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Hayabusa2’s superior solar conjunction mission operations: Planning and post-operation results

Astrodynamics 2020年第4期4卷 265-288页

作者： Stefania Soldini Hiroshi Takeuchi sho taniguchi shota Kikuchi Yuto Takei Go Ono Masaya Nakano Takafumi Ohnishi Takanao Saiki Yuichi Tsuda Fuyuto Terui Naoko OgawaYuya MimasuTadateru Takahashi Atsushi Fujii Satoru NakazawaKent Yoshikawa Yusuke Oki Chikako Hirose Hirotaka Sawada Tomohiro Yamaguchi Makoto Yoshikawa Department of Mechanical Materials and Aerospace EngineeringUniversity of LiverpoolLiverpool L693BXUK Institute of Space and Astronautical Science Japan Aerospace Exploration AgencySagamihara 252-5210Japan Fujitsu Limited Tokyo 105-7123Japan Mitsubishi Electric Corporation Tokyo 100-8310Japan

In late 2018,the asteroid Ryugu was in the Sun's shadow during the superior solar conjunction *** the Sun-Earth-Ryugu angle decreased to below 3°,the Hayabusa2 spacecraft experienced 21 days of planned blackout in the Earth-probe communication *** was the first time a spacecraft had experienced solar conjunction while hovering around a minor *** the safety of the spacecraft,a low energy transfer trajectory named Ayu was designed in the Hill reference frame to increase its altitude from 20 to 110 *** trajectory was planned with the newly developed optNEAR tool and validated with real time *** article shows the results of the conjunction operation,from planning to fight data.

关键词： superior solar conjunction Hayabusa2 Ryugu hovering satellite mission operations

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Development of a digital zenith telescope for advanced astrometry

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Science China(Physics,Mechanics & Astronomy) 2012年第4期55卷 723-732页

作者： HANADA Hideo ARAKI Hiroshi TAZAWA Seiichi TSURUTA Seiitsu NODA Hirotomo ASARI Kazuyoshi SASAKI sho FUNAZAKI Ken'ichi SATOH Atsushi taniguchi Hideo KIKUCHI Mamoru TAKAHASHI Tomoe YAMAZAKI Atsumu PING JinSong KAWANO Nobuyuki PETROVA Natalia GOUDA Naoteru YANO Taihei YAMADA Yoshiyuki NIWA Yoshito KONO Yusuke IWATA Takahiro National Astronomical Observatory of Japan Iwate-ken 0230861Japan Department of Engineering Department Iwate UniversityIwate 0208550Japan National Astronomical Observatory Chinese Academy of SciencesBeijing 100012China Oshu Space&Astronomy Museum Iwate-ken 0230861Japan Department of Astronomy Kazan State UniversityKazan 420008Russia Section of Graduate School of Science Division of Physics and Astronomy Kyoto UniversityKyoto 6068501Japan Japan Aerospace Exploration Agency Kanagawa 2525210Japan

Like other optical astrometric techniques,the Photographic Zenith Tube(PZT) has played a key role in the past observations of the Earth rotation,and it also has a potential to be applied to several other observations by taking advantage of automatic observations with self compensation of tilt of the *** here propose In-situ Lunar Orientation Measurement(ILOM) to study lunar rotational dynamics by direct observations of the lunar rotation from the lunar surface by using a small telescope like PZT with an accuracy of 1 milli-seconds of arc(1 mas) in the post-SELENE *** second application is to obtain local gravity field on the Earth by combining deflection of the vertical measured by PZT and the position measured by Global Positioning System(GPS) or Global Navigation Satellite System(GNSS).The accuracy required for this purpose is not as strict as *** have already developed a Bread Board Model(BBM) of the telescope for ILOM and made some experiments in order to know the performance of the driving mechanism under a similar condition to the lunar environment showing high vacuum,large temperature change and dusty *** have also shown that it is possible to correct the effects of uniform temperature change upon the optical system by using a simple model with an accuracy of better than 1 *** model has the potential to attain the accuracy of 1 mas,based on the results of the experiments and the simulations.

关键词：天体测量望远镜天顶全球导航卫星系统自动观测模型精度地球自转 SELENE

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Dectin-2 selectively suppresses liver metastasis by facilitating the uptake of cancer cells by Kupffer cells

Dectin-2 selectively suppresses liver metastasis by facilita...

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第十一届全国免疫学学术大会

作者： Yoshitaka Kimura Hideyuki Yanai sho Hangai Asuka Inoue Junko Nishio Hideo Negishi Shinobu Saijo Yoichiro Iwakura sho Yamasaki Tadatsugu taniguchi Institute of Industrial Science The University of Tokyo Max Planck-The University of Tokyo Center for Integrative Inflammology Department of Molecular Immunology Medical Mycology Research Center Chiba University Center for Animal Disease Models Research Institute for Biomedical Sciences Tokyo University of Science Division of Molecular Immunology Medical Institute of Bioregulation Kyushu University

Metastasis to distal organ is a fatal cause of cancer death and liver is one of the most common site of metastasis leading to bad *** it has been known that innate immune cells play critical roles in the regulation of liver metastasis,how they control the tumor development is still largely *** using in vivo cancer models,we found that Dectin-2,a C-type lectin receptor(CLR),suppressed liver metastasis although dispensable for the

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Recognition of tumor cells by Dectin-1 orchestrates innate immune cells for anti-tumor responses

Recognition of tumor cells by Dectin-1 orchestrates innate i...

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第九届全国免疫学学术大会

作者： Yoshitaka Kimura Shiho Chiba Hiroaki Ikushima Hiroshi Ueki Hideyuki Yanai sho Hangai Junko Nishio Hideo Negishi Tomohiko Tamura Shinobu Saijo Yoichiro Iwakura Tadatsugu taniguchi Department of Molecular Immunology and Center for International Research on Integrative Biomedical Systems Institute of Industrial ScienceThe University of Tokyo Max Planck-The University of Tokyo Center for Integrative Inflammology Core Research for Evolution Science and Technology Japan Science and Technology Agency Department of Immunology Yokohama City University Graduate School of Medicine Department of Molecular Immunology Medical Mycology Research CenterChiba University Center for Animal Disease Models Research Institute for Biomedical SciencesTokyo University of Science

Innate immune receptors play pivotal roles in the immune response against invading ***,the role of such receptors in anti-tumor immune responses is still *** gain insights into the role of innate immune

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