A study on temporal variation of the Venus atmosphere using a circumpolar stratospheric telescope FUJIN

• Project/Area Number: 15H03734
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Space and upper atmospheric physics
• Research Institution: Rikkyo University
• Principal Investigator: TAGUCHI Makoto 立教大学, 理学部, 教授 (70236404)
• Co-Investigator(Kenkyū-buntansha): 吉田 和哉 東北大学, 工学研究科, 教授 (00191578) ; 渡邉 誠 岡山理科大学, 理学部, 准教授 (10450181) ; 高橋 幸弘 北海道大学, 理学研究院, 教授 (50236329) ; 坂本 祐二 東北大学, 工学研究科, 特任准教授 (50431523) ; 中野 壽彦 大分工業高等専門学校, 機械工学科, 助教 (50748986) ; 莊司 泰弘 大阪大学, 工学研究科, 助教 (70582774)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000); Fiscal Year 2015: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
• Keywords: 気球実験 / 惑星 / リモートセンシング / 大気力学 / 大気化学 / 大気球実験 / スペーステレスコープ / 大気ダイナミクス / あかつき / 極周回 / 光学リモートセンシング

Outline of Final Research Achievements

The circumpolar stratospheric telescope FUJIN-2 has been developed for observations of planetary atmospheres and plasmas. The dynamics, chemistry and identification of an UV abosorber of the Vinus atmosphere are selected as the first scientific target. Development of the hardware of FUJIN-2 has been promoted based on the experimental data obtained by FUJIN-1. Development of the optics, electrical and attitude control systems has been completed. A balloon experiment at ESRANGE in Kiruna, Sweden has been proposed. As an important scientific result about the Venus atmosphere large stationary thermal structures have been discovered by the Longwave Infrared Camera onboard the Venus orbiter Akatsuki. From detaied analysis of the observed data it is suggested that atmospheric gravity waves generated in the lower atmosphere by the solar radiation energy propagate to the cloud-top altitudes forming the structures.

