博士, Tohoku University

Sodium Lidar Observation

measurements of Planetary Atmosphere

2004 - 2005, Colorado State University

1989, Tohoku University, Faculty of Engineering, Nuclear Engineering

1995, Tohoku University, Graduate School, Division of Natural Science, Geophysics

Mesopause temperature and wind observations by a narrowband Na lidar
T. D. Kawahara, S. Nozawa, N. Saito, T. T. Tsuda, T. Kawabata, and S. Wada
レーザセンシング学会誌 第3 巻, 3(1), 2022, Refereed, Invited
Lead

Mesopause temperature and wind observations by a narrowband Na lidar
T. D. Kawahara, S. Nozawa, N. Saito, T. T. Tsuda, T. Kawabata, and S. Wada
レーザセンシング学会誌　第3 巻, 3(1), 2022, Refereed, Invited
Lead

Formation of an additional density peak in the bottom side of the sodium layer associated with the passage of multiple mesospheric frontal systems
Lakshmi Narayanan, Viswanathan; Nozawa, Satonori; Oyama, Shin-Ichiro ; Mann, Ingrid Shiokawa, Kazuo; Otsuka, Yuichi; Saito, Norihito; Wada, Satoshi; Kawahara, Takuya D. ; Takahashi, Toru
Atmospheric Chemistry and Physics, 21(4), 2343-2361, Feb. 2021

Observation of Synchronization Between Instabilities of the Sporadic E Layer and Geomagnetic Field Line Connected F Region Medium-Scale Travelling Ionospheric Disturbances
Mitsumu K. Ejiri; Takuji Nakarnura; Takuo T. Tsuda; Takanori Nishiyama; Makoto Abo; Chiao-Yao She; Michi Nishioka; Akinori Saito; Toru Takahashi; Katsuhiko Tsuno; Takuya D. Kawahara; Takayo Ogawa; Satoshi Wada
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 124(6), 4627-4638, Jun. 2019, Not invited

On the Long Lasting "C-Type" Structures in the Sodium Lidargram: The Lifetime of Kelvin-Helmholtz Billows in the Mesosphere and Lower Thermosphere Region
Mondal, S; Sarkhel, S; Agarwal, Jay; Chakrabarty, D; Sekar, R; Yuan, Tao; Cai, Xuguang; Liu, Alan Z; Nozawa, Satonori; Saito, Norihito; Kawahara; Takuya D; Mlynczak, Martin G; Russell, James M; III
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 124(4), 3110-3124, Apr. 2019, Not invited

Vertical fine structure and time evolution of plasma irregularities in the E-s layer observed by a high-resolution Ca+ lidar
Mitsumu K. Ejiri; Takuji Nakamura; Takuo T. Tsuda; Takanori Nishiyama; Makoto Abo; Toru Takahashi; Katsuhiko Tsuno; Takuya D. Kawahara; Takayo Ogawa; Satoshi Wada
EARTH PLANETS AND SPACE, 71, -, Jan. 2019, Not invited

Responses of mesospheric sodium layer to the Geminids meteor shower activities observed with a resonance scattering lidar located in northern mid-latitude in 2007 and 2008
Ejiri; Mitsumu K; Nakamura; Takuji, Fujiwara; Yasunori, Kawahara; Takuya D
Journal of the International Meteor Organization, 47(2), 43-48, 2019

Responses of mesospheric sodium layer to the Geminids meteor shower activities observed with a resonance scattering lidar located in northern mid-latitude in 2007 and 2008
Ejiri, Mitsumu K., Nakamura, Takuji, Fujiwara, Yasunori, Kawahara, Takuya D.
Journal of the International Meteor Organization, 47(2), 43-48, 2019

On the Long Lasting "C-Type" Structures in the Sodium Lidargram: The Lifetime of Kelvin-Helmholtz Billows in the Mesosphere and Lower Thermosphere Region
Mondal, S. Sarkhel, S. ; Agarwal, Jay ; Chakrabarty, D. ; Sekar, R. ; Yuan, Tao ; Cai, Xuguang ; Liu, Alan Z. ; Nozawa, Satonori ; Saito, Norihito ; Kawahara, Takuya D. ; Mlynczak, Martin G. ; Russell, James M.
Journal of Geophysical Research: Space Physics, Volume 124(Issue 4), 3110-3124, 2019, Refereed

Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70km altitude over Syowa (69 degrees S, 40 degrees E), the Antarctic
Masaru Kogure; Takuji Nakamura; Mitsumu K. Ejiri; Takanori Nishiyama; Yoshihiro Tomikawa; Masaki Tsutsumi; Hidehiko Suzuki; Takuo T. Tsuda; Takuya D. Kawahara; Makoto Abo
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 122(15), 7869-7880, Aug. 2017, Refereed, Not invited

Depletion of mesospheric sodium during extended period of pulsating aurora
T. Takahashi; K. Hosokawa; S. Nozawa; T. T. Tsuda; Y. Ogawa; M. Tsutsumi; Y. Hiraki; H. Fujiwara; T. D. Kawahara; N. Saito; S. Wada; T. Kawabata; C. Hall
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 122(1), 1212-1220, 2017, Refereed, Not invited

Sodium temperature/wind lidar based on laser-diode-pumped Nd:YAG lasers deployed at Tromsø, Norway (696°N, 192°E)
Kawahara, T. D; Nozawa, S; Saito, N; Kawabata, T; Tsuda, T. T; Wada, S
Optics Express, 25(12), 2017, Refereed, Not invited

Sodium temperature/wind lidar based on laser-diode-pumped Nd:YAG lasers deployed at Tromsø, Norway (696°N, 192°E)
Kawahara, T. D.; Nozawa, S.; Saito, N.; Kawabata, T.; Tsuda, T. T.; Wada, S.
Optics Express, 25(12), 2017, Refereed

Depletion of mesospheric sodium during extended period of pulsating aurora
Takahashi, T.; Hosokawa, K.; Nozawa, S.; Tsuda, T. T.; Ogawa, Y.; Tsutsumi, M.; Hiraki, Y.; Fujiwara, H.; Kawahara, T. D.; Saito, N.; Wada, S.; Kawabata, T.; Hall, C.
Journal of Geophysical Research, 122(1), 1212-1220, 2017, Refereed

Rayleigh/Raman lidar observations of gravity wave activity from 15 to 70km altitude over Syowa (69 degrees S, 40 degrees E), the Antarctic
Kogure, Masaru; Nakamura, Takuji; Ejiri, Mitsumu K.; Nishiyama, Takanori; Tomikawa, Yoshihiro; Tsutsumi, Masaki; Suzuki, Hidehiko; Tsuda, Takuo T.; Kawahara, Takuya D.; Abo, Makoto;
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 122(15), 7869-7880, 2017, Refereed

A thermospheric Na layer event observed up to 140 km over Syowa Station (69.0°S, 39.6°E) in Antarctica
Tsuda, T. T; Chu, X; Nakamura, T; Ejiri, M. K; Kawahara, T. D; Yukimatu, A. S; Hosokawa, K
42(10), 3647-3653, 2015, Refereed, Not invited

A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway
Tsuda, T. T; Nozawa, S; Kawahara, T. D; Kawabata, T; Saito, N; Wada, S; Hall, C. M; Tsutsumi, M; Ogawa, Y; Oyama, S; Takahashi, T; Ejiri, M. K; Nishiyama, T; Nakamura, T; Brekke, A
Geophysical Research Letters, 42(21), 9190-9196, 2015, Refereed, Not invited

A sporadic sodium layer event detected with five-directional lidar and simultaneous wind, electron density, and electric field observation at Tromsø, Norway
Tsuda, T. T.; Nozawa, S.; Kawahara, T. D.; Kawabata, T.; Saito, N.; Wada, S.; Hall, C. M.; Tsutsumi, M.; Ogawa, Y.; Oyama, S.; Takahashi, T.; Ejiri, M. K.; Nishiyama, T.; Nakamura, T.; Brekke, A.
Geophysical Research Letters, 42(21), 9190-9196, 2015, Refereed

