Imamura, T., Kita, K., Iwagami, N., & Ogawa, T. (1995). Gravity Wave Characteristics Derived from and Multiple Es Structured Layers Atomic Oxygen Profile. Journal of Geomagnetism and Geoelectricity, 47, 961–972. https://doi.org/10.5636/jgg.47.961
Imamura, T., & Ogawa, T. (1995). A Sensitivity Study to Infer Tropospheric Ozone from Atmospheric Thermal Emission at 9.6 μm Wavelength Measured with a Nadir View from a Satellite. Journal of the Meteorological Society of Japan. Ser. II, 73(2), 255–258. https://doi.org/10.2151/jmsj1965.73.2_255
Imamura, T., & Ogawa, T. (1995). Radiative damping of gravity waves in the terrestrial planetary atmospheres. Geophysical Research Letters, 22(3), 267–270. https://doi.org/10.1029/94GL02998
Kita, K., Imamura, T., Iwagami, N., Morrow, W. H., & Ogawa, T. (1996). Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique. Annales Geophysicae, 14(2), 227–237. https://doi.org/10.1007/s00585-996-0227-z
Kita, K., Imamura, T., Iwagami, N., Morrow, W. ., & Ogawa, T. (1996). Variability of oxygen atom concentration in the lower thermosphere observed by rocket experiments. Advances in Space Research, 17(11), 85–88. https://doi.org/10.1016/0273-1177(95)00734-V
Imamura, T., & Ogawa, T. (1997). Parameterization of surface brightness temperature to retrieve trace gases from radiance spectra measured with a nadir view. Journal of Atmospheric and Oceanic Technology, 14(4), 988–993. https://doi.org/10.1175/1520-0426(1997)014<0988:POSBTT>2.0.CO;2
Imamura, T. (1997). Momentum balance of the Venusian midlatitude mesosphere. Journal of Geophysical Research: Planets, 102(E3), 6615–6620. https://doi.org/10.1029/96JE03882
Imamura, T., Kita, K., Iwagami, N., & Ogawa, T. (1997). Gravity wave signature simultaneously observed in the oxygen atom and electron density profiles in the lower thermosphere. Advances in Space Research, 19(1), 145–148. https://doi.org/10.1016/S0273-1177(96)00045-2
Imamura, T., & Hashimoto, G. L. (1998). Venus cloud formation in the meridional circulation. Journal of Geophysical Research, 103(E13), 31349-31366. https://doi.org/10.1029/1998JE900010
Mukai, T., Akabane, T., Hashimoto, T., Ishimoto, H., Sasaki, S., Inada, A., Toigo, A., Nakamura, M., Abe, Y., Kurita, K., & Imamura, T. (1998). Observation of Mars and its satellites by the Mars Imaging Camera (MIC) on Planet-B. Earth, Planets and Space, 50(3), 183–188. https://doi.org/10.1186/BF03352101
Hashimoto, G. L., & Imamura, T. (2001). Elucidating the rate of volcanism on venus: Detection of lava eruptions using near-infrared observations. Icarus, 154(2), 239–243. https://doi.org/10.1006/icar.2001.6713
Noguchi, K., Imamura, T., Oyama, K. I., & Saito, A. (2001). Application of the GPS network to estimate the effect of the terrestrial ionosphere on the radio occultation measurements of planetary ionospheres. Radio Science, 36(6), 1607–1613. https://doi.org/10.1029/2000RS002591
Oyama, K. -I., Nabatov, A. S., Savich, N. A., Yamamoto, Z., Imamura, T., Ichikawa, T., & Noguchi, K. (2001). First test of the NOZOMI radio science system in actual space flight. Advances in Space Research, 27(11), 1847–1850. https://doi.org/10.1016/S0273-1177(01)00307-6
Imamura, T., & Hashimoto, G. L. (2002). H2SO4 cycle in the Venusian tropical atmosphere as constrained by a microphysical cloud model. Advances in Space Research, 29(2), 249–254. https://doi.org/10.1016/S0273-1177(01)00575-0
Oyama, K. -I., Nabatov, A. S., Savich, N. A., Imamura, T., Yamamoto, Z., & Noguchi, K. (2002). Cislunar plasma exploration with the SELENE radio science system. Advances in Space Research, 30(8), 1915–1919. https://doi.org/10.1016/S0273-1177(02)00488-X
Oyama, K. -I., Imamura, T., & Abe, T. (2002). Feasibility study for Venus atmosphere mission. Advances in Space Research, 29(2), 265–271. https://doi.org/10.1016/S0273-1177(01)00577-4
Noguchi, K., Imamura, T., Oyama, K. -I., & Nabatov, A. S. (2002). Radio-occultation projects in space programs of Japan. URSI Radio Science Bulletin, 2002(303), 27–31.
