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

Okada, Tatsuaki and Fukuhara, Tetsuya and Tanaka, Satoshi and Taguchi, Makoto and Imamura, Takeshi and Arai, Takehiko and Senshu, Hiroki and Ogawa, Yoshiko and Demura, Hirohide and Kitazato, Kohei and Nakamura, Ryosuke and Kouyama, Toru and Sekiguchi, Tomohiko and Hasegawa, Sunao and Matsunaga, Tsuneo and Wada, Takehiko and Takita, Jun and Sakatani, Naoya and Horikawa, Yamato and Endo, Ken and Helbert, Jörn and Müller, Thomas G. and Hagermann, Axel (2017) Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2. Space Science Reviews, 208 (1-4), pp. 255-286. Springer. DOI: 10.1007/s11214-016-0286-8 ISSN 0038-6308

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Official URL: http://dx.doi.org/10.1007/s11214-016-0286-8

Abstract

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∘ and a spatial resolution of 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.

Item URL in elib:https://elib.dlr.de/116130/
Document Type:Article
Title:Thermal Infrared Imaging Experiments of C-Type Asteroid 162173 Ryugu on Hayabusa2
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Okada, Tatsuakiinstitute of space and astronautical science, japan aerospace exploration agency, sagamihara, japan; graduate school of science, the university of tokyo, bunkyo tokyo, japanUNSPECIFIED
Fukuhara, Tetsuyarikkyo university, tokyo, japanUNSPECIFIED
Tanaka, Satoshiinstitute of space and astronautical science, japan aerospace exploration agency, sagamihara, japanUNSPECIFIED
Taguchi, Makotorikkyo university, tokyo, japanUNSPECIFIED
Imamura, Takeshigraduate school of frontiers sciences, the university of tokyo kashiwa, japanUNSPECIFIED
Arai, Takehikoinstitute of space and astronautical science, japan aerospace exploration agency, sagamihara, japanUNSPECIFIED
Senshu, Hirokiplanetary exploration research center, chiba institute of technology, narashino, japanUNSPECIFIED
Ogawa, Yoshikocenter for advanced information science and technology, university of aizu, aizu-wakamatsu, japanUNSPECIFIED
Demura, Hirohidecenter for advanced information science and technology, university of aizu, aizu-wakamatsu, japanUNSPECIFIED
Kitazato, Koheicenter for advanced information science and technology, university of aizu, aizu-wakamatsu, japanUNSPECIFIED
Nakamura, Ryosukenational institute for advanced industrial science and technology, tokyo, japanUNSPECIFIED
Kouyama, Torunational institute for advanced industrial science and technology, tokyo, japanUNSPECIFIED
Sekiguchi, Tomohikohokkaido university of education, asahikawa, japanUNSPECIFIED
Hasegawa, Sunaoinstitute of space and astronautical science, japan aerospace exploration agency, sagamihara, japanUNSPECIFIED
Matsunaga, Tsuneocenter for global environmental research, national institute for environmental studies, tsukuba, japanUNSPECIFIED
Wada, Takehikoinstitute of space and astronautical science, japan aerospace exploration agency, sagamihara, japanUNSPECIFIED
Takita, Jungraduate school of science, the university of tokyo, bunkyo tokyo, japanUNSPECIFIED
Sakatani, Naoyainstitute of space and astronautical science, japan aerospace exploration agency, sagamihara, japanUNSPECIFIED
Horikawa, Yamatodepartment of space and astronautical science, school of physical sciences, graduate university for advanced studies, sagamihara, japanUNSPECIFIED
Endo, Kencenter for advanced information science and technology, university of aizu, aizu-wakamatsu, japanUNSPECIFIED
Helbert, Jörnjoern.helbert (at) dlr.deUNSPECIFIED
Müller, Thomas G.max-planck institute for extraterrestrial physics, garching, germanyUNSPECIFIED
Hagermann, Axelcentre for earth, planetary, space and astronomical research (cepsar), open university, milton keynes, ukUNSPECIFIED
Date:July 2017
Journal or Publication Title:Space Science Reviews
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:208
DOI :10.1007/s11214-016-0286-8
Page Range:pp. 255-286
Publisher:Springer
ISSN:0038-6308
Status:Published
Keywords:Thermography Thermal inertia Temperature Near-Earth asteroid Planetary exploration
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):Project MASCOT (Instruments)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Leitungsbereich PF
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:30 Nov 2017 14:01
Last Modified:08 Jan 2018 09:54

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