Processes of Relaxation in the Ultraviolet Band Spectrum by High Velocity Interaction of Exhaust Products on ISS (Relaksatsia-Groza (Relaxation-Thunderstorm)) - 07.15.14
ISS Science for Everyone
Science Objectives for Everyone Relaksatsiya (Relaxation) makes UV spectrometer observations of the chemiluminescent reactions in the Xenon plasma from firings of the two PCUs (plasma contactor units) installed on the U.S. Z1 truss.
Science Results for Everyone
Sponsoring Space Agency
Russian Federal Space Agency (Roscosmos)
ISS Expedition Duration
December 2001 - September 2013
Previous ISS Missions
Investigation of chemiluminescent chemical reactions and atmospheric optical phenomena occurring during high-speed interaction between jet engine exhausts and the Earth's upper atmosphere, atmospheric optical phenomena during re-entry of bodies into rarified upper atmosphere and its optical properties in the UV range.
UV camera, Spectrometer, Video camera, set of interference filters.
Conducting radiometric and spectrometric measurements in the UV range: Radiation emitted in reactions of interaction between ISS RS propulsion system exhaust products and atomic oxygen; Radiation emitted in reactions of interaction of Soyuz and Progress propulsion system exhaust products during undocking maneuvers, retroburns and re-entry into the Earth's upper atmosphere; Spacial distribution and emission spectra of atmospheric formations and phenomena.
Determining the effects of propulsion system exhausts on the Earth's upper atmosphere and ISS environment on optically sensitive surfaces (windows, equipment lenses, solar array panels). In perspective, simulation of atmospheric optical phenomena in ultra-violet, visible and near-infrared spectral bands (Earth atmosphere nightglow, SC re-entry glow, planetary atmospheric glow).
Karabadzhak GF, Komrakov GP, Kuznetsov VD, Plastinin YA, Ruzhin YY, Frolov VL, Khmelinin BA. ISS-based study of global spatiotemporal glowing of the Earth`s upper atmosphere and ionosphere under radiofrequency emission impact on them . Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2009; 57(4): 88-94.
Karabadzhak GF, Plastinin YA, Rodionov AV, Szhenov EY, Sipachev GF, Khmelinin BA. Spectrosegmental Studies in Superlow Natural and Man-Made Emissions in the Earth Upper Atmosphere and Ionosphere. Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2007; 49(4): 26-32.
Karabadzhak GF. Revelation of the effective cross-section of the O + H2O = OH (A) + OH (X) reaction during hypervelocity collisions of components by measuring the intensity of hydroxyl glow in the course of space experiments. Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2004; 36(3): 123-130.
Plastinin YA, Karabadzhak GF, Khmelinin BA. Remote Measurement of the atomic oxygen distribution in Earth atmosphere from International Space Station. 46th Aerospace Sciences Meeting and Exhibit, Reno, NV; 2008
Anfimov NA, Zemlyanskiy BA, Karabadzhak GF, Plastinin YA. Study of Earth's atmosphere and ionosphere from the ISS. Polyot. 2007(12): 3-10.
Karabadzhak GF, Krasotkin VS, Manzhaley AI, Plastinin YA, Khmelinin BA. ISS-based observation of a European ATV cargo vehicle entering the Earth's atmosphere with the Fialka–MV-Kosmo multispectral system . Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2010; 59(2).
Zemlyanskiy BA, Karabadzhak GF, Plastinin YA. The Relaxation Space Experiments: Scientific Objectives, Instruments and Results of the Studies at the International Space Station Russian Segment. Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2007; 49(4): 33-40.
Plastinin YA, Rizvanov AA, Sipachev GF, Khmelinin BA. Space-based UV survey of thunderous formations in the Earth's upper atmosphere . Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2011; 63(2): 123-132.
Karabadzhak GF, Plastinin YA, Szhenov EY, Khmelinin BA. Specification of oxygen atom concentration profiles in Earth`s upper atmosphere basing on experimental data received from manned space stations . Kosmonavtika i Raketostroenie (Cosmonautics and Rocket Engineering). 2007; 46(1): 38-43.
Ground Based Results Publications
Coordinating Scientific and Technical Council of the Russian Space Agency [Russian]
Energia - Science Research on the ISS Russian Segment
Fialka-MV-Kosmos multispectral UV system.
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