Nabatov, A. S., Imamura, T., Savich, N. A., Oyama, K. -I., & Noguchi, K. (2003). Detectability of lunar plasma clouds from SELENE radio occultations. Advances in Space Research, 31(11), 2369–2375. https://doi.org/10.1016/S0273-1177(03)00548-9
Imamura, T., Horinouchi, T., & Dunkerton, T. J. (2004). The lateral transport of zonal momentum due to Kelvin waves in a meridional circulation. Journal of the Atmospheric Sciences, 61, 1966–1975. https://doi.org/10.1175/1520-0469(2004)061<1966:TLTOZM>2.0.CO;2
Ishii, N., Yamakawa, H., Sawai, S., Shida, M., Hashimoto, T., Nakamura, M., Imamura, T., Abe, T., Oyama, K., & Nakatani, I. (2004). Current status of the PLANET-C Venus orbiter design. Advances in Space Research, 34(8), 1668–1672. https://doi.org/10.1016/j.asr.2004.07.006
Izutsu, N., Yajima, N., Honda, H., & Imamura, T. (2004). Venus balloons using water vapor. Advances in Space Research, 33(10), 1831–1835. https://doi.org/10.1016/j.asr.2003.07.050
Imamura, T., Noguchi, K., Nabatov, A., Oyama, K.-I., Yamamoto, Z., & Tokumaru, M. (2005). Phase scintillation observation during coronal sounding experiments with NOZOMI spacecraft. Astronomy and Astrophysics, 439(3), 1165–1169. https://doi.org/10.1051/0004-6361:20042614
Fukuhara, T., & Imamura, T. (2005). Waves encircling the summer southern pole of Mars observed by MGS TES. Geophysical Research Letters, 32, L18811. doi:10.1029/2005GL023819
Ohtsuki, S., Iwagami, N., Sagawa, H., Kasaba, Y., Ueno, M., & Imamura, T. (2005). Ground-based observation of the Venus 1.27-μm O2 airglow. Advances in Space Research, 36(11), 2038–2042. https://doi.org/10.1016/j.asr.2005.05.078
Imamura, T. (2006). Meridional Propagation of Planetary-Scale Waves in Vertical Shear: Implication for the Venus Atmosphere. Journal of the Atmospheric Sciences, 63(6), 1623–1636. https://doi.org/10.1175/JAS3684.1
Noguchi, K., Imamura, T., Oyama, K. -I., & Bodeker, G. E. (2006). A global statistical study on the origin of small-scale ozone vertical structures in the lower stratosphere. Journal of Geophysical Research: Atmospheres, 111(23). https://doi.org/10.1029/2006JD007232
Häusler, B., Pätzold, M., Tyler, G. L., Simpson, R. A., Bird, M. K., Dehant, V., Barriot, J.-P., Eidel, W., Mattei, R., Remus, S., Selle, J., Tellmann, S., & Imamura, T. (2006). Radio science investigations by VeRa onboard the Venus Express spacecraft. Planetary and Space Science, 54(13–14), 1315–1335. https://doi.org/10.1016/j.pss.2006.04.032
Imamura, T., Kawasaki, Y., & Fukuhara, T. (2007). Mesoscale Spectra of Mars’s Atmosphere Derived from MGS TES Infrared Radiances. Journal of the Atmospheric Sciences, 64(5), 1717–1726. https://doi.org/10.1175/JAS3914.1
Nakamura, M., Imamura, T., Ueno, M., Iwagami, N., Satoh, T., Watanabe, S., Taguchi, M., Takahashi, Y., Suzuki, M., Abe, T., Hashimoto, G. L., Sakanoi, T., Okano, S., Kasaba, Y., Yoshida, J., Yamada, M., Ishii, N., Yamada, T., & Oyama, K.-I. (2007). Planet-C: Venus Climate Orbiter mission of Japan. Planetary and Space Science, 55(12), 1831–1842. https://doi.org/10.1016/j.pss.2007.01.009
Fukuhara, T., & Imamura, T. (2007). Diurnally varying structure of stationary waves encircling the summer southern pole of Mars observed by MGS TES. Geophysical Research Letters, 34, L09809 https://doi.org/10.1029/2006GL028498
Taguchi, M., Fukuhara, T., Imamura, T., Nakamura, M., Iwagami, N., Ueno, M., Suzuki, M., Hashimoto, G. L., & Mitsuyama, K. (2007). Longwave Infrared Camera onboard the Venus Climate Orbiter. Advances in Space Research, 40(6), 861–868. https://doi.org/10.1016/j.asr.2007.05.085
Pätzold, M., Häusler, B., Bird, M. K., Tellmann, S., Mattei, R., Asmar, S. W., Dehant, V., Eidel, W., Imamura, T., Simpson, R. A., & Tyler, G. L. (2007). The structure of Venus’ middle atmosphere and ionosphere. Nature, 450, 657–660. https://doi.org/10.1038/nature06239
Imamura, T., Oyama, K. -I., Iwata, T., Kono, Y., Matsumoto, K., Liu, Q., Noda, H., Futaana, Y., & Nabatov, A. (2008). The possibility of studying the lunar ionosphere with the SELENE radio science experiment. Earth, Planets and Space, 60(4), 387–390. https://doi.org/10.1186/BF03352803
Ohtsuki, S., Iwagami, N., Sagawa, H., Ueno, M., Kasaba, Y., Imamura, T., & Nishihara, E. (2008). Imaging spectroscopy of the Venus 1.27-μm O2 airglow with ground-based telescopes. Advances in Space Research, 41(9), 1375–1380. https://doi.org/10.1016/j.asr.2007.10.014
Iwagami, N., Ohtsuki, S., Tokuda, K., Ohira, N., Kasaba, Y., Imamura, T., Sagawa, H., Hashimoto, G.L., Takeuchi, S., Ueno, M., & Okumura, S. (2008). Hemispheric distributions of HCl above and below the Venus’ clouds by ground-based 1.7 μm spectroscopy. Planetary and Space Science, 56(10), 1424–1434. https://doi.org/10.1016/j.pss.2008.05.009
Chassefière, E., Korablev, O., Imamura, T., Baines, K. H., Wilson, C. F., Titov, D. V., Aplin, K. L., Balint, T., Blamont, J. E., Cochrane, C. G., Ferencz, Cs., Ferri, F., Gerasimov, M., Leitner, J. J., Lopez-Moreno, J., Marty, B., Martynov, M., Pogrebenko, S. V., Rodin, A., Whiteway, J. A., Zasova,L. V., Michaud, J., Bertrand, R., Charbonnier, J. -M., Carbonne, D., Raizonville, P., & EVE team. (2009). European Venus Explorer (EVE): An in-situ mission to Venus. Experimental Astronomy, 23(3), 741–760. https://doi.org/10.1007/s10686-008-9093-x
