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Spatial Distribution of Radiation Belt Protons Deduced from Solar Cell Degradation of the Arase Satellite

International Journal of Astronomy and Astrophysics 2018年第4期8卷 306-322页

作者： Honoka Toda Wataru Miyake yoshizumi miyoshi Hiroyuki Toyota Yu Miyazawa Iku Shinohara Ayako Matsuoka Department of Aeronautics and Astronautics Tokai University Kanagawa Japan Institute for Space-Earth Environmental Research Nagoya University Nagoya Japan Institute of Space and Astronautical Science JAXA Kanagawa Japan

Analysis of solar-cell array panel (SAP) data from the Arase satellite orbiting in the inner magnetosphere showed a clear degradation of solar cells that could be attributed to trapped protons with energies greater than 6 MeV. Proton fluence was determined based on variations in the open-circuit voltage (Voc) of the solar cells, which we compared with that expected based on various distribution models (AP8MAX, AP9 mean and CRRESPRO quiet) of trapped protons. We found a general agreement, confirming the major contribution of trapped protons to the degradation, as well as a slight difference in the fluence expected based on the model calculations. To minimize this difference, we slightly modified the models, and found that concentrating the energetic protons on the magnetic equator provided a better agreement. Our results indicate that >6 MeV protons also has the equatorial concentration as reported for >18 MeV protons from the Van Allen Probes observation, and are interpreted as two components of the trapped protons, i.e., those of solar energetic particle (SEP) origin have an anisotropic pitch-angle distribution and are confined near the magnetic equator.

关键词： Arase Satellite Proton Radiation Belt Solar Cell Degradation

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Analysis software for upper atmospheric data developed by the IUGONET project and its application to polar science

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Advances in Polar Science 2013年第4期24卷 231-240页

作者： Yoshimasa Tanaka Atsuki Shinbori Tomoaki Hori Yukinobu Koyama Shuji Abe No-rio Umemura Yuka Sato Manabu Yagi Satoru UeNo Akiyo Yatagai Yasunobu Ogawa yoshizumi miyoshi National Institute of Polar Research 10-3 Midori-choTachikawaTokyo 190-8518Japan Research Institute for Sustainable Humanosphere GokashoUjiKyoto 611-0011Japan Solar-Terrestrial Environment Laboratory Nagoya UniversityFurou-choChikusaNagoyaAichi 464-8614Japan Data Analysis Center for Geomagnetism and Space Magnetism Graduate School of ScienceKyoto UniversityKi-tashirakawa-Oiwake ChoSakyo-kuKyoto 606-8502Japan International Center for Space Weather Science and Education Kyushu University6-10-1 HakozakiHigashi-kuFukuoka 812-8581Japan Planetary Plasma and Atmospheric Research Center Tohoku UniversityAramaki-aza-aobaAobaSendai 980-8578Japan Kwasan and Hida Observatories Graduate School of ScienceKyoto UniversityKurabashiraKamitakara-choTakayamaGifu 506-1314Japan

To comprehensively understand the Arctic and Antarctic upper atmosphere, it is often crucial to analyze various data that are obtained from many regions. Infrastructure that promotes such interdisciplinary studies on the upper atmosphere has been developed by a Japanese inter-university project called the Inter-university Upper atmosphere Global Observation Network （1UGONET）. The objective of this paper is to describe the infrastructure and tools developed by IUGONET. We focus on the data analysis software. It is written in Interactive Data Language （IDL） and is a plug-in for the THEMIS Data Analysis Software suite （TDAS）, which is a set of IDL libraries used to visualize and analyze satellite- and ground-based data. We present plots of upper atmospheric data provided by IUGONET as examples of applications, and verify the usefulness of the software in the study of polar science. We discuss IUGONET＇s new and unique developments, i.e., an executable file of TDAS that can run on the IDL Virtual Machine, IDL routines to retrieve metadata from the IUGONET database, and an archive of 3-D simulation data that uses the Common Data Format so that it can easily be used with TDAS.

关键词： data analysis software metadata database upper atmosphere ground-based observation polar science,interdisciplinary study IUGONET

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An integrated analysis platform merging SuperDARN data within the THEMIS tool developed by ERG-Science Center (ERG-SC)

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Advances in Polar Science 2013年第1期24卷 69-77页

作者： Tomoaki Hori Nozomu Nishitani yoshizumi miyoshi Yukinaga Miyashita Kanako Seki Tomonori Segawa Keisuke Hosokawa Akira S Yukimatu Yoshimasa Tanaka Natsuo Sato Manabu Kunitake Tsutomu Nagatsuma Solar-Terrestrial Environment Laboratory Nagoya University Furou-cho The University of Electro-Communications National Institute of Polar Research National Institute of Information and Communications Technology

The Energization and Radiation in Geospace （ERG） mission seeks to explore the dynamics of the radiation belts in the Earth＇s inner magnetosphere with a space-borne probe （ERG satellite） in coordination with related ground observations and simulations/modeling studies. For this mission, the Science Center of the ERG project （ERG-SC） will provide a useful data analysis platform based on the THEMIS Data Analysis software Suite （TDAS）, which has been widely used by researchers in many conjunction studies of the Time History of Events and Macroscale Interactions during Substorms （THEMIS） spacecraft and ground data. To import SuperDARN data to this highly useful platform, ERG-SC, in close collaboration with SuperDARN groups, developed the Common Data Format （CDF） design suitable for fitacf data and has prepared an open database of SuperDARN data archived in CDE ERG-SC has also been developing programs written in Interactive Data Language （IDL） to load fltacf CDF files and to generate various kinds of plots-not only range-time-intensity-type plots but also two-dimensional map plots that can be superposed with other data, such as all-sky images of THEMIS-GBO and orbital footprints of various satellites. The CDF-TDAS scheme developed by ERG-SC will make it easier for researchers who are not familiar with SuperDARN data to access and analyze SuperDARN data and thereby facilitate collaborative studies with satellite data, such as the inner magnetosphere data pro- vided by the ERG （Japan）-RBSP （USA）-THEMIS （USA） fleet.

关键词： ERG Science Center SuperDARN database data analysis software TItEMIS Common Data Format

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与大量粘土矿物相伴生的硫化物赋存状况——冲绳海槽弧后盆地海底热液活动区浅钻资料

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海洋地质 2013年第1期29卷 11-12页

作者： Jun-ichiro ISHIBASHI Youko miyoshi Rvoto yoshizumi

2011年6月，TAIGAll探险队使用浅钻系统实施火山碎屑沉积层热液系统海底环境调查。在Izena Cau1dron的Hakurei站位（27°15’N，127°04’E；深度：1661m），钻进深度达海底以下610cm。在海底以下223cm层中证实了硫化物／硫酸盐矿化的... 详细信息

2011年6月，TAIGAll探险队使用浅钻系统实施火山碎屑沉积层热液系统海底环境调查。在Izena Cau1dron的Hakurei站位（27°15’N，127°04’E；深度：1661m），钻进深度达海底以下610cm。在海底以下223cm层中证实了硫化物／硫酸盐矿化的存在。

关键词：硫化物热液活动区海底弧后盆地冲绳海槽赋存状况矿物相伴生

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