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Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2

Okada, Tatsuaki (författare)
Institute of Space and Astronautical Science, Japan; Aerospace Exploration Agency, Sagamihara, Japan Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo, Japan
Fukuhara, Tetsuya (författare)
Rikkyo University, Tokyo, Japan
Tanaka, Satoshi (författare)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
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Taguchi, Makoto (författare)
Rikkyo University, Tokyo, Japan
Imamura, Takeshi (författare)
Graduate School of Frontiers Sciences, The University of Tokyo, Kashiwa, Japan
Arai, Takehiko (författare)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
Senshu, Hiroki (författare)
Planetary Exploration Research Center, Chiba Institute of Technology, Narashino, Japan
Ogawa, Yoshiko (författare)
Center for Advanced Information Science and Technology, University of Aizu, Aizu-Wakamatsu, Japan
Demura, Hirohide (författare)
Center for Advanced Information Science and Technology, University of Aizu, Aizu-Wakamatsu, Japan
Kitazato, Kohei (författare)
Center for Advanced Information Science and Technology, University of Aizu, Aizu-Wakamatsu, Japan
Nakamura, Ryosuke (författare)
National Institute for Advanced Industrial Science and Technology, Tokyo, Japan
Kouyama, Toru (författare)
National Institute for Advanced Industrial Science and Technology, Tokyo, Japan
Sekiguchi, Tomohiko (författare)
Hokkaido University of Education, Asahikawa, Japan
Hasegawa, Sunao (författare)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
Matsunaga, Tsuneo (författare)
Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Japan
Wada, Takehiko (författare)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
Takita, Jun (författare)
Graduate School of Science, The University of Tokyo, Bunkyo, Tokyo, Japan
Sakatani, Naoya (författare)
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan
Horikawa, Yamato (författare)
Department of Space and Astronautical Science, School of Physical Sciences, Graduate University for Advanced Studies, Sagamihara, Japan
Endo, Ken (författare)
Center for Advanced Information Science and Technology, University of Aizu, Aizu-Wakamatsu, Japan
Helbert, Jörn (författare)
Institute of Planetary Research, German Aerospace Center (DLR), Berlin, Germany
Müller, Thomas G. (författare)
Max-Planck Institute for Extraterrestrial Physics, Garching, Germany
Hagermann, Axel (författare)
The Open University, Milton Keynes, UK
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 (creator_code:org_t)
2016-09-27
2017
Engelska.
Ingår i: Space Science Reviews. - : Springer Science and Business Media LLC. - 0038-6308 .- 1572-9672. ; 208:1-4, s. 255-286
Relaterad länk:
https://doi.org/10.1...
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https://link.springe...
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • The thermal infrared imager TIR onboard Hayabusa2 has been developed to investigate thermo-physical properties of C-type, near-Earth asteroid 162173 Ryugu. TIR is one of the remote science instruments on Hayabusa2 designed to understand the nature of a volatile-rich solar system small body, but it also has significant mission objectives to provide information on surface physical properties and conditions for sampling site selection as well as the assessment of safe landing operations. TIR is based on a two-dimensional uncooled micro-bolometer array inherited from the Longwave Infrared Camera LIR on Akatsuki (Fukuhara et al., 2011). TIR takes images of thermal infrared emission in 8 to 12 μm with a field of view of 16×12∘16×12∘ and a spatial resolution of 0.05∘0.05∘ per pixel. TIR covers the temperature range from 150 to 460 K, including the well calibrated range from 230 to 420 K. Temperature accuracy is within 2 K or better for summed images, and the relative accuracy or noise equivalent temperature difference (NETD) at each of pixels is 0.4 K or lower for the well-calibrated temperature range. TIR takes a couple of images with shutter open and closed, the corresponding dark frame, and provides a true thermal image by dark frame subtraction. Data processing involves summation of multiple images, image processing including the StarPixel compression (Hihara et al., 2014), and transfer to the data recorder in the spacecraft digital electronics (DE). We report the scientific and mission objectives of TIR, the requirements and constraints for the instrument specifications, the designed instrumentation and the pre-flight and in-flight performances of TIR, as well as its observation plan during the Hayabusa2 mission.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Rymd- och flygteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Aerospace Engineering (hsv//eng)

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