Fukuhara, T., & Imamura, T. (2008). Hemispheric difference in the momentum transport by waves encircling the summer polar region of Mars observed by MGS TES. Journal of Geophysical Research: Planets, 113, E05006. https://doi.org/10.1029/2007JE002999
Takahashi, Y., Yoshida, J., Yair, Y., Imamura, T., & Nakamura, M. (2008). Lightning detection by LAC onboard the Japanese venus climate orbiter, Planet-C. Space Science Reviews, 137(1–4), 317–334. https://doi.org/10.1007/s11214-008-9400-x
Imamura, T., & Kobayashi, H. (2009). Wavenumber spectra of planetary-scale disturbances in the Mars atmosphere. Icarus, 199(2), 286–294. https://doi.org/10.1016/j.icarus.2008.09.021
Imamura, T., Iwata, T., Yamamoto, Z. I., Mochizuki, N., Kono, Y., Matsumoto, K., Liu, Q., Noda, H., Hanada, H., Oyama, K. -I., Nabatov, A., Futaana, Y., Saito, A., & Ando, H. (2010). Studying the lunar ionosphere with SELENE radio science experiment. Space Science Reviews, 154(1–4), 305–316. https://doi.org/10.1007/s11214-010-9660-0
Efimov, A. I., Imamura, T., Oyama, K., Noguchi, K., Samoznaev, L. N., Nabatov, A. S., Bird, M. K., & Chashei, I. V. (2010). Properties of solar wind turbulence from radio occultation experiments with the NOZOMI spacecraft. Astronomy Reports, 54(11), 1032–1041. https://doi.org/10.1134/S1063772910110089
Nakamura, M., Imamura, T., Ishii, N., Abe, T., Satoh, T., Suzuki, M., Ueno, M., Yamazaki, A., Iwagami, N., Watanabe, S., Taguchi, M., Fukuhara, T., Takahashi, Y., Yamada, M., Hoshino, N., Ohtsuki, S., Uemizu, K., Hashimoto, G. L., Takagi, M., Matsuda, Y., Ogohara, K., Sato, N., Kasaba, Y., Kouyama, T., Hirata, N., Nakamura, R., Yamamoto, Y., Okada, N., Horinouchi, T., Yamamoto, M., & Hayashi, Y. (2011). Overview of Venus orbiter, Akatsuki. Earth Planets Space, 63(5), 443–457. https://doi.org/10.5047/eps.2011.02.009
Imamura, T., Toda, T., Tomiki, A., Hirahara, D., Hayashiyama, T., Mochizuki, N., Yamamoto, Z., Abe, T., Iwata, T., Noda, H., Futaana, Y., Ando, H., Haeusler, B., Patzold, M., & Nabatov, A. (2011). Radio occultation experiment of the Venus atmosphere and ionosphere with the Venus orbiter Akatsuki. Earth, Planets and Space, 63(6), 493–501. https://doi.org/10.5047/eps.2011.03.009
Fukuhara, T., Taguchi, M., Imamura, T., Nakamura, M., Ueno, M., Suzuki, M., Iwagami, N., Sato, M., Mitsuyama, K., Hashimoto, G. L., Ohshima, R., Kouyama, T., Ando, H., & Futaguchi, M. (2011). LIR: Longwave infrared camera onboard the venus orbiter Akatsuki. Earth, Planets and Space, 63(9), 1009–1018. https://doi.org/10.5047/eps.2011.06.019
Kouyama, T., Imamura, T., Nakamura, M., Satoh, T., & Futaana, Y. (2012). Horizontal structure of planetary-scale waves at the cloud top of Venus deduced from Galileo SSI images with an improved cloud-tracking technique. Planetary and Space Science, 60(1), 207–216. https://doi.org/10.1016/j.pss.2011.08.008
Ogohara, K., Kouyama, T., Yamamoto, H., Sato, N., Takagi, M., & Imamura, T. (2012). A Newly Developed Cloud Tracking System for the Venus Climate Orbiter Akatsuki and Preliminary Results Using Venus Express Data. Theoretical and Applied Mechanics Japan, 60, 193–202. https://doi.org/10.11345/nctam.60.193
Ogohara, K., Kouyama, T., Yamamoto, H., Sato, N., Takagi, M., & Imamura, T. (2012). Automated cloud tracking system for the Akatsuki Venus Climate Orbiter data. Icarus, 217(2), 661–668. https://doi.org/10.1016/j.icarus.2011.05.017
Taguchi, M., Fukuhara, T., Futaguchi, M., Sato, M., Imamura, T., Mitsuyama, K., Nakamura, M., Ueno, M., Suzuki, M., Iwagami, N., & Hashimoto, G. L. (2012). Characteristic features in Venus’ nightside cloud-top temperature obtained by Akatsuki/LIR. Icarus, 219(1), 502–504. https://doi.org/10.1016/j.icarus.2012.01.024
Ando, H., Imamura, T., & Tsuda, T. (2012). Vertical Wavenumber Spectra of Gravity Waves in the Martian Atmosphere Obtained from Mars Global Surveyor Radio Occultation Data. Journal of the Atmospheric Sciences, 69(9), 2906–2912. https://doi.org/10.1175/JAS-D-11-0339.1
Imamura, T., Nabatov, A., Mochizuki, N., Iwata, T., Hanada, H., Matsumoto, K., Noda, H., Kono, Y., Liu, Q., Futaana, Y., Ando, H., Yamamoto, Z., Oyama, K. -I., & Saito, A. (2012). Radio occultation measurement of the electron density near the lunar surface using a subsatellite on the SELENE mission. Journal of Geophysical Research: Space Physics, 117, A06303. https://doi.org/10.1029/2011JA017293
Ando, H., Imamura, T., Nabatov, A., Futaana, Y., Iwata, T., Hanada, H., Matsumoto, K., Mochizuki, N., Kono, Y., Noda, H., Liu, Q., Oyama, K. -I., Yamamoto, Z., & Saito, A. (2012). Dual-spacecraft radio occultation measurement of the electron density near the lunar surface by the SELENE mission. Journal of Geophysical Research: Space Physics, 117, A08313. https://doi.org/10.1029/2011JA017141
