Overview of the LAPYUTA mission (Life-environmentology, Astronomy, and PlanetarY Ultraviolet Telescope Assembly). 2024. 18-18
Ryoichi Koga, Shohei Negishi, Biao Zhao, Yuan Li, Fumiyuki Ito, Yasumasa Kasaba, Yasuhiro Hirahara. Mid-infrared imaging spectroscopic measurements of C2H4 frost simulating the outer solar system environments. Earth, Planets and Space. 2024
Fuminori Tsuchiya, Yasumasa Kasaba, Ichiro Yoshikawa, Go Murakami, Atsushi Yamazaki, Kazuo Yoshioka, Tomoki Kimura, Chihiro Tao, Ryoichi Koga, Hajime Kita, et al. Major results from the Hisaki mission and future perspectives. 2023
H. T. Smith, R. Koga, F. Tsuchiya, V. J. Dols. Insight Into Io Enabled by Characterization of Its Neutral Oxygen Torus. Journal of Geophysical Research: Space Physics. 2022. 127. 8
Hiroshi Maeshima, Kosei Matsumoto, Yasuhiro Hirahara, Takao Nakagawa, Ryoichi Koga, Yusuke Hanamura, Takehiko Wada, Koichi Nagase, Shinki Oyabu, Toyoaki Suzuki, et al. Infrared Absorption and Its Sources of CdZnTe at Cryogenic Temperature. Journal of Electronic Materials. 2022. 51. 2. 564-576
R. Koga, F. Tsuchiya, M. Kagitani, T. Sakanoi, M. Yoneda, I. Yoshikawa, K. Yoshioka, G. Murakami, A, Yamazaki, T. Kimura. Time variation of 130.4nm atomic oxygen emission near Io observed by Hisaki/EXCEED. Proceedings of Symposium on Planetary Science 2016. 2016. SPS2016_35
The spatial distribution of atomic oxygen emission at 130.4 nm around Io's orbit observed by Hisaki/EXCEED
(Magnetoshpheres of the Outer Planets 2017 2017)
Time and spatial variations of atomic oxygen emission around Io observed with Hisaki/EXCEED
(JpGU-AGU Joint Meeting 2017 2017)
Time variation of 130.4 nm atomic oxygen emission near Io observed by Hisaki/EXCEED
(AGU Fall meeting 2016 2016)