A thermospheric Na layer event observed up to 140 km over Syowa Station (69.0°S, 39.6°E) in Antarctica
Tsuda, T. T.; Chu, X.; Nakamura, T.; Ejiri, M. K.; Kawahara, T. D.; Yukimatu, A. S.; Hosokawa, K.
42(10), 3647-3653, 2015, Refereed

A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data
T. Takahashi; S. Nozawa; M. Tsutsumi; C. Hall; S. Suzuki; T. T. Tsuda; T. D. Kawahara; N. Saito; S. Oyama; S. Wada; T. Kawabata; H. Fujiwara; A. Brekke; A. Manson; C. Meek; R. Fujii
Annales Geophysicae, 32(10), 1195-1205, Oct. 2014, Refereed, Not invited

Variations of the neutral temperature and sodium density between 80 and 107 km above Tromsø during thewinter of 2010-2011 by a new solid-state sodium lidar.
Nozawa, S; T. D. Kawahara; N. Saito; C. M. Hall; T. T. Tsuda; T. Kawabata; S. Wada; A. Brekke; T. Takahashi; H. Fujiwara; Y. Ogawa; R. Fujii
J. Geophys. Res., 119(1), 441-451, 2014, Refereed, Not invited

A case study of gravity wave dissipation in the polar MLT region using sodium LIDAR and radar data.
Takahashi, T.,  S. Nozawa, M. Tsutsumi, C. Hall, S. Suzuki, T. T. Tsuda, T. D. Kawahara, N. Saito, S. Oyama, S. Wada, T. Kawabata, H. Fujiwara, A. A. Brekke, C. Meek, R. Fujii
Annales Geophysicae, 32(10), 1195-1205, 2014, Refereed

Variations of the neutral temperature and sodium density between 80 and 107 km above Tromsø during thewinter of 2010-2011 by a new solid-state sodium lidar.
Nozawa, S., T. D. Kawahara, N. Saito, C. M. Hall, T. T. Tsuda, T. Kawabata, S. Wada, A. Brekke, T. Takahashi, H. Fujiwara, Y. Ogawa, R. Fujii
J. Geophys. Res., 119(1), 441-451, 2014, Refereed

706 レーザーを用いた毒ガス検知手法のための信号処理法の検討(計測・制御I,学術講演)
稲垣 昌樹; 冨田 孝幸; 川原 琢也; 和田 智之;
山梨講演会講演論文集, 2013, 194-195, 26 Oct. 2013

704 北極圏観測用高出力ナトリウムライダーを用いた3次元観測(計測・制御I,学術講演)
村仲 渉; 川原 琢也; 深澤 光; 野澤 悟徳
山梨講演会講演論文集, 2013, 190-191, Oct. 2013, Not invited

705 南極レイリーラマンライダー用エタロンシステムの開発 : 気圧による光学的距離の調整(計測・制御I,学術講演)
山本 晃寛; 川原 琢也; 鈴木 秀彦; 阿保 真; 江尻 省; 中村 卓司
山梨講演会講演論文集, 2013, 192-193, Oct. 2013, Not invited

706 レーザーを用いた毒ガス検知手法のための信号処理法の検討(計測・制御I,学術講演)
稲垣 昌樹; 冨田 孝幸; 川原 琢也; 和田 智之
山梨講演会講演論文集, 2013, 194-195, Oct. 2013, Not invited

Simultaneous PMC and PMSE observations with a ground-based lidar and SuperDARN HF radar at Syowa Station, Antarctica
Suzuki, H; Nakamura, T; Ejiri, M. K; Ogawa, T; Tsutsumi, M; Abo, M; Kawahara, T. D; Tomikawa, Y; Yukimatu, A. S; Sato, N
Annales Geophysicae, 31, 1793-1803, Oct. 2013, Not invited

Decrease in sodium density observed during auroral particle precipitation over Tromsø, Norway
Tsuda, T. T; Nozawa, S; Kawahara, T. D; Kawabata, T; Saito, N; Wada, S; Ogawa, Y; Oyama, S; Hall, C. M; Tsutsumi, M; Ejiri, M. K; Suzuki, S; Takahashi, T; Nakamura, T
Geophysical Research Letters, 40, 4486-4490, Sep. 2013, Not invited