Tellmann, S., Häusler, B., Hinson, D. P., Tyler, G. L., Andert, T. P., Bird, M. K., Imamura, T., Patzold, M., & Remus, S. (2012). Small-scale temperature fluctuations seen by the VeRa Radio Science Experiment on Venus Express. Icarus, 221(2), 471–480. https://doi.org/10.1016/j.icarus.2012.08.023
Kouyama, T., Imamura, T., Nakamura, M., Satoh, T., & Futaana, Y. (2013). Long-term variation in the cloud-tracked zonal velocities at the cloud top of Venus deduced from Venus Express VMC images. Journal of Geophysical Research: Planets, 118(1), 37–46. https://doi.org/10.1029/2011JE004013
Imamura, T., Higuchi, T., Maejima, Y., Takagi, M., Sugimoto, N., Ikeda, K., & Ando, H. (2014). Inverse insolation dependence of Venus’ cloud-level convection. Icarus, 228, 181–188. https://doi.org/10.1016/j.icarus.2013.10.012
Imamura, T., Tokumaru, M., Isobe, H., Shiota, D., Ando, H., Miyamoto, M., Toda, T., Häusler, B., Pätzold, M., Nabatov, A., Asai, A., Yaji, K., Yamada, M., & Nakamura, M. (2014). Outflow structure of the quiet sun corona probed by spacecraft radio scintillations in strong scattering. Astrophysical Journal, 788(2), 117(10pp). https://doi.org/10.1088/0004-637X/788/2/117
Peralta, J., Imamura, T., Read, P. L., Luz, D., Piccialli, A., & López-Valverde, M. A. (2014a). Analytical solution for waves in planets with atmospheric superrotation. I. Acoustic and inertia-gravity waves. Astrophysical Journal, Supplement Series, 213(1). https://doi.org/10.1088/0067-0049/213/1/17
Peralta, J., Imamura, T., Read, P. L., Luz, D., Piccialli, A., & López-Valverde, M. A. (2014b). Analytical solution for waves in planets with atmospheric superrotation. II. Lamb, surface, and centrifugal waves. Astrophysical Journal, Supplement Series, 213(1). https://doi.org/10.1088/0067-0049/213/1/18
Sato, T. M., Sagawa, H., Kouyama, T., Mitsuyama, K., Satoh, T., Ohtsuki, S., Ueno, M., Kasaba, Y., Nakamura, M., & Imamura, T. (2014). Cloud top structure of Venus revealed by Subaru/COMICS mid-infrared images. Icarus, 243, 386–399. https://doi.org/10.1016/j.icarus.2014.09.004
Miyamoto, M., Imamura, T., Tokumaru, M., Ando, H., Isobe, H., Asai, A., Shiota, D., Toda, T., Häusler, B., Pätzold, M., Nabatov, A., & Nakamura, M. (2014). Radial distribution of compressive waves in the solar corona revealed by Akatsuki radio occultation observations. Astrophysical Journal, 797(1), 51(7pp). https://doi.org/10.1088/0004-637X/797/1/51
Satoh, T., Ohtsuki, S., Iwagami, N., Ueno, M., Uemizu, K., Suzuki, M., Hashimoto, G. L., Sakanoi, T., Kasaba, Y., Nakamura, R., Imamura, T., Nakamura, M., Fukuhara, T., Yamazaki, A., & Yamada, M. (2015). Venus’ clouds as inferred from the phase curves acquired by IR1 and IR2 on board Akatsuki. Icarus, 248, 213–220. https://doi.org/10.1016/j.icarus.2014.10.030
Kouyama, T., Imamura, T., Nakamura, M., Satoh, T., & Futaana, Y. (2015). Vertical propagation of planetary-scale waves in variable background winds in the upper cloud region of Venus. Icarus, 248, 560–568. https://doi.org/10.1016/j.icarus.2014.07.011
Kanao, M., Shimizu, T., Imamura, T., & Nakamura, M. (2015). Hinode SOT Plate Scale Reinvestigated by G-Band Images on the 2012 Transit of Venus. Solar Physics, 290(5), 1491–1506. https://doi.org/10.1007/s11207-015-0675-2
Lee, Y. J., Imamura, T., Schröder, S. E., & Marcq, E. (2015). Long-term variations of the UV contrast on Venus observed by the Venus Monitoring Camera on board Venus Express. Icarus, 253, 1–15. https://doi.org/10.1016/j.icarus.2015.02.015
Ando, H., Imamura, T., Tsuda, T., Tellmann, S., Pätzold, M., & Häusler, B. (2015). Vertical Wavenumber Spectra of Gravity Waves in the Venus Atmosphere Obtained from Venus Express Radio Occultation Data: Evidence for Saturation. Journal of the Atmospheric Sciences, 72(6), 2318–2329. https://doi.org/10.1175/JAS-D-14-0315.1
Ando, H., Shiota, D., Imamura, T., Tokumaru, M., Asai, A., Isobe, H., Pazold, M., Hausler, B., & Nakamura, M. (2015). Internal structure of a coronal mass ejection revealed by Akatsuki radio occultation observations. Journal of Geophysical Research A: Space Physics, 120(7), 5318–5328. https://doi.org/10.1002/2015JA021076
Imamura, T., Watanabe, A., & Maejima, Y. (2016). Convective generation and vertical propagation of fast gravity waves on Mars: One- and two-dimensional modeling. Icarus, 267, 51–63. https://doi.org/10.1016/j.icarus.2015.12.005
Ando, H., Sugimoto, N., Takagi, M., Kashimura, H., Imamura, T., & Matsuda, Y. (2016). The puzzling Venusian polar atmospheric structure reproduced by a general circulation model. Nature Communications, 7, 10398. https://doi.org/10.1038/ncomms10398
Nakamura, M., Imamura, T., Ishii, N., Abe, T., Kawakatsu, Y., Hirose, C., Satoh, T., Suzuki, M., Ueno, M., Yamazaki, A., Iwagami, N., Watanabe, S., Taguchi, M., Fukuhara, T., Takahashi, Y., Yamada, M., Imai, M., Ohtsuki, S., Uemizu, K., Hashimoto, G.L., Takagi, M., Matsuda, Y., Ogohara, K., Sato, N., Kasaba, Y., Kouyama, T., Hirata, N., Nakamura, R., Yamamoto, Y., Horinouchi, T., Yamamoto, M., Hayashi, Y., Kashimura, H., Sugiyama, K., Sakanoi, T., Ando, H., Murakami, S., Sato, T. M., Takagi, S., Nakajima, K., Peralta, J., Lee, Y. J., Nakatsuka, J., Ichikawa, T., Inoue, K., Toda, T., Toyota, H., Tachikawa, S., Narita, S., Hayashiyama, T., Hasegawa, A., & Kamata, Y. (2016). AKATSUKI returns to Venus. Earth, Planets and Space, 68(1). https://doi.org/10.1186/s40623-016-0457-6
