Takeshi Imamura - Papers

Planetary‐Scale Variations in Winds and UV Brightness at the Venusian Cloud Top: Periodicity and Temporal Evolution

Masataka Imai, Toru Kouyama, Yukihiro Takahashi, Atsushi Yamazaki, Shigeto Watanabe, Manabu Yamada, Takeshi Imamura, Takehiko Satoh, Masato Nakamura, Shin‐ya Murakami, Kazunori Ogohara, Takeshi Horinouchi

Journal of Geophysical Research: Planets 124 Oct 31, 2019 Peer-reviewed

Global Structure of Thermal Tides in the Upper Cloud Layer of Venus Revealed by LIR on Board Akatsuki

T. Kouyama, M. Taguchi, T. Fukuhara, T. Imamura, T. Horinouchi, T. M. Sato, S. Murakami, G. L. Hashimoto, Y. J. Lee, M. Futaguchi, T. Yamada, M. Akiba, T. Satoh, M. Nakamura

Geophysical Research Letters 46(16) 9457 - 9465 Aug 28, 2019 Peer-reviewed

Formation of the Y Feature at the Venusian Cloud Top by Planetary‐Scale Waves and the Mean Circulation: Analysis of Venus Express VMC Images

Y. Nara, T. Imamura, S. Murakami, T. Kouyama, K. Ogohara, M. Yamada, M. Takagi, H. Kashimura, N. Sato

Journal of Geophysical Research: Planets 124 May 2, 2019 Peer-reviewed

Constraints on Venus lightning from Akatsuki's first 3 years in orbit.

Lorenz, R. D, Imai, M, Takahashi, Y, Sato, M, Yamazaki, A, Sato, T. M

Geophysical Research Letters 46 7955 - 7961 2019 Peer-reviewed

New cloud morphologies discovered on the Venus's night during Akatsuki

J. Peralta, A. Sanchez-Lavega, T. Horinouchi, K. McGouldrick, I. Garate-Lopez, E.F. Young, M.A. Bullock, Y.J. Lee, T. Imamura, T. Satoh, S.S. Limaye

Icarus 333 177 - 182 2019 Peer-reviewed

Stationary features at the cloud top of Venus observed by Ultraviolet Imager onboard Akatsuki.

Kitahara, T, Imamura, T, Sato, T. M, Yamazaki, A, Lee, Y. J, Yamada, M

Journal of Geophysical Research 124 2019 Peer-reviewed

Principal components of short-term variability in the ultraviolet albedo of Venus.

P. Kopparla, Y. J. Lee, T. Imamura, A. Yamazaki

A&A 626 A30 2019 Peer-reviewed

Morphology and dynamics of Venus's middle clouds with Akatsuki/IR1. Geophys. Res Lett.

Peralta, J, N. Iwagami, A. Sanchez-Lavega, Y. J. Lee, R. Hueso, M. Narita, T. Imamura, P. Miles, A. Wesley, E. Kardasis, S. Takagi

46 2399 - 2407 2019 Peer-reviewed

Influence of the cloud-level neutral layer on the vertical propagation of topographically-generated gravity waves on Venus

T. Yamada, T. Imamura, T. Fukuhara, M. Taguchi

Earth Planets Space 71 123 2019 Peer-reviewed

Ultraviolet imager on Venus orbiter Akatsuki and its initial results

Atsushi Yamazaki, Manabu Yamada, Yeon Joo Lee, Shigeto Watanabe, Takeshi Horinouchi, Shin-ya Murakami, Toru Kouyama, Kazunori Ogohara, Takeshi Imamura, Takao M. Sato, Yukio Yamamoto, Tetsuya Fukuhara, Hiroki Ando, Ko-ichiro Sugiyama, Seiko Takagi, Hiroki Kashimura, Shoko Ohtsuki, Naru Hirata, George L. Hashimoto, Makoto Suzuki, Chikako Hirose, Munetaka Ueno, Takehiko Satoh, Takumi Abe, Nobuaki Ishii, Masato Nakamura

Earth, Planets and Space 70(1) 23 Dec 1, 2018 Peer-reviewed

Venus looks different from day to night across wavelengths: morphology from Akatsuki multispectral images

Sanjay S. Limaye, Shigeto Watanabe, Atsushi Yamazaki, Manabu Yamada, Takehiko Satoh, Takao M. Sato, Masato Nakamura, Makoto Taguchi, Tetsuya Fukuhara, Takeshi Imamura, Toru Kouyama, Yeon Joo Lee, Takeshi Horinouchi, Javier Peralta, Naomoto Iwagami, George L. Hashimoto, Seiko Takagi, Shoko Ohtsuki, Shin-ya Murakami, Yukio Yamamoto, Kazunori Ogohara, Hiroki Ando, Ko-ichiro Sugiyama, Nobuaki Ishii, Takumi Abe, Chikako Hirose, Makoto Suzuki, Naru Hirata, Eliot F. Young, Adriana C. Ocampo

Earth, Planets and Space 70(1) 24 Dec 1, 2018 Peer-reviewed

Initial products of Akatsuki 1-μm camera

Naomoto Iwagami, Takeshi Sakanoi, George L. Hashimoto, Kenta Sawai, Shoko Ohtsuki, Seiko Takagi, Kazunori Uemizu, Munetaka Ueno, Shingo Kameda, Shin ya Murakami, Masato Nakamura, Nobuaki Ishii, Takumi Abe, Takehiko Satoh, Takeshi Imamura, Chikako Hirose, Makoto Suzuki, Naru Hirata, Atsushi Yamazaki, Takao M. Sato, Manabu Yamada, Yukio Yamamoto, Tetsuya Fukuhara, Kazunori Ogohara, Hiroki Ando, Ko ichiro Sugiyama, Hiroki Kashimura, Toru Kouyama