Seasonal variations of midlatitude mesospheric Na layer and their tidal period perturbations based on full diurnal cycle Na lidar observations of 2002-2008
Yuan, Tao; C.-Y. She; Takuya D. Kawahara; D. A. Krueger
Journal of Geophysical Research: Atmospheres, 117(D11), CiteID D11304, Jun. 2012, Not invited

Sodium temperature lidar based on injection seeded Nd:YAG pulse lasers using a sum-frequency generation technique
Takuya D. Kawahara; Tsukasa Kitahara; Fumitoshi Kobayashi; Yasunori Saito; Akio Nomura
OPTICS EXPRESS, 19(4), 3553-3561, Feb. 2011, Refereed, Not invited

Sodium temperature lidar based on injection seeded Nd:YAG pulse lasers using a sum-frequency generation technique
Kawahara, Takuya D.; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Saito, Yasunori; Nomura, Akio
Optics Express, 19(4), 3553-3561, 2011, Refereed

狭線幅高出力パルスナトリウムD_2線共鳴コヒーレント光源
斎藤 徳人; 月花 智博; 川原 琢也; 野澤 悟徳; 小泉 俊郎; 和田 智之
電気学会研究会資料. OQD, 光・量子デバイス研究会, 2010(1), 19-23, Feb. 2010, Not invited

Laser-induced fluorescence imaging of plants using a liquid crystal tunable filter and charge coupled device imaging camera
Y Saito; T Matsubara; T Koga; F Kobayashi; TD Kawahara; A Nomura
REVIEW OF SCIENTIFIC INSTRUMENTS, 76(10), 106103, Oct. 2005, Refereed, Not invited

Three dimensional monitoring of stack plume dynamics by a scanning Mie lidar system as a plume watchdog station
Y Saito; H Kurata; Y Hara; F Kobayashi; T Kawahara; A Nomura
OPTICAL REVIEW, 12(4), 328-333, Jul. 2005, Refereed, Not invited

Three dimensional monitoring of stack plume dynamics by a scanning Mie lidar system as a plume watchdog station
Saito, Y; Kurata, H; Hara, Y; Kobayashi, F; Kawahara, T; Nomura, A
Optical Review, 12(4), 328-333, 2005, Refereed

Laser-induced fluorescence imaging of plants using a liquid crystal tunable filter and charge coupled device imaging camera
Saito, Y. Matsubara, T. Koga, T. Kobayashi, F. Kawahara, T.D. Nomura, A.
REVIEW OF SCIENTIFIC INSTRUMENTS, 76, 106103, 2005, Refereed

Experimental discussion on eye-safe 1.54 mu m photon counting lidar using avalanche photodiode
Y Saito; H Kurata; H Kurushima; F Kobayashi; TD Kawahara; A Nomura; T Maruyama; M Tanaka
OPTICAL REVIEW, 11(6), 378-384, Nov. 2004, Refereed, Not invited

Observed temperature structure of the atmosphere above Syowa Station, Antarctica (69 degrees S, 39 degrees E)
TD Kawahara; CS Gardner; A Nomura
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 109(D12), Jun. 2004, Refereed, Not invited

Observed temperature structure of the atmosphere above Syowa Station, Antarctica (69 degrees S, 39 degrees E)
T.D.Kawahara, C.S.Gardner, A.Nomura
Journal of Geophysical Research- Atmosphere, 109(D12), 2004, Refereed

Experimental discussion on eye-safe 1.54 mu m photon counting lidar using avalanche photodiode
Saito, Y; Kurata, H; Kurushima, H; Kobayashi, F; Kawahara, TD; Nomura, A; Maruyama, T; Tanaka, M
Optical Review, 11(6), 378-384, 2004, Refereed

The first 80-hour continuous lidar campaign for simultaneous observation of mesopause region temperature and wind
CY She; J Sherman; T Yuan; BP Williams; K Arnold; TD Kawahara; T Li; LF Xu; JD Vance; P Acott; DA Krueger
GEOPHYSICAL RESEARCH LETTERS, 30(6), Mar. 2003, Refereed, Not invited