Satoh, T., Sato, T.M., Nakamura, M., Kasaba, Y., Ueno, M., Suzuki, M., Hashimoto, G. L., Horinouchi, T., Imamura, T., Yamazaki, A., Enomoto, T., Sakurai, Y., Takami, K., Sawai, K., Nakakushi, T., Abe, T. (2017). Earth Planets Space, 69: 154. https://doi.org/10.1186/s40623-017-0736-x
Fukuhara, T., Futaguchi, M., Hashimoto, G. L., Horinouchi, T., Imamura, T., Iwagaimi, N., Kouyama, T., Murakami, S., Nakamura, M., Ogohara, K., Sato, M., Sato, T. M., Suzuki, M., Taguchi, M., Takagi, S., Ueno, M., Watanabe, S., Yamada, M., Yamazaki, A. (2017). Large stationary gravity wave in the atmosphere of Venus. Nature Geo., 10, 85–88. https://doi.org/10.1038/ngeo2873
Muto, K., & Imamura, T. (2017). Morphology and temporal variation of the polar oval of Venus revealed by VMC/Venus express visible and UV images. Icarus, 295, 110–118. https://doi.org/10.1016/j.icarus.2017.06.014
Peralta, J., Lee, Y. J., Hueso, R., Clancy, R. T., Sandor, B. J., Sánchez-Lavega, A., Lellouch, E., Rengel, M., Machado, P., Omino, M., Piccialli, A., Imamura, T., Horinouchi, T., Murakami, S., Ogohara, K., Luz, D., & Peach, D. (2017). Venus’s winds and temperatures during the MESSENGER’s flyby: An approximation to a three-dimensional instantaneous state of the atmosphere. Geophysical Research Letters, 44(8), 3907–3915. https://doi.org/10.1002/2017GL072900
Lee, Y. J., Yamazaki, A., Imamura, T., Yamada, M., Watanabe, S., Sato, T. M., Ogohara, K., Hashimoto, G. L., & Murakami, S. (2017). Scattering Properties of the Venusian Clouds Observed by the UV Imager on board Akatsuki. The Astronomical Journal, 154(2), 44. https://doi.org/10.3847/1538-3881/aa78a5
Peralta, J., Hueso, R., Sánchez-Lavega, A., Lee, Y. J., Munõz, A. G., Kouyama, T., Sagawa, H., Sato, T. M., Piccioni, G., Tellmann, S., Imamura, T., & Satoh, T. (2017). Stationary waves and slowly moving features in the night upper clouds of Venus. Nature Astronomy, 1. https://doi.org/10.1038/s41550-017-0187
Ando, H., Imamura, T., Sugimoto, N., Takagi, M., Kashimura, H., Tellmann, S., Pätzold, M., Häusler, B., & Matsuda, Y. (2017). Vertical structure of the axi-asymmetric temperature disturbance in the Venusian polar atmosphere: Comparison between radio occultation measurements and GCM results. Journal of Geophysical Research: Planets, 122(8), 1687–1703. https://doi.org/10.1002/2016JE005213
Imamura, T., Ando, H., Tellmann, S., Pätzold, M., Häusler, B., Yamazaki, A., Sato, T. M., Noguchi, K., Futaana, Y., Oschlisniok, J., Limaye, S., Choudhary, R. K., Murata, Y., Takeuchi, H., Hirose, C., Ichikawa, T., Toda, T., Tomiki, A., Abe, T., Yamamoto, Z., Noda, H., Iwata, T., Murakami, S., Satoh, T., Fukuhara, T., Ogohara, K., Sugiyama, K., Kashimura, H., Ohtsuki, S., Takagi, S., Yamamoto, Y., Hirata, N., Hashimoto, G. L., Yamada, M., Suzuki, M., Ishii, N., Hayashiyama, T., Lee, Y. J., & Nakamura, M. (2017). Initial performance of the radio occultation experiment in the Venus orbiter mission Akatsuki. Earth, Planets and Space, 69. https://doi.org/10.1186/s40623-017-0722-3
Horinouchi, T., Murakami, S. Y., Satoh, T., Peralta, J., Ogohara, K., Kouyama, T., Imamura, T., Kashimura, H., Limaye, S. S., McGouldrick, K.,Nakamura, M., Sato, T. M., Sugiyama, K., Takagi, M., Watanabe, S., Yamada, M., Yamazaki, A., & Young, E. F. (2017). Equatorial jet in the lower to middle cloud layer of Venus revealed by Akatsuki. Nature Geoscience, 10(9), 646–651. https://doi.org/10.1038/ngeo3016
Sánchez-Lavega, A., Lebonnois, S., Imamura, T., Read, P., & Luz, D. (2017). The Atmospheric Dynamics of Venus. Space Science Reviews, 212(3), 1541-1616. https://doi.org/10.1007/s11214-017-0389-x
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., Horinouch, T., Sato, N., Yamada, M., Yamamoto, Y., Ohtsuki, S., Sugiyama, K., Ando, H., Takamura, M., Yamada, T., Satoh, T., Nakamura, M. (2017). Topographical and local time dependence of large stationary gravity waves observed at the cloud top of Venus. Geophys. Res. Lett., 44, 12,098-12,105. Doi:10.1002/2017GL075792
Ogohara, K., Takagi, M., Murakami, S., Horinouchi. T., Yamada, M., Kouyama, T., Hashimoto, G. L., Imamura, T., et al. (2017). Overview of Akatsuki data products: definition of data levels, method and accuracy of geometric correction. Earth Planets Space, 69:167. doi.org/10.1186/s40623-017-0749-5
Fukuhara, T., Taguchi, M., Imamura, T., Hayashitani, A., Yamada, T., Futaguchi, M., Kouyama, T., Sato, T. M., Takamura, M., Iwagami, N., Nakamura, M., Suzuki, M., Ueno, M., Hashimoto, G. L., Sato, M., Takagi, S., Yamazaki, A., Yamada, M., Murakami, S., Yamamoto, Y., Ogohara, K., Ando, H., Sugiyama, K., Kashimura, H., Ohtsuki, S., Ishii, N., Abe, T., Satoh, T., Hirose, C., Hirata, N. (2017). Absolute calibration of brightness temperature of the Venus disk observed by the Longwave Infrared Camera onboard Akatsuki. Earth Planets Space, 69:141. DOI 10.1186/s40623-017-0727-y