Research Products

• [Journal Article] Venus looks different from day to night across wavelengths: morphology from Akatsuki multispectral images (2018)
  • Author(s): Sanjay S. Limaye, Shigeto Watanabe, Atsushi Yamazaki, Manabu Yamada, Takehiko Satoh, 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 et al.
  • Journal Title: Earth, Planets and Space Volume: 70 Issue: 1 Pages: 1-38
  • DOI: 10.1186/s40623-018-0789-5
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Topographical and Local Time Dependence of Large Stationary Gravity Waves Observed at the Cloud Top of Venus (2017)
  • Author(s): Kouyama T.、Imamura T.、Taguchi M.、Fukuhara T.、Sato T. M.、Yamazaki A.、Futaguchi M.、Murakami S.、Hashimoto G. L.、Ueno M.、Iwagami N.、Takagi S.、Takagi M.、Ogohara K.、Kashimura H.、Horinouchi T.、Sato N.、Yamada M.、Yamamoto Y.、Ohtsuki S.、Sugiyama K.、Ando H.、Takamura M.、Yamada T.、Satoh T.、Nakamura M.
  • Journal Title: Geophysical Research Letters Volume: 44 Issue: 24
  • DOI: 10.1002/2017gl075792
  • Peer Reviewed / Open Access
• [Journal Article] Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction (2017)
  • Author(s): Ogohara, K., M. Takagi, et al.
  • Journal Title: Earth, Planets and Space Volume: 69 Issue: 1 Pages: 1-16
  • DOI: 10.1186/s40623-017-0749-5
  • NAID: 120006486825
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Absolute calibration of brightness temperature of the Venus disk observed by the Longwave Infrared Camera onboard Akatsuki (2017)
  • Author(s): 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
  • Journal Title: Earth, Planets and Space Volume: 69:141 Issue: 1 Pages: 1-9
  • DOI: 10.1186/s40623-017-0727-y
  • NAID: 120006486822
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Characteristics Evaluation and Performance Improvement Method of Balloon-Borne Telescope Pointing Control System (2017)
  • Author(s): Toshihiko Nakano, Makoto Taguchi, Yasuhiro Shoji, Mao Takamura, Daiki Sunaguchi, Masataka Imai, Makoto Watanabe, Yukihiro Takahashi, Yuji Sakamoto, and Kazuya Yoshida
  • Journal Title: 31st ISTS Volume: -
  • NAID: 130007542840
  • Peer Reviewed / Open Access
• [Journal Article] Large stationary gravity wave in the atmosphere of Venus (2017)
  • Author(s): Fukuhara, T., M. Futaguchi, G. L. Hashimoto, T. Horinouchi, T. Imamura, N. Iwagaimi, T. Kouyama, S. Murakami, M. Nakamura, K. Ogohara, M. Sato, T. M. Sato, M. Suzuki, M. Taguchi, S. Takagi, M. Ueno, S. Watanabe, M. Yamada, A. Yamazaki
  • Journal Title: Nature Geosci. Volume: 10 Issue: 2 Pages: 85-88
  • DOI: 10.1038/ngeo2873
  • Peer Reviewed / Open Access
• [Journal Article] Infrared cameras onboard Venus Orbiter Akatsuki (2016)
  • Author(s): Naomoto Iwagami, Takehiko Satoh, Makoto Taguchi, Takeshi Imamura, and Masato Nakamura
  • Journal Title: J. Jpn Soc. Infrared Science & Technology Volume: 26 Pages: 5-12
  • NAID: 40020906753
  • Peer Reviewed
• [Journal Article] AKATSUKI returns to Venus (2016)
  • Author(s): Nakamura, M., Imamura, T., Ishii, N., Abe, T., Kawakatsu, Y., et al. (Sato, T.M. 52名中38番目)
  • Journal Title: Earth, Planets and Space Volume: - Issue: 1 Pages: 68-75
  • DOI: 10.1186/s40623-016-0457-6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] FUJIN-2: Balloon Borne Telescope for Optical Observation of Planets (2016)
  • Author(s): Yasuhiro Shoji, Makoto Taguchi, Toshihiko Nakano, Atsunori Maeda, Masataka Imai, Yuya Goda, Makoto Watanabe, Yukihiro Takahashi, Yuji Sakamoto, and Kazuya Yoshida
  • Journal Title: Trans. JSASS Aerospace Tech. Japan Volume: 14
  • NAID: 130005250056
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Characteristics Evaluation and Performance Improvement Method of Balloon-Borne Telescope Pointing Control System (2017)