A comparison of hydroxyl rotational temperatures from Davis (69 degrees S, 78 degrees E) with sodium lidar temperatures from Syowa (69 degrees S, 39 degrees E)
GB Burns; TD Kawahara; WJR French; A Nomura; AR Klekociuk
GEOPHYSICAL RESEARCH LETTERS, 30(1), -, Jan. 2003, Refereed, Not invited

A dynamical study of the winter mid-latitude mesopause region (80-105km) based on initial simultaneous lidar measurements of temperature and winds over Fort Collins, CO (41N, 105W)
J Sherman; BP Williams; TD Kawahara; DA Krueger; CY She
MIDDLE ATMOSPHERE STRUCTURE AND DYNAMICS, 32(5), 753-758, 2003, Refereed, Not invited

The first 80-hour continuous lidar campaign for simultaneous observation of mesopause region temperature and wind,
She, C. Y., Jim Sherman, Tao Yuan, B. P. Williams, Kam Arnold, T. D.Kawahara, Tao Li, LiFang Xu, J. D. Vance, P. Acott and David A. Krueger
Geophys. Res. Lett. 30, 10.1029/2002GL016412,2003, 2003, Refereed

A comparison of hydroxyl rotational temperatures from Davis (69 degrees S, 78 degrees E) with sodium lidar temperatures from Syowa (69 degrees S, 39 degrees E)
G.B.Burns, T.D.Kawahara, W.J.R.French, A.Nomura, A.R.Klekociuk,
Geophysical Research Letters, 30(1), 2003, Refereed

A dynamical study of the winter mid-latitude mesopause region (80-105km) based on initial simultaneous lidar measurements of temperature and winds over Fort Collins, CO (41N, 105W),
James Sherman, Bifford P. Williams, T. Kawahara, D. A. Krueger, C. Y. She
Adv. Space Phys., 32, 753-758, 2003., 2003, Refereed

Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69 degrees S, 39 degrees E), Antarctica
TD Kawahara; T Kitahara; F Kobayashi; Y Saito; A Nomura; CY She; DA Krueger; M Tsutsumi
GEOPHYSICAL RESEARCH LETTERS, 29(15), Aug. 2002, Refereed, Not invited

Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69 degrees S, 39 degrees E), Antarctica
TD Kawahara; T Kitahara; F Kobayashi; Y Saito; A Nomura; CY She; DA Krueger; M Tsutsumi
GEOPHYSICAL RESEARCH LETTERS, 29(15), CiteID 1709, DOI 10.1029/2002G, Aug. 2002, Refereed, Not invited

Laser-induced fluorescence detection of plant and optimal harvest time of agricultural products (lettuce)
A Takeuchi; Y Saito; M Kanoh; TD Kawahara; A Nomura; H Ishizawa; T Matsuzawa; K Komatsu
APPLIED ENGINEERING IN AGRICULTURE, 18(3), 361-366, May 2002, Refereed, Not invited

Remote estimation of the chlorophyll concentration of living trees using laser-induced fluorescence imaging lidar
Y Saito; K Kurihara; H Takahashi; F Kobayashi; T Kawahara; A Nomura; S Takeda
OPTICAL REVIEW, 9(2), 37-39, Mar. 2002, Refereed, Not invited

Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69S, 39E), Antarctica
T.D.Kawahara, T.Kitahara, F.Kobayashi, Y.Saito, A.Nomura, M.Tsutsumi, C.-Y.She and David.A.Krueger
Geophysical Research Letters, 29(15), CiteID 1709, DOI 10.1029/2002GL015244, 2002, Refereed

Remote estimation of the chlorophyll concentration of living trees using laser-induced fluorescence imaging lidar
Saito, Y; Kurihara, K; Takahashi, H; Kobayashi, F; Kawahara, T; Nomura, A; Takeda, S
Optical Review, 9(2), 37-39, 2002, Refereed

Wintertime mesopause temperatures observed by lidar measurements over Syowa station (69 degrees S, 39 degrees E), Antarctica
Kawahara, TD; Kitahara, T; Kobayashi, F; Saito, Y; Nomura, A; She, CY; Krueger, DA; Tsutsumi, M
Geophysical Research Letters, 29(15), 2002, Refereed