Limaye, S.S., Lebonnois, S., Mahieux, A., Pätzold, M., Bougher, S., Bruinsma, S., Chamberlain, S., Clancy, R.T., Gérard, J.-C., Gilli, G., Grassi, D., Haus, R., Herrmann, M., Imamura, T., Kohler, E., Krause, P., Migliorini, A., Montmessin, F., Pere, C., Persson, M., Piccialli, A., Rengel, M., Rodin, A., Sandor, B., Sornig, M., Svedhem, H., Tellmann, S., Tanga, P., Vandaele, A.C., Widemann, T., Wilson, C.F., Müller-Wodarg, I., Zasova, L. (2017). The thermal structure of the venus atmosphere: intercomparison of Venus Express and ground based observations of vertical temperature and density profiles. Icarus, 294, 124–155.
Iwagami, N., Sakanoi, T., Hashimoto, G. L., Sawai, K., Ohtsuki, S., Takagi, S., Uemizu, K., Ueno, M., Kameda, S., Murakami, S., Nakamura, M., Ishii, N., Abe, T., Satoh, T., Imamura, T., Hirose, C., Suzuki, M., Hirata, N., Yamazaki, A., Sato, T. M., Yamada, M., Yamamoto, Y., Fukuhara, T., Ogohara, K., Ando, H., Sugiyama, K., Kashimura, H., Kouyama, T. (2018). Initial products of Akatsuki 1-μm camera. Earth Planets Space, 70: 6. https://doi.org/10.1186/s40623-017-0773-5
Limaye, S. S., S. Watanabe, A. Yamazaki, M. Yamada, T. Satoh, T. M. Sato, M. Nakamura, M. Taguchi, T. Fukuhara, T. Imamura, T. Kouyama, Y.-J. Lee, T. Horinouchi, J. Peralta, N. Iwagami, G. L. Hashimoto, S. Takagi, S. Ohtsuki, S. Murakami, Y. Yamamoto, K. Ogohara, H. Ando, K. Sugiyama, N. Ishii, T. Abe, C. Hirose, M. Suzuki, N. Hirata, E. F. Young, A. C. Ocampo (2018). Venus looks different from day to night across wavelengths: morphology from Akatsuki multispectral images. Earth Planets Space, 70: 24. https://doi.org/10.1186/s40623-018-0789-5
Yamazaki, A., Yamada, M., Lee, Y.J, 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 and Masato Nakamura. Ultraviolet imager on Venus orbiter Akatsuki and its initial results. Earth Planets Space (2018) 70: 23. https://doi.org/10.1186/s40623-017-0772-6
Imamura, T., Miyamoto, M., Ando, H., Häusler, B., Pätzold, M., Tellmann, S., Tsuda, T., Aoyama, Y., Murata, Y., Takeuchi, H., Yamazaki, A., Toda, T., & Tomiki, A. (2018). Fine vertical structures at the cloud heights of Venus revealed by radio holographic analysis of Venus Express and Akatsuki radio occultation data. J. Geophys. Res., 123. https://doi.org/10.1029/ 2018JE005627
Ando, H., Takagi, M., Fukuhara, T., Imamura, T., Sugimoto, N., Sagawa, H., Noguchi, K., Tellmann, S., Pätzold, M., Häusler, B., Murata, Y., Takeuchi, H., Yamazaki, A., Toda, T., Tomiki, A., Choudhary, R., Kumar, K., Ramkumar, G., & Antonitaet, M. (2018). Local time dependence of the thermal structure in the Venusian equatorial upper atmosphere: Comparison of Akatsuki radio occultation measurements and GCM results. J. Geophys. Res., 123. https://doi.org/10.1029/2018JE005640
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, (2018). Nightside winds at the lower clouds of Venus with Akatsuki/IR2: longitudinal, local time, and decadal variations from comparison with previous measurements. Astrophys. J. Supp., 239:29. https://doi.org/10.3847/1538-4365/aae844
Peralta, J., N. Iwagami, A. Sánchez-Lavega, Y. J. Lee, R. Hueso, M. Narita, T. Imamura, P. Miles, A. Wesley, E. Kardasis, and S. Takagi (2019). Morphology and dynamics of Venus’s middle clouds with Akatsuki/IR1. Geophys. Res Lett., 46, 2399-2407. https://doi.org/10.1029/2018GL081670
Kopparla, Y. J. Lee, T. Imamura, A. Yamazaki, Principal components of short-term variability in the ultraviolet albedo of Venus. A&A, 2019. https://doi.org/10.1051/0004-6361/201935388
Nara, Y., Imamura, T., Murakami, S., Kouyama, T., Ogohara, K., Yamada, M., et al. (2019). Formation of the Y feature at the Venusian cloud top by planetary‐scale waves and the mean circulation: Analysis of Venus Express VMC images. Journal of Geophysical Research: Planets, 124. https://doi.org/ 10.1029/2018JE005779
Kitahara, T., Imamura, T., Sato, T. M., Yamazaki, A., Lee, Y. J., Yamada, M., et al. (2019). Stationary features at the cloud top of Venus observed by Ultraviolet Imager onboard Akatsuki. Journal of Geophysical Research: Planets, 124. https://doi.org/10.1029/ 2018JE005842
J. Peralta, A. Sánchez-Lavega, T. Horinouchi, K. McGouldrick, I. Garate-Lopez, E.F. Young, M.A. Bullock, Y.J. Lee, T. Imamura, T. Satoh, S.S. Limaye, New cloud morphologies discovered on the Venus’s night during Akatsuki, Icarus, 333, 177-182, 2019. https://doi.org/10.1016/j.icarus.2019.05.026
Lorenz, R. D., Imai, M., Takahashi, Y., Sato, M., Yamazaki, A., Sato, T. M. et al. (2019). Constraints on Venus lightning from Akatsuki’s first 3 years in orbit. Geophysical Research Letters, 46, 7955–7961. https://doi.org/10.1029/ 2019GL083311
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, Global structure of thermal tides in the upper cloud layer of Venus revealed by LIR onboard Akatsuki. Geophys. Res. Lett. 46, 9457-9465, 2019. https://doi.org/10.1029/2019GL083820.
