Last Updated : April 2, 2024

Space Geodesy Research

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FY2023

  • Coastline change caused by the 2024 Noto Peninsula Earthquake detected by ALOS-2 SAR satellite image (Jan., 2024) [→LINK] NEW!!
  • The Joint PI Meeting of JAXA Earth Observation Missions FY2023（Nov.2023）
    • Nationwide land deformation monitoring: application of InSAR time series analysis to Japan
  • The 2023 Seismological Society of Japan Fall Meeting(Oct. 2023)
    • Detailed fault ruptures for the 2023 Turkey-Syria earthquake revealed by SAR-based crustal deformation analysis
  • 140th Meeting of the Geodetic Society of Japan(Oct. 2023)
  • 28th International Union of Geodesy and Geophysics General Assembly（IUGG2023）（July 2023）
    • Nationwide land deformation monitoring: application of InSAR time series analysis to Japan[Abstract (PDF)]
    • Gravimetric geoid determination of Japan using nationwide airborne gravity data[Abstract (PDF)]
  • Japan Geoscience Union Meeting 2023 (JpGU 2023) (May 2023)
    • Detailed fault ruptures for the 2023 Turkey earthquake revealed by SAR-based crustal deformation analysis [Abstract (PDF)]
    • The consistency between the GEONET routine solution and the multi-GNSS PPP solution[Abstract (PDF)]
    • Investigation of interpolation method for estimation of Surface Deformation model[Abstract (PDF)]
    • A precise gravimetric geoid model for Japan that incorporates the airborne gravity data over the four main islands[Abstract (PDF)]

FY2022

  • The Second Asia Pacific geoid workshop for IAG-SC2.4e (Oct. 2022)
    • Current status of a gravimetric geoid model for Japan[Abstract (PDF)]
  • The Thirteenth Joint Meeting of the U.S.-Japan Panel on Earthquake Research (UJNR) (Sep. 2022)
    • Research on relationship between fault rupture propagation and crustal structure of volcano area: case study of the 2016 Kumamoto Earthquake[Abstract (PDF)]
  • Japan Geoscience Union Meeting 2022 (JpGU 2022) (May-June 2022)
    • An attempt to improve coastal geoid determination by introducing airborne gravity data and a marine residual terrain model [Abstract (PDF)]
    • Impact of introducing LEO satellite tracking data on SLR-based gravity field determination [Abstract (PDF)]
    • Investigation of Crustal Deformation model using daily coordinates of GNSS CORS [Abstract (PDF)]
    • Achievements of ground deformation monitoring using ALOS satellite series at GSI and the way forward [Abstract (PDF)]
    • Spatial relation between fault motions and density structures at the terminus of fault rupture for the 2016 Kumamoto earthquake [Abstract (PDF)]

FY2021

  • American Geophysical Union fall meeting 2021 (AGU 2021) (Dec. 2021)
    • What controlled the fault ruptures in the final stage?: A comparison of SAR-derived fault slips with gravity-inferred density structures for the 2016 Kumamoto earthquake in Japan [Abstract (PDF)]
    • Effect of lateral topographic density variations on subsurface structure estimation by gravity inversion – a case study in Aso Caldera, Japan [Abstract (PDF)]
  • Scientific Assembly of the International Association of Geodesy (IAG 2021) (June-Jul. 2021)
    • Examining the optimal depth of the condensed topographic masses for precise geoid determination based on the Stokes-Helmert scheme – A case study in Colorado [Abstract (PDF)]
  • Japan Geoscience Union Meeting 2021 (JpGU 2021) (May-June 2021)
    • Development of coordinate calculation strategy for GEONET station using multi GNSS PPP aiming future management scheme of the national coordinate [Abstract (PDF)]
    • Evaluation Performance of QZSS Centimeter Level Augmentation Service (CLAS) with long-term field observations [Abstract (PDF)]
    • Discussion of the colour map for SAR interferograms [Abstract (PDF)]
    • Accuracy evaluation of airborne gravity data by three-dimensional least-squares collocation method [Abstract (PDF)]

Techniques

Researchers (FY2024)

  • KOBAYASHI, Tomokazu : Director of Division
  • NAKAGAWA, Hiroyuki : Chief Researcher
  • MATSUO, Koji : Chief Researcher
  • HATTORI, Akihisa : Researcher

Research Projects

  • Research on development of advanced space geodetic techniques for realizing the disaster resilient National Geodetic Reference Frame (2020-2024)

Recent Papers


FY2023

  • Matsumoto, S., McCallum, L., McCallum, J., Jaradat, A., Ishigak, M., yoshifuji, H., Kobayashi, T. (2023): The Australia-Japan VGOS observation, Proceedings of the 26th European VLBI Group for Geodesy and Astrometry Working Meeting, edited by Rudiger Haas, Eva Schroth, Alexander Neidhardt, 121–124. https://doi.orj/10.14459/2023md1730292
  • Kobayashi T., Munekane, H., Kuwahara, M., Furui, H. (2023): Insights on the 2023 Kahramanmaraş Earthquake, Turkey, from InSAR: fault locations, rupture styles and induced deformation, Geophysical Journal International, 236, (2), 1068–1088. https://doi.org/10.1093/gji/ggad464
  • Matsumoto, S., Nakakuki, T., Yutsudo, T., Ueshiba, H., Takagi, Y., Hayashi, K., Mori, K., Sato, Y., Kobayashi, T. (2023): Status of the Ishioka VLBI Station for the Past Two Years, International VLBI Service for Geodesy and Astrometry 2022 General Meeting Proceedings, NASA/CP-20220018789, pp56-58. [→LINK]

FY2022

  • Matsumoto, S., Ueshiba, H., Nakakuki, T., Takagi, Y., Hayashi, K., Yutsudo, T., Mori, K., Sato, Y., Kobayashi, T. (2022): An effective approach for accurate estimation of VLBI–GNSS local-tie vectors, Earth, Planets and Space, 74, 147. https://doi.org/10.1186/s40623-022-01703-5
  • Morishita, Y. (2022): Effective unwrapping of complicated phases by exploiting multiple interferograms: a case study of the 2016 Kumamoto earthquake, Earth Planets Space, 74, 33. https://doi.org/10.1186/s40623-022-01595-5
  • Morishita, Y., Kobayashi, T. (2022): Three-dimensional deformation and its uncertainty derived by integrating multiple SAR data analysis methods, Earth Planets Space, 74, 16. https://doi.org/10.1186/s40623-022-01571-z

FY2021

  • Wang, YM., Sánchez, L., Ågren, J., Huang, J., Forsberg, R., ..., Matsuo, K., et al. (2021): Colorado geoid computation experiment: overview and summary, Journal of Geodesy, 95, 127. https://doi.org/10.1007/s00190-021-01567-9
  • Morishita, Y. (2021): Nationwide urban ground deformation monitoring in Japan using Sentinel-1 LiCSAR products and LiCSBAS, Prog. Earth Planet. Sci., 8, 6. https://doi.org/10.1186/s40645-020-00402-7

FY2020

  • Takamoto, M., Ushijima, I., Ohmae, N., Yahagi, T., Kokado, K., Shinkai, H., Katori, H. (2020): Test of general relativity by a pair of transportable optical lattice clocks, Nat. Photonics, 14, 411–415. https://doi.org/10.1038/s41566-020-0619-8
  • Matsuo, K., Kuroishi, Y. (2020): Refinement of a gravimetric geoid model for Japan using GOCE and an updated regional gravity field model, Earth, Planets and Space, 72, 33. https://doi.org/10.1186/s40623-020-01158-6
  • Morishita, Y., Lazecky, M., Wright, T.J., Weiss, J.R., Elliott, J.R., Hooper, A. (2020): LiCSBAS: An Open-Source InSAR Time Series Analysis Package Integrated with the LiCSAR Automated Sentinel-1 InSAR Processor, Remote Sens., 12, 424. https://doi.org/10.3390/rs12030424

FY2019

  • Morishita, Y. (2019): A Systematic Study of Synthetic Aperture Radar Interferograms Produced From ALOS-2 Data for Large Global Earthquakes From 2014 to 2016, IEEE J. Sel. Top. Appl. Earth Obs. Remote Sens., vol. 12, no. 7, pp. 2397-2408. https://doi.org/10.1109/JSTARS.2019.2921664

FY2018

FY2017

  • Kawamoto, S., Y. Ohta, Y. Hiyama, M. Todoriki, T. Nishimura, T. Furuya, Y. Sato, T. Yahagi, K. Miyagawa (2017): REGARD: A new GNSS-based real-time finite fault modeling system for GEONET, J. Geophys. Res. https://doi.org/10.1002/2016JB013485

FY2016

FY2015

  • Kawamoto, S., Miyagawa, K., Yahagi, T., Todoriki, M., Nishimura, T., Ohta, Y., Hino, R., Miura, S. (2015): Development and Assessment of Real-Time Fault Model Estimation Routines in the GEONET Real-Time Processing System, International Association of Geodesy Symposia 2015, Springer.https://doi.org/10.1007/1345_2015_49

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