Laser-induced fluorescence detection of plant and optimal harvest time of agricultural products (lettuce)
Takeuchi, A; Saito, Y; Kanoh, M; Kawahara, TD; Nomura, A; Ishizawa, H; Matsuzawa, T; Komatsu, K
Applied Engineering in Agriculture, 18(3), 361-366, 2002, Refereed

First mesopause temperature measurements by a sodium lidar in the Antarctic region
Kawahara; Takuya D; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Tsutsumi, Masaki; Saito, Yasunori; Nomura, Akio
Advances in Polar Upper Atmosphere Research, 15, 23, 2001, Refereed, Not invited

First mesopause temperature measurements by a sodium lidar in the Antarctic region
Kawahara, Takuya D.; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Tsutsumi, Masaki; Saito, Yasunori; Nomura, Akio
Advances in Polar Upper Atmosphere Research, 15, 23, 2001, Refereed

Development and performance characteristics of laser-induced fluorescence imaging lidar for forestry applications
Y Saito; R Saito; TD Kawahara; A Nomura; S Takeda
FOREST ECOLOGY AND MANAGEMENT, 128(1-2), 129-137, Mar. 2000, Refereed, Not invited

Coordinated observations of the mesopause region with radar and optical techniques
T Tsuda; T Nakamura; A Nomura; TD Kawahara; C Nagasawa; M Abo; S Okano; M Taguchi; M Ejiri
ADVANCES IN REMOTE SENSING OF THE ATMOSPHERE FROM SPACE AND FROM THE GROUND, 26(6), 907-916, 2000, Refereed, Not invited

Ultraviolet imaging spectrometer (UVS) experiment on board the NOZOMI spacecraft: Instrumentation and initial results, 共著, M.Taguchi 他4名,
Taguchi, M; Fukunishi, H; Watanabe, S; Okano, S; Takahashi, Y; Kawahara, T. D
Earth Planets Space, 52, 49-60, 2000, Refereed, Not invited

Ultraviolet imaging spectrometer (UVS) experiment on board the NOZOMI spacecraft: Instrumentation and initial results, 共著, M.Taguchi 他4名,
Taguchi, M.; Fukunishi, H.; Watanabe, S.; Okano, S.; Takahashi, Y.; Kawahara, T. D.
Earth Planets Space, 52, 49-60, 2000, Refereed

Coordinated observations of the mesopause region with radar and optical techniques
Tsuda, T; Nakamura, T; Nomura, A; Kawahara, TD; Nagasawa, C; Abo, M; Okano, S; Taguchi, M; Ejiri, M
ADVANCES IN REMOTE SENSING OFTHE ATMOSPHERE FROM SPACE AND FROM THE GROUND, 26(6), 907-916, 2000, Refereed

Development and performance characteristics of laser-induced fluorescence imaging lidar for forestry applications
Saito, Y; Saito, R; Kawahara, TD; Nomura, A; Takeda, S
Forest Ecology and Management, 128(1-2), 129-137, 2000, Refereed

Characteristics of InAlGaAs/InAlAs superlattice avalanche photodiodes for ultra-low optical power detection in the near infrared
Y Saito; T Maruyama; H Yamaki; F Kobayashi; TD Kawahara; A Nomura; L Tanaka
OPTICAL REVIEW, 6(5), 459-463, Sep. 1999, Refereed, Not invited

Performance check of vegetation fluorescence imaging lidar through in vivo and remote estimation of chlorophyll concentration inside plant leaves
Y Saito; R Saito; E Nomura; TD Kawahara; A Nomura; S Takaragaki; K Ida; S Takeda
OPTICAL REVIEW, 6(2), 155-159, Mar. 1999, Refereed, Not invited

Simultaneous measurements of dynamical structure in the mesopause region with lidars and MU radar
K Kobayashi; T Kitahara; TD Kawahara; Y Saito; A Nomura; T Nakamura; T Tsuda; M Abo; C Nagasawa; M Tsutsumi
EARTH PLANETS AND SPACE, 51(7-8), 731-739, 1999, Refereed, Not invited

