先月出版された「はやぶさ２」に関する論文（筆頭著者：国立天文台・山本さん）の紹介記事が出ています．http://www.hayabusa2.jaxa.jp/topics/20200708_eps/
「Research」カテゴリーアーカイブ
JpGU-AGU Virtual Meeting 2020
This year’s JpGU meeting was converted to online, and today (12 July 2020) was the opening day. http://www.jpgu.org/meeting_j2020v/
Otsubo has a first-author “iPoster” titled “GGOS Japan’s roles and activities as a GGOS Affiliate” and a few more as a coauthor.
例年（今年も）学部学生は無料で参加できますので，興味のある皆さんはぜひ．
Hayabusa2 Orbit Determination study published
A paper led by Keiko Yamamoto of National Astronomical Observatory is published on Earth, Planets and Space. The orbits of Hayabusa2 spacecraft and the GM of Ryugu are investigated. Otsubo is involved in the key part of orbit analysis.
K. Yamamoto, T. Otsubo, et al., Dynamic precise orbit determination of Hayabusa2 using laser altimeter (LIDAR) and image tracking data sets, Earth, Planets and Space, 72:85, https://doi.org/10.1186/s40623-020-01213-2, 2020.
VLBI Orbit Determination Simulation study published
A paper written by Grzegorz Klopotek of Chalmers University of Technology, Sweden, in collaboration with Otsubo, is published on Journal of Geodesy. This is a challenging research seeking a possibility of VLBI technique for precise orbit determination of Earth orbiting satellites.
G. Klopotek, T. Hobiger, R. Haas, T. Otsubo, Geodetic VLBI for precise orbit determination of Earth satellites: a simulation study, Journal of Geodesy, 94:56, https://doi.org/10.1007/s00190-020-01381-9, 2020.
New Satellite Photometry Study Published
The paper describing how to optically detect small irregularity on the surface of a satellite is now published in Acta Astronautica. Available online 23 April 2020.
D. Kucharski, G. Kirchner, T. Otsubo, S. K. Flegel, H. Kunimori, M. K. Jah, F. Koidl, J. C. Bennett, M. Steindorfer, P. Wang, Quanta Photogrammetry of Experimental Geodetic Satellite for remote detection of micrometeoroid and orbital debris impacts, 174, 24-31, Acta Astronautica, 2020.
ILRS updates “Global Report Cards”
International Laser Ranging Service (ILRS; website) updates its system for the monthly reports evaluating performance of every ILRS station. See
https://ilrs.cddis.eosdis.nasa.gov/network/system_performance/global_report_cards/monthly/index.html
where Hitotsubashi Orbital Analysis (based on our QC analysis) is being used in Table 2.
Special Issue: Satellite Laser Ranging, Journal of Geodesy
Long-awaited Special Issue on Satellite Laser Ranging is now completed and published on Journal of Geodesy. It is a good collection of 20 articles in total. Otsubo served as one of the guest editors and Otsubo’s first-author paper (accepted last year) is included.
New SLR CoM study published
A UK-Japan joint paper is now published. This study tackled one of the largest unsolved issues in geodesy: TRF Scale. Thank you José, great achievement.
Authors: José Rodríguez, Graham Appleby and Toshimichi Otsubo
Title: Upgraded modelling for the determination of centre of mass corrections of geodetic SLR satellites: impact on key parameters of the terrestrial reference frame
Journal of Geodesy (available online on 16 Nov 2019)
https://link.springer.com/article/10.1007%2Fs00190-019-01315-0
IAG Executive Committee 2019-2023
2019年7月より4年間の任期で，大坪は IAG （国際測地学協会）の Executive Committee を務めることになりました．一橋大学で撮った写真が，こちらのメンバー一覧 https://www.iag-aig.org/iag-executive-committee に載っています（一番下）．ヨーロッパ勢が強い業界であることが感じ取れるかと．
GGOS Japan ウェブページ開設
国土地理院 栗原さんのご尽力により，GGOS Japan（2019年5月に GGOS ワーキンググループより改称）のウェブサイトが開設されました．GGOS Affiliate として，GGOS 本体のサイト ggos.org の下に設置させていただいています．ウィーンの GGOS 事務局の方々にもお世話になりました．
昨年大量に印刷したリーフレットを少しだけ更新した 2019.06 版も置かれています．