometric B,V,R observations of several geostationary satellites built on different types of tires is shown, and the results obtained over a period of 3 to 9 years. These are geostationary satellites Astra 2E (on the Eurostar E3000 bus), Azerspace- 2/Intelsat 38 (on the SSL-1300 bus), Sicral 2 (on the Spacebus-4000B2 platform) and Blagovest 11L (the Ekspress-2000 bus). It has been revealed that a pattern of change in the reflectivity of different geostationary satellites is dissimilar. Spacecraft materials used for the surfaces of geostationary satellites manufactured in the second decade of the 21st century are more resistant to the harsh space environment than those used for the satellites built in the late 20th century. We have proposed several ways of improving the method for identifying the spacecraft material type based on multicolour photometric observations. The presented results show that the proposed photometric method works and can be used for detecting spacecraft surface degradation.
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    Determination of external GSS payload from light curves
    (Одеський національний університет імені І. І. Мечникова, 2022) Sukhov, P. P.; Yepishev, Vitaly P.; Sukhov, Konstantin P.; Сухов, Петро Петрович
    They are offered reflective features to external surface geostationary satellites on which possible identify the separate external construction geostationary satellites. Such constructions can be; the type and forms radio antennas, solar panels, thermo film on surfaces of the platform. They are given to recommendations and specified moments of time, condition, under which possible find the external payload. The paper presents the results of colorimetric observations of 5 GSS of multipurpose operation, on the platform of which an external payload in the form of several radio antennas was found, and in some cases the orientation and technical characteristics of the GSS were estimated.
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    IDENTIFICATION OF GEOSTATIONARY SATELLITES BY THEIR PHOTOMETRIC AND DYNAMIC FEATURES, SOME PROBLEMS
    (Astroprint, 2015) Sukhov, P. P.; Sukhov, K. P.
    It is possible to identify certain characteristics of geostationary satellites by studying their photometry. This paper reviews some of the technical problems and methodologies concerning photometry of satellites, as well as their identification by photometric characteristics. The existing methods of identifying geostationary satellites using photometry are also summarized. The present Database of photometric and dynamic characteristics of the GSS, additional information, simplifying the input of the inverse problem  all this allows modern methods to identify unknown GSS with a probability up to 80%.
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    Monitoring of space objects using Odessa Observatory network of telescope
    (2019) Andrievsky, Serhii M.; Bazyey, N. V.; Zhukov, V. V.; Koshkin, Nikolay I.; Kashuba, V. I.; Kashuba, S. V.; Gorbanev, Yuriy M.; Sukhov, P. P.; Podlesnyak, S. V.; Udovichenko, S. N.; Keir, L. E.; Андрієвський, Сергій Михайлович; Андриевский, Сергей Михайлович; Кошкін, Микола Іванович; Кошкин, Николай Иванович; Горбаньов, Юрій Михайлович; Горбанёв, Юрий Михайлович
    In this paper we are presenting optical telescopes of Astronomical Observatory of I. I. Mechnikov Odessa National University. We are describing technical characteristics and scientific program for each telescope. Here we also present a description of the tools with which the unique collections of astroplates were obtained under the program “The Sky Service”. Odessa Observatory (46°.28 N, 30°.45 E, altitude 64 m, observation code 086) it has several observational stations. Among them: Mayaki (46.39° N, 30°.27 E, altitude 25 m, observation code 583) and Kryzhanovka (46°.37 N, 30°.48 E, altitude 40 m, observation code A85). Both stations have a good geographical location, as well as good astroclimate (up to 200 clear nights or part of the night). Telescopes are equipped with modern CCDs and photometric light detectors. Odessa Observatory has its own mechanical and optical workshops that are used for construction the new telescopes and manufacture and repair other astronomical equipment.
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    ON THE ADVANTAGES OF PHOTOMETRIC OBSERVATIONS OF THE GEOSTATIONARY SATELLITES AT SMALL PHASE ANGLES
    (Astroprint, 2014) Sukhov, P. P.; Karpenko, G. F.; Sukhov, K. P.; Epishev, V. P.; Motrunych, I. I.; Kudzej, I.; Dubovsky, P. A.
    As a rule, to determine photometric and dynamic characteristics of geostationary satellites required for their identification, long-lasting (from a half of the year to one year) photometric observations are needed at GSS different positions relative to the observer. The authors suggest conducting photometric measurements of GSS when they enter and exit the Earth's shadow near equinoxes. On these dates the GSS brightness increases by several magnitudes, so the use of telescopes with a mirror diameter of 50-70 cm can be effective. For shorter periods it is possible to get more information about the reflective properties of the object than during long-term observations at large phase angles. Several examples of photometric and dynamic characteristics of several GSS obtained near equinoxes are presented here.
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    PHOTOMETRICAL RESEARCH OF GSS «INTELSAT 10-02»
    (Astroprint, 2010) Sukhov, P. P.; Karpenko, G. F.; Epishev, V. P.; Motrunych, I. I.
    On example of the studies the obtained coordinate and photometrical data GSS «Intelsat 10-02» is shown as possible surveillance with the help of ground-based optical facilities dynamic state satellite and his behaviors on orbit. The analysis of variation character of the light curves in B,V,R filters, time intervals between the flashes, the color indexes variation shows that the systems of stabilization of the platform, the transceiving antennas and the solar panels worked in operating normal mode during the dates of observation. The solar panels orientation relative to the Sun maintains well enough, rotated practically along the equtor plane tracking the Sun’s path (the Earth’s rotation). Orientation to axis of the rotation of the platform practically remains to be unchanged to direction on the centre of the masses of the Earth.