  • Author(s): Toshihiko Nakano, Makoto Taguchi, Yasuhiro Shoji, Mao Takamura, Daiki Sunaguchi, Masataka Imai, Makoto Watanabe, Yukihiro Takahashi, Yuji Sakamoto, and Kazuya Yoshida
  • Organizer: 31st International Symposium on Space Technology and Science
  • Int'l Joint Research
• [Presentation] 極周回成層圏テレスコープFUJIN (2017)
  • Author(s): 田口 真、白藤祐稀子、莊司泰弘、中野壽彦、高橋幸弘、今井正尭
  • Organizer: 大気球シンポジウム
• [Presentation] LIRによって観測された金星雲頂高度における温度構造とその時間変化 (2016)
  • Author(s): 神山 徹、田口 真、福原哲哉、佐藤隆雄、二口将彦、はしもとじょーじ、今村 剛
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 九州大学（福岡県福岡市）
  • Year and Date: 2016-11-19
• [Presentation] あかつき中間赤外カメラによる金星極域大気温度構造の解析 (2016)
  • Author(s): 高村真央、神山 徹、田口 真、福原哲哉、今村 剛、佐藤隆雄、二口将彦、はしもとじょーじ、鈴木 睦、岩上直幹、佐藤光輝、高木聖子、上野宗孝、中村正人
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 九州大学（福岡県福岡市）
  • Year and Date: 2016-11-19
• [Presentation] 金星大気中に発見された巨大定在重力波 (2016)
  • Author(s): 田口 真、神山 徹、今村 剛、堀之内武、福原哲哉、二口将彦、はしもとじょーじ、岩上直幹、村上真也、小郷原一智、佐藤光輝、佐藤隆雄、鈴木 睦、高木聖子、上野宗孝、渡部重十、山田 学、山崎 敦、中村正人
  • Organizer: 地球電磁気・地球惑星圏学会
  • Place of Presentation: 九州大学（福岡県福岡市）
  • Year and Date: 2016-11-19
• [Presentation] 極周回成層圏テレスコープ(FUJIN)による惑星大気観測計画 (2016)
  • Author(s): 田口 真、高村真央、砂口大樹、吉田和哉、坂本祐二、中野壽彦、莊司泰弘、高橋幸弘、今井正尭、渡辺 誠
  • Organizer: 大気球シンポジウム
  • Place of Presentation: 宇宙科学研究所（神奈川県相模原市）
  • Year and Date: 2016-11-01
• [Presentation] 金星雲頂高度に発見された巨大重力波 (2016)
  • Author(s): 福原哲哉、はしもとじょーじ、堀之内武、今村 剛、岩上直幹、神山 徹、村上真也、中村正人、小郷原一智、佐藤光輝、佐藤隆雄、鈴木 睦、田口 真、高木聖子、上野宗孝、渡部重十、山田 学
  • Organizer: 日本気象学会
  • Place of Presentation: 名古屋大学（愛知県名古屋市）
  • Year and Date: 2016-10-26
• [Presentation] A bow-shaped thermal structure traveling upstream of the zonal wind flow of Venus atmosphere (2016)
  • Author(s): Makoto Taguchi, Tetsuya Fukuhara, Takeshi Imamura, Toru Kouyama, Masato Nakamura, Takao M. Sato, Munetaka Ueno, Makoto Suzuki, Naomoto Iwagami, Mitsuteru Sato, George L. Hashimoto, and Seiko Takagi
  • Organizer: DPS 48/EPSC 11
  • Place of Presentation: Pasadena (U.S.A.)
  • Year and Date: 2016-10-16
• [Presentation] Venusian Cloud-Top Temperature Observed by Akatsuki/LIR (2016)
  • Author(s): Makoto Taguchi, Testuya Fukuhara, Takeshi Imamura, Masato Nakamura, Takao M. Sato, Naomoto Iwagami, George Hashimoto, Toru Kouyama, Munetaka Ueno, Mitsuteru Sato, Seiko Takagi, Makoto Suzuki
  • Organizer: Asia Oceania Geoscience Society
  • Place of Presentation: Beijing (China)
  • Year and Date: 2016-07-31
• [Presentation] あかつき搭載中間赤外カメラによる金星雲頂温度観測の初期結果 (2016)
  • Author(s): 田口 真、福原哲哉、今村 剛、中村正人、鈴木 睦、佐藤 隆雄、神山 徹、岩上直幹、はしもとじょーじ、佐藤光輝、高木聖子、上野宗孝
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ（千葉県千葉市）
  • Year and Date: 2016-05-22
• [Presentation] Initial results of the Venusian cloud-top temperature observations by Akatsuki/LIR (2016)
  • Author(s): Taguchi, M., T. Fukuhara, T. Imamura, M. Nakamura, M. Suzuki, T. M. Sato, N. Iwagami, M. Ueno, G. L. Hashimoto, T. Kouyama, S. Takagi, and M. Sato
  • Organizer: International Venus Conference 2016
  • Place of Presentation: Oxford (U.K.)
  • Year and Date: 2016-04-04
• [Presentation] Development of the Circumpolar Stratospheric Telescope FUJIN for Observations of Planets (2015)
  • Author(s): YukihiroAtsunori Maeda, Makoto Taguchi, Yasuhiro Shoji, Yukihiro Takahashi, Masataka Imai, Yuya Gouda, Makoto Watanabe, Toshihiko Nakano, Kazuya Yoshida, Yuji Sakamoto
  • Organizer: 米国地球物理学連合
  • Place of Presentation: サンフランシスコ（米国）
  • Year and Date: 2015-12-14
• [Presentation] 極周回成層圏テレスコープ(FUJIN)による惑星大気観測計画 (2015)
  • Author(s): 田口 真、前田惇徳、高村真央、吉田和哉、坂本祐二、中野壽彦、荘司泰弘、高橋幸弘、渡辺 誠、今井正尭、合田雄哉
  • Organizer: 大気球シンポジウム
  • Place of Presentation: 宇宙科学研究所（神奈川県・相模原市）
  • Year and Date: 2015-11-05
• [Presentation] 惑星観測を目指した極周回成層圏望遠鏡FUJIN (2015)
  • Author(s): 前田惇徳、 田口 真、荘司泰弘、中野壽彦、高橋幸弘、今井正尭、合田雄哉、吉田和哉、坂本祐二
  • Organizer: 日本地球惑星科学連合
  • Place of Presentation: 幕張メッセ（千葉県・千葉市）
  • Year and Date: 2015-05-24