Observations of mesospheric sporadic sodium layers with the MU radar and sodium lidars
H Miyagawa; T Nakamura; T Tsuda; M Abo; C Nagasawa; TD Kawahara; K Kobayashi; T Kitahara; A Nomura
EARTH PLANETS AND SPACE, 51(7-8), 785-797, 1999, Refereed, Not invited

Sodium temperature lidar system for measuring mesopause region at Syowa station, Antarctica
T. Kitahara; TD Kawahara; F. Kobayashi; Y. Saito; A. Nomura
Proceedings of International Laser Sensing Symposium (Fukui, Japan), 85-86, 1999, Refereed, Not invited

Sodium temperature lidar system for measuring mesopause region at Syowa station, Antarctica
T. Kitahara, TD Kawahara, F. Kobayashi, Y. Saito, A. Nomura
Proceedings of International Laser Sensing Symposium (Fukui, Japan), 85-86, 1999, Refereed

Observations of mesospheric sporadic sodium layers with the MU radar and sodium lidars
Miyagawa, Hirohisa; Nakamura, Takuji; Tsuda, Toshitaka; Abo, Makoto; Nagasawa, Chikao; Kawahara, Takuya D.; Kobayashi, Keiji; Kitahara, Tsukasa; Nomura, Akio
Earth Planets and Space, 51(7-8), 785-797, 1999, Refereed

Simultaneous measurements of dynamical structure in the mesopause region with lidars and MU radar
K.Kobayashi, T.Kitahara, T.D.Kawahara, Y.Saito, A.Nomura, T.Nakamura, T.Tsuda, M.Abo, C.Nagasawa,
Earth Planets and Space, 51(7-8), 731-739, 1999, Refereed

Characteristics of InAlGaAs/InAlAs superlattice avalanche photodiodes for ultra-low optical power detection in the near infrared
Saito, Y; Maruyama, T; Yamaki, H; Kobayashi, F; Kawahara, TD; Nomura, A; Tanaka, L
Optical Review, 6(5), 459-463, 1999, Refereed

Performance check of vegetation fluorescence imaging lidar through in vivo and remote estimation of chlorophyll concentration inside plant leaves
Saito, Y; Saito, R; Nomura, E; Kawahara, TD; Nomura, A; Takaragaki, S; Ida, K; Takeda, S
Optical Review, 6(2), 155-159, 1999, Refereed

Investigation of laser-induced fluorescence of several natural leaves for application to lidar vegetation monitoring
Y Saito; M Kanoh; K Hatake; TD Kawahara; A Nomura
APPLIED OPTICS, 37(3), 431-437, Jan. 1998, Refereed, Not invited

Sodium lidar system for observing Antarctic mesopause temperature over Syowa station
Kawahara; Takuya D; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Saito, Yasunori; Nomura, Akio
Proc. of the NIPR symposium, 12, 121-130, 1998, Refereed, Not invited

Sodium lidar system for observing Antarctic mesopause temperature over Syowa station
Kawahara, Takuya D.; Kitahara, Tsukasa; Kobayashi, Fumitoshi; Saito, Yasunori; Nomura, Akio
Proc. of the NIPR symposium, 12, 121-130, 1998, Refereed

Investigation of laser-induced fluorescence of several natural leaves for application to lidar vegetation monitoring
Saito, Y; Kanoh, M; Hatake, K; Kawahara, TD; Nomura, A
Applied Optics, 37(3), 431-437, 1998, Refereed

Range-resolved image detection of laser-induced fluorescence of natural trees for vegetation distribution monitoring
Y Saito; K Hatake; E Nomura; TD Kawahara; A Nomura; N Sugimoto; T Itabe
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, 36(11), 7024-7027, Nov. 1997, Refereed, Not invited

Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere
TD Kawahara; S Okano; T Abe; H Fukunishi; K Ito
APPLIED OPTICS, 36(10), 2229-2237, Apr. 1997, Refereed, Not invited

