Intercontinental comparison of optical atomic clocks through very long baseline interferometry
Pizzocaro, Marco, Sekido, Mamoru, Takefuji, Kazuhiro, Ujihara, Hideki, Hachisu, Hidekazu, Nemitz, Nils, Tsutsumi, Masanori, Kondo, Tetsuro, Kawai, Eiji, Ichikawa, Ryuichi, Namba, Kunitaka, Okamoto, Yoshihiro, Takahashi, Rumi, Komuro, Junichi, Clivati, Cecilia, Bregolin, Filippo, Barbieri, Piero, Mura, Alberto, Cantoni, Elena, Cerretto, Giancarlo, Levi, Filippo, Maccaferri, Giuseppe, Roma, Mauro, Bortolotti, Claudio, Negusini, Monia, Ricci, Roberto, Zacchiroli, Giampaolo, Roda, Juri, Leute, Julia, Petit, Gérard, Perini, Federico, Calonico, Davide, Ido, Tetsuya
Published in Nature physics (01.02.2021)
Published in Nature physics (01.02.2021)
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Journal Article
Are numerical weather model outputs helpful to reduce tropospheric delay signals in InSAR data?
Kinoshita, Youhei, Furuya, Masato, Hobiger, Thomas, Ichikawa, Ryuichi
Published in Journal of geodesy (01.03.2013)
Published in Journal of geodesy (01.03.2013)
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Journal Article
A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept
Sekido, Mamoru, Takefuji, Kazuhiro, Ujihara, Hideki, Kondo, Tetsuro, Tsutsumi, Masanori, Kawai, Eiji, Hachisu, Hidekazu, Nemitz, Nils, Pizzocaro, Marco, Clivati, Cecilia, Perini, Federico, Negusini, Monia, Maccaferri, Giuseppe, Ricci, Roberto, Roma, Mauro, Bortolotti, Claudio, Namba, Kunitaka, Komuro, Jun’ichi, Ichikawa, Ryuichi, Suzuyama, Tomonari, Watabe, Ken-ichi, Leute, Julia, Petit, Gérard, Calonico, Davide, Ido, Tetsuya
Published in Journal of geodesy (01.04.2021)
Published in Journal of geodesy (01.04.2021)
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Journal Article
Comparison of Ray-Tracing Packages for Troposphere Delays
Nafisi, V., Urquhart, L., Santos, M. C., Nievinski, F. G., Bohm, J., Wijaya, D. D., Schuh, H., Ardalan, A. A., Hobiger, T., Ichikawa, R., Zus, F., Wickert, J., Gegout, P.
Published in IEEE transactions on geoscience and remote sensing (01.02.2012)
Published in IEEE transactions on geoscience and remote sensing (01.02.2012)
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Journal Article
Ray-traced troposphere slant delays for precise point positioning
Hobiger, Thomas, Ichikawa, Ryuichi, Takasu, Tomoji, Koyama, Yasuhiro, Kondo, Tetsuro
Published in Earth, planets, and space (01.01.2008)
Published in Earth, planets, and space (01.01.2008)
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Journal Article
Improving GPS positioning estimates during extreme weather situations by the help of fine-mesh numerical weather models
Hobiger, Thomas, Shimada, Seiichi, Shimizu, Shingo, Ichikawa, Ryuichi, Koyama, Yasuhiro, Kondo, Tetsuro
Published in Journal of atmospheric and solar-terrestrial physics (01.02.2010)
Published in Journal of atmospheric and solar-terrestrial physics (01.02.2010)
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Journal Article
The effect of neglecting VLBI reference station clock offsets on UT1 estimates
Hobiger, Thomas, Koyama, Yasuhiro, Boehm, Johannes, Kondo, Tetsuro, Ichikawa, Ryuichi
Published in Advances in space research (16.03.2009)
Published in Advances in space research (16.03.2009)
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Journal Article
Tsukuba GPS Dense Net Campaign Observation: Improvement in GPS Analysis of Slant Path Delay by Stacking One-way Postfit Phase Residuals
SHOJI, Yoshinori, NAKAMURA, Hajime, IWABUCHI, Tetsuya, AONASHI, Kazumasa, SEKO, Hiromu, MISHIMA, Kenji, ITAGAKI, Akihiko, ICHIKAWA, Ryuichi, OHTANI, Ryu
Published in Journal of the Meteorological Society of Japan (2004)
Published in Journal of the Meteorological Society of Japan (2004)
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Journal Article
Geodetic measurements and quantitative evaluation for reduced gravitational redshift uncertainty of NICT optical frequency standards