M. Imai, T. Kouyama, Y. Takahashi, A. Yamazaki, S. Watanabe, M. Yamada, T. Imamura, T. Satoh, M. Nakamura, S. Murakami, K. Ogohara, T. Horinouchi (2019). Planetary‐scale variations in winds and UV brightness at the Venusian cloud top: Periodicity and temporal evolution. Journal of Geophysical Research: Planets, 124. https://doi.org/10.1029/2019JE006065
T. Horinouchi , T. Kouyama, Y. J. Lee, S. Murakami, K. Ogohara, M. Takagi, T. Imamura, K. Nakajima, J. Peralta, A. Yamazaki, M. Yamada, S. Watanabe, Mean winds at the cloud top of Venus obtained from two-wavelength UV imaging by Akatsuki. Earth Planets Space 70, 10 (2018). https://doi.org/10.1186/s40623-017-0775-3
T. Yamada, T. Imamura, T. Fukuhara, M. Taguchi, Influence of the cloud-level neutral layer on the vertical propagation of topographically generated gravity waves on Venus. Earth Planets Space 71, 123 (2019)
Yeon Joo Lee, Kandis-Lea Jessup, Santiago Perez-Hoyos, Dmitrij V. Titov, Sebastien Lebonnois, Javier Peralta, Takeshi Horinouchi, Takeshi Imamura, Sanjay Limaye, Emmanuel Marcq, Masahiro Takagi, Atsushi Yamazaki, Manabu Yamada, Shigeto Watanabe, Shin-ya Murakami, Kazunori Ogohara, William M. McClintock, Gregory Holsclaw, Anthony Roman, Long-term variations of Venus’ 365-nm albedo observed by Venus Express, Akatsuki, MESSENGER, and Hubble Space Telescope. Astron. J. 158:126 (2019)
Nara, Y., Imamura, T., Masunaga, K., Lee, Y. J., Terada, N., Yoshioka, K., et al. (2020). Vertical coupling between the cloud‐level atmosphere and the thermosphere of Venus inferred from the simultaneous observations by Hisaki and Akatsuki. Journal of Geophysical Research: Planets, 125, e2019JE006192. https://doi.org/ 10.1029/2019JE006192
J. Peralta, T. Navarro, C. W. Vun, A. Sanchez-Lavega, K. McGouldrick, T. Horinouchi, T. Imamura, R. Hueso, J. P. Boyd, G. Schubert, T. Kouyama, T. Satoh, N. Iwagami, E. F. Young, M. A. Bullock, P. Machado, Y. J. Lee, S.S. Limaye, M. Nakamura, S. Tellmann, A. Wesley, and P. Miles, A long-lived sharp disruption on the lower clouds of Venus. Geophysical Research Letters, in press (2020). DOI:10.1029/2020GL087221
Wexler, D., Imamura, T., Efimov, A., Song, P., Lukanina, L., Ando, H., Jensen, E., Vierinen, J., Coster, A., Coronal electron density fluctuations inferred from Akatsuki spacecraft radio observations. Solar Phys.295, 111 (2020). https://doi.org/10.1007/s11207-020-01677-1
Kopparla, P., A. Seshadri, T. Imamura, Y.J. Lee, A Recharge Oscillator Model for Interannual Variability in Venus’ Clouds. J. Geophys. Res. 125, e2020JE006568 (2020)
J. Lee, A. García Muñoz, T. Imamura, M. Yamada, T. Satoh, A. Yamazaki, S. Watanabe, Brightness modulations of our nearest terrestrial planet Venus reveal atmospheric super-rotation rather than surface features. Nature Comm. 11, 5720 (2020).
Ando, T. Imamura, S. Tellmann, M. Pätzold, B. Häusler,N. Sugimoto, M. Takagi, H. Sagawa, S. Limaye, Y. Matsuda, R.K. Choudhary, M. Antonita, Thermal structure of the Venusian atmosphere from the sub-cloud region to the mesosphere as observed by radio occultation. Sci. Rep. 10:3448 (2020). https://doi.org/10.1038/s41598-020-59278-8
Sato, T.M., Satoh, T., Sagawa, H., Manago, N., Lee, Y.J., Murakami, S., Ogohara, K., Hashimoto, G. L., Kasaba, Y., Yamazaki, A., Yamada, M., Watanabe, S., Imamura, T., Nakamura, M. (2020), Dayside cloud top structure of venus retrieved from Akatsuki IR2 observations. Icarus, 345, 113682.