Studies of the MLT region using the MU radar and simultaneous observations with OH spectrometer and other optical instruments
T Nakamura; T Tsuda; S Fukao; H Takahashi; PP Batista; RA Buriti; M Tsutsumi; M Ishii; K Igarashi; H Fukunishi; Y Yamada; A Nomura; TD Kawahara; K Kobayashi; C Nagasawa; M Abo; MJ Taylor
MIDDLE AND UPPER ATMOSPHERES: SMALL SCALE STRUCTURES AND REMOTE SENSING, 19(4), 643-652, 1997, Refereed, Not invited

Range-resolved image detection of laser-induced fluorescence of natural trees for vegetation distribution monitoring
Saito, Y; Hatake, K; Nomura, E; Kawahara, TD; Nomura, A; Sugimoto, N; Itabe, T
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES&REVIEW PAPERS, 36(11), 7024-7027, 1997, Refereed

Studies of the MLT region using the MU radar and simultaneous observations with OH spectrometer and other optical instruments
Nakamura, T; Tsuda, T; Fukao, S; Takahashi, H; Batista, PP; Buriti, RA; Tsutsumi, M; Ishii, M; Igarashi, K; Fukunishi, H; Yamada, Y; Nomura, A; Kawahara, TD; Kobayashi, K; Nagasawa, C; Abo, M; Taylor, MJ
Earth, Planets and Space, 19(4), 643-652, 1997, Refereed

Glass-type hydrogen and deuterium absorption cells developed for D/H ratio measurements in the Martian atmosphere
Kawahara, TD; Okano, S; Abe, T; Fukunishi, H; Ito, K
Applied Optics, 36(10), 2229-2237, 1997, Refereed

Range-resolved bistatic imaging lidar for the measurement of the lower atmosphere
K Meki; K Yamaguchi; Li, X; Y Saito; TD Kawahara; A Nomura
OPTICS LETTERS, 21(17), 1318-1320, Sep. 1996, Refereed, Not invited

Range-resolved bistatic imaging lidar for the measurement of the lower atmosphere
Meki, K; Yamaguchi, K; Li, X; Saito, Y; Kawahara, TD; Nomura, A
Optics Letters, 21(17), 1318-1320, 1996, Refereed

昭和基地で観測されたCa+層とスポラディックE層の比較
江尻 省, 西山尚典, 津田卓雄, 津野克彦, 古城侑季, 齊藤昭則, 西岡未知, 阿保 真, 川原琢也, 小川貴代, 和田智之, 中村卓司
地球電磁気･地球惑星圏学会第154回 総会・講演会, 2025

Development of the time-delayed multi-beam observation method applied to the Tromsø Na lidar
K. Sato, T. T. Tsuda, S. Karigane, T. Aoki, N. Saito, S. Nozawa, T. Kawabata, T. D. Kawahara, and T. Takahashi
地球電磁気・地球惑星圏学会 2024 年秋季年会, Nov. 2024

Sporadic Ca+ layer observed at 100-170 km over Syowa during geomagnetic quiet condition
M. K. Ejiri, T. Nishiyama, T. T. Tsuda, K. Tsuno, Y. Kojo, A. Saito, M. Nishioka, M. Abo, T. D. Kawahara, T. Ogawa, S. Wada, and T. Nakamura
地球電磁気・地球惑星圏学会 2024 年秋季年会, Nov. 2024

Investigation on K variations during wintertime observed at Syowa Station, Antarctic
J. Hu, T. T. Tsuda, M. K. Ejiri, T. Nishiyama, T. Nakamura, K. Tsuno, M. Abo, T. Kawahara, T. Ogawa, and S. Wada
地球電磁気・地球惑星圏学会 2024 年秋季年会, Nov. 2024

昭和基地共鳴散乱ライダーで観測された地磁気静穏時のスポラディック Ca+ 層
江尻省, 西山尚典, 津田卓雄, 津野克彦, 古城侑季, 齊藤昭則, 西岡未知, 中村卓司, 阿保真, 川原琢也, 小川貴代, 和田智之
第42回 レーザセンシングシンポジウム, Sep. 2024

トロムソ Na ライダーに適用する時間差マルチビーム観測方式の開発
佐藤洸太, 津田卓雄, