Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 13703 10.12737/22283 Results of current research Results of current research Results of current research Parameters of optical signals registered with the AZT-33IK telescope in active Radar–Progress space experiment Parameters of optical signals registered with the AZT-33IK telescope in active Radar–Progress space experiment Еселевич Максим Викторович Eselevich Maxim Viktorovich mesel@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Хахинов Виталий Викторович Khakhinov Vitaliy Viktorovich khakhin@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Клунко Евгений Владимирович Klunko Evgeny Vladimirovich eklunko@gmail.com Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation 24 10 2016 24 10 2016 2 3 32 42 https://naukaru.ru/en/nauka/article/13703/view

Images of Progress cargo spacecraft (PCS) and areas around them were captured by the AZT-33IK optical telescope (Sayan Observatory of ISTP SB RAS) during sessions of the active Radar–Progress space experiment. We took images of exhaust and fuel jets when propulsion systems worked and after they were cut off, during fuel system purging. In different sessions of the experiment, PCS had different orientations relative to the telescope, thus enabling us to find some parameters of the observed phenomena. These parameters allow us to determine instants of engine ignitions, to estimate velocities of the jets, and, if necessary, to control geometry of the space experiment. The paper reports common features of optical signals from jets measured in these experiments.

Images of Progress cargo spacecraft (PCS) and areas around them were captured by the AZT-33IK optical telescope (Sayan Observatory of ISTP SB RAS) during sessions of the active Radar–Progress space experiment. We took images of exhaust and fuel jets when propulsion systems worked and after they were cut off, during fuel system purging. In different sessions of the experiment, PCS had different orientations relative to the telescope, thus enabling us to find some parameters of the observed phenomena. These parameters allow us to determine instants of engine ignitions, to estimate velocities of the jets, and, if necessary, to control geometry of the space experiment. The paper reports common features of optical signals from jets measured in these experiments.

 Active space experiment Optical signal Spacecraft Low Earth orbit Telescopic observations Active space experiment Optical signal Spacecraft Low Earth orbit Telescopic observations

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