Yoshida, N., H. Nakagawa, N. Terada, J. S. Evans, N. M. Schneider, S. K. Jain, T. Imamura, J.-Y. Chaufray, H. Fujiwara, J. Deighan, and B. M. Jakosky (2020), Seasonal and latitudinal variations of dayside N2/CO2 ratio in the Martian thermosphere derived from MAVEN/IUVS observations, J. Geophys. Res. Planets, 125, https://doi.org/10.1029/2020JE006378.
Narita, M., D. Kimura and T. Imamura, Automatic Detection of Stationary Waves in the Venus Atmosphere Using Deep Generative Models, 2020 25th International Conference on Pattern Recognition (ICPR), 2912-2919, (2021). doi: 10.1109/ICPR48806.2021.941303
Ryota Mori, *Takeshi Imamura, Hiroki Ando, Bernd Häusler, Martin Pätzold, Silvia Tellmann (2012), Gravity wave packets in the Venusian atmosphere observed by radio occultation experiments: comparison with saturation theory. J. Geophys. Res., 126, e2021JE006912. https://doi.org/10.1029/2021JE006912
Barucci, M. A., et al. (31st coauthor), MIRS: an imaging spectrometer for the MMX mission. Earth Planets Space, 73, 211, 2021.
Kajiwara, N., Imamura, T., Taguchi, M., & Kouyama, T. (2021). Planetary-scale waves seen in thermal infrared images of Venusian cloud top. Journal of Geophysical Research: Planets, 126, e2021JE007047. https://doi.org/10.1029/2021JE007047
Narita, M., Imamura, T., Lee, Y. J., Watanabe, S., Yamazaki, A., Satoh, T., et al. (2022). Correlation of Venusian mesoscale cloud morphology between images acquired at various wavelengths. J. Geophys. Res., 127, e2022JE007228. https://doi.org/10.1029/2022JE007228
Kuramoto, K., et al. (9th coauthor), Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets. Earth Planets Space, 74, 12, 2022.
Ogohara, K., H. Nakagawa, S. Aoki, T. Kouyama, T. Usui, N. Terada, T. Imamura, F. Montmessin, D. Brain, A. Doressoundiram, T. Gautier, T. Hara, Y. Harada, H. Ikeda, M. Koike, F. Leblanc, R. Ramirez, E. Sawyer, K. Seki, A. Spiga, A. C. Vandaele, S. Yokota, A. Barucci, and S. Kameda (2022), The Mars system revealed by the Martian Moons eXploration mission, Earth, Planets and Space, 74, 1, https://doi.org/10.1186/s40623-021-01417-0
Chiba, S., Imamura, T., Tokumaru, M., Shiota, D., Matsumoto, T., Ando, H., Takeuchi, H., Murata, Y., Yamazaki, A., Häusler, B., Pätzold, M. (2022). Observation of the Solar Corona Using Radio Scintillation with the Akatsuki Spacecraft: Difference Between Fast and Slow Wind. Solar Physics. 297. 10.1007/s11207-022-01968-9.
H. Ando, K. Takaya, M. Takagi, N. Sugimoto, T. Imamura, H. Sagawa, S. Tellmann, M. Pätzold, Y. Matsuda, B. Häusler, S. Limaye, R. K. Choudhary, M. Antonita, Dynamical effect on static stability of the Venus atmosphere simulated using a general circulation model: a comparison with radio occultation measurements. J. Geophys. Res. 127, e2021JE006957, 2022.
Keshav R. Tripathi, R. K. Choudhary, K. M. Ambili, T. Imamura, H. Ando (2022). Characteristic features of V0 layer in the Venus ionosphere as observed by the Akatsuki orbiter: evidence for its presence during the local noon and post-sunset conditions. Geophys. Res. Lett. 49, e2022GL097824. https://doi.org/10.1029/2022GL097824
Fujisawa, Y., Murakami, Sy., Sugimoto, N. et al. The first assimilation of Akatsuki single-layer winds and its validation with Venusian atmospheric waves excited by solar heating. Sci Rep 12, 14577 (2022). https://doi.org/10.1038/s41598-022-18634-6
Fukuya, K., Imamura, T., Taguchi, M., Kouyama, T. (2022) Horizontal structures of bow-shaped mountain wave trains seen in thermal infrared images of Venusian clouds taken by Akatsuki LIR. Icarus 378 , 114936.
J. Peralta, A. Cidadão, L. Morrone, C. Foster, M. Bullock, E. F. Young. Garate-Lopez, A. Sánchez-Lavega, T. Horinouchi, T. Imamura, E. Kardasis, A. Yamazaki, and S. Watanabe, (2023). Venus cloud discontinuity in 2022. The first long-term study with uninterrupted observations. Astronomy & Astrophysics, 672, L2. https://doi.org/10.1051/0004-6361/202244822
Tripathi, K. R., Choudhary, R. K., Jose, J. S., Ambili, K. M., & Imamura, T. (2023). Gravity wave modulations at the lower altitudes of Venus ionosphere. Geophy. Res. Lett. 50, e2022GL101793. https://doi.org/10.1029/2022GL101793
Tripathi, K. R., Choudhary, R. K., Ambili, K. M., & Imamura, T. (2023). Venusian ionosphere during deep solar minima: Some new insights using Akatsuki radio science experiment. Journal of Geophysical Research: Planets, 128, e2023JE007768. https://doi.org/10.1029/2023JE007768
Yajima, N., Izutsu, N., Imamura, T., Abe, T. (2008). Scientific Ballooning – Technology and Applications of Exploration, Balloons Floating in the Stratosphere and the Atmospheres of Other Planets, Springer.
“Understanding the Diversity of Planetary Atmospheres”, François Forget, Oleg Korablev, Julia Venturini, Takeshi Imamura, Helmut Lammer, Michel Blanc, Eds., Space Sciences Series of ISSI, 81, Springer, 597pp., 2021.
報文
Noguchi, K., Imamura, T., and Oyama, K.-I. (2000). A feasibility study for observing small lunar and Martian ionospheres by radio occultation technique, ISAS Report, 678, Institute of Space and Astronautical Science, Japan,