Ryuichi, Ichikawa, Hidekazu, Hachisu, Mamoru, Sekido, Tetsuya, Ido, Yoshifumi, Hiraoka, Eiichirou, Harima, Shuntaro, Fukaya, Koji, Matsuo, Masahiro, Nakashima, Yuichi, Aoyama, Akihisa, Hattori, Yoichi, Fukuda
Published in 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) (19.08.2023)
Published in 2023 XXXVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS) (19.08.2023)
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Conference Proceeding
Evaluation of repeatability of baseline lengths in the VLBI network around the Tokyo metropolitan area
Kondo, Tetsuro, Kurihara, Noriyuki, Koyama, Yasuhiro, Sekido, Mamoru, Ichikawa, Ryuichi, Yoshino, Taizoh, Amagai, Jun, Sebata, Kohichi, Furuya, Masato, Takahashi, Yukio, Kiuchi, Hitoshi, Kaneko, Akihiro
Published in Geophysical research letters (01.04.1998)
Published in Geophysical research letters (01.04.1998)
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Journal Article
Multi-technique comparison of troposphere zenith delays and gradients during CONT08
Teke, Kamil, Böhm, Johannes, Nilsson, Tobias, Schuh, Harald, Steigenberger, Peter, Dach, Rolf, Heinkelmann, Robert, Willis, Pascal, Haas, Rüdiger, García-Espada, Susana, Hobiger, Thomas, Ichikawa, Ryuichi, Shimizu, Shingo
Published in Journal of geodesy (01.07.2011)
Published in Journal of geodesy (01.07.2011)
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Journal Article
A Comparison of Broadcast and Final Orbits on GPS Delays in GPS-VLBI Hybrid Observation
Kwak, Younghee, Cho, Jungho, Kondo, Tetsuro, Takiguchi, Hiroshi, Amagai, Jun, Gotoh, Tadahiro, Sekido, Mamoru, Ichikawa, Ryuichi, Kim, Tuhwan, Sasao, Tetsuo
Published in Journal of Positioning, Navigation, and Timing (31.10.2012)
Published in Journal of Positioning, Navigation, and Timing (31.10.2012)
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Journal Article
Computation of Troposphere Slant Delays on a GPU
Hobiger, T., Ichikawa, R., Koyama, Y., Kondo, T.
Published in IEEE transactions on geoscience and remote sensing (01.10.2009)
Published in IEEE transactions on geoscience and remote sensing (01.10.2009)
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Journal Article
Precise frequency transfer experiments using VLBI and other techniques
Ichikawa, Ryuichi, Takiguchi, Hiroshi, Kimura, Moritaka, Ishii, Atsutoshi, Hobiger, Thomas, Koyama, Yasuhiro, Kondo, Tetsuro, Takahashi, Yasuhiro, Tsuchiya, Shigeru, Nakagawa, Fumimaru, Nakamura, Maho, Tabuchi, Ryo, Hama, Shinichi, Gotoh, Tadahiro, Fujieda, Miho, Aida, Masanori, Li Tingyu, Amagai, Jun
Published in 2011 XXXth URSI General Assembly and Scientific Symposium (01.08.2011)
Published in 2011 XXXth URSI General Assembly and Scientific Symposium (01.08.2011)
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Conference Proceeding
Improving GPS positioning estimates during extreme weather situations by the help of fine-mesh numerical weather models: The equatorial and low latitude ionosphere/thermospere in quiet and disturbed times: New techniques and coordinated observations
HOBIGER, Thomas, SHIMADA, Seiichi, SHIMIZU, Shingo, ICHIKAWA, Ryuichi, KOYAMA, Yasuhiro, KONDO, Tetsuro
Published in Journal of atmospheric and solar-terrestrial physics (2010)
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Published in Journal of atmospheric and solar-terrestrial physics (2010)
Journal Article
Ray-traced troposphere slant delays for precise point positioning
Hobiger, Thomas, Ichikawa, Ryuichi, Takasu, Tomoji, Koyama, Yasuhiro, Kondo, Tetsuro
Published in Earth, planets, and space (01.01.2008)
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Published in Earth, planets, and space (01.01.2008)
Journal Article
VLBI Measurements for Frequency Transfer
Takiguchi, Hiroshi, Koyama, Yasuhiro, Ichikawa, Ryuichi, Gotoh, Tadahiro, Ishii, Atsutoshi, Hobiger, Thomas, Hosokawa, Mizuhiko
Published in Proceedings of the International Astronomical Union (01.11.2009)
Published in Proceedings of the International Astronomical Union (01.11.2009)
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Journal Article