「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.

https://doi.org/10.1016/j.actaastro.2020.04.042

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