Earth, Planets and Space 70(1) 6 Dec 1, 2018 Peer-reviewed

Mean winds at the cloud top of Venus obtained from two-wavelength UV imaging by Akatsuki

Takeshi Horinouchi, Toru Kouyama, Yeon Joo Lee, Shin-ya Murakami, Kazunori Ogohara, Masahiro Takagi, Takeshi Imamura, Kensuke Nakajima, Javier Peralta, Atsushi Yamazaki, Manabu Yamada, Shigeto Watanabe

Earth, Planets and Space 70(1) 10 Dec 1, 2018 Peer-reviewed

Local Time Dependence of the Thermal Structure in the Venusian Equatorial Upper Atmosphere: Comparison of Akatsuki Radio Occultation Measurements and GCM Results

Hiroki Ando, Masahiro Takagi, Tetsuya Fukuhara, Takeshi Imamura, Norihiko Sugimoto, Hideo Sagawa, Katsuyuki Noguchi, Silvia Tellmann, Martin Pätzold, Bernd Häusler, Yasuhiro Murata, Hiroshi Takeuchi, Atsushi Yamazaki, Tomoaki Toda, Atsushi Tomiki, Rajkumar Choudhary, Kishore Kumar, Geetha Ramkumar, Maria Antonita

Journal of Geophysical Research: Planets 123(9) 2270 - 2280 Sep, 2018 Peer-reviewed

Fine Vertical Structures at the Cloud Heights of Venus Revealed by Radio Holographic Analysis of Venus Express and Akatsuki Radio Occultation Data

Takeshi Imamura, Mayu Miyamoto, Hiroki Ando, Bernd Häusler, Martin Pätzold, Silvia Tellmann, Toshitaka Tsuda, Yuichi Aoyama, Yasuhiro Murata, Hiroshi Takeuchi, Atsushi Yamazaki, Tomoaki Toda, Atsushi Tomiki

Journal of Geophysical Research: Planets 123(8) 2151 - 2161 Aug, 2018 Peer-reviewed

Nightside winds at the lower clouds of Venus with Akatsuki/IR2: longitudinal, local time and decadal variations from comparison with previous measurements

Peralta, J, K. Muto, R. Hueso, T. Horinouchi, A. Sánchez-Lavega, S. Murakami, P. Machado, E.F. Young, Y.J. Lee, T. Kouyama, H. Sagawa, K. McGouldrick, T. Satoh, T. Imamura, S.S. Limaye, T.M. Sato, K. Ogohara, M. Nakamura, D. Luz

Astrophys. J. Supp. 239 29 2018 Peer-reviewed

Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction

Kazunori Ogohara, Masahiro Takagi, Shin-ya Murakami, Takeshi Horinouchi, Manabu Yamada, Toru Kouyama, George L. Hashimoto, Takeshi Imamura, Yukio Yamamoto, Hiroki Kashimura, Naru Hirata, Naoki Sato, Atsushi Yamazaki, Takehiko Satoh, Naomoto Iwagami, Makoto Taguchi, Shigeto Watanabe, Takao M. Sato, Shoko Ohtsuki, Tetsuya Fukuhara, Masahiko Futaguchi, Takeshi Sakanoi, Shingo Kameda, Ko-ichiro Sugiyama, Hiroki Ando, Yeon Joo Lee, Masato Nakamura, Makoto Suzuki, Chikako Hirose, Nobuaki Ishii, Takumi Abe

EARTH PLANETS AND SPACE 69 167 Dec, 2017 Peer-reviewed

The Atmospheric Dynamics of Venus

Agustin Sanchez-Lavega, Sebastien Lebonnois, Takeshi Imamura, Peter Read, David Luz

SPACE SCIENCE REVIEWS 212(3-4) 1541 - 1616 Nov, 2017 Peer-reviewed

Performance of Akatsuki/IR2 in Venus orbit: the first year

Takehiko Satoh, Takao M. Sato, Masato Nakamura, Yasumasa Kasaba, Munetaka Ueno, Makoto Suzuki, George L. Hashimoto, Takeshi Horinouchi, Takeshi Imamura, Atsushi Yamazaki, Takayuki Enomoto, Yuri Sakurai, Kosuke Takami, Kenta Sawai, Takashi Nakakushi, Takumi Abe, Nobuaki Ishii, Chikako Hirose, Naru Hirata, Manabu Yamada, Shin-ya Murakami, Yukio Yamamoto, Tetsuya Fukuhara, Kazunori Ogohara, Hiroki Ando, Ko-ichiro Sugiyama, Hiroki Kashimura, Shoko Ohtsuki

EARTH PLANETS AND SPACE 69 154 Nov, 2017 Peer-reviewed

Absolute calibration of brightness temperature of the Venus disk observed by the Longwave Infrared Camera onboard Akatsuki

Tetsuya Fukuhara, Makoto Taguchi, Takeshi Imamura, Akane Hayashitani, Takeru Yamada, Masahiko Futaguchi, Toru Kouyama, Takao M. Sato, Mao Takamura, Naomoto Iwagami, Masato Nakamura, Makoto Suzuki, Munetaka Ueno, George L. Hashimoto, Mitsuteru Sato, Seiko Takagi, Atsushi Yamazaki, Manabu Yamada, Shin-ya Murakami, Yukio Yamamoto, Kazunori Ogohara, Hiroki Ando, Ko-ichiro Sugiyama, Hiroki Kashimura, Shoko Ohtsuki, Nobuaki Ishii, Takumi Abe, Takehiko Satoh, Chikako Hirose, Naru Hirata

EARTH PLANETS AND SPACE 69 141 Oct, 2017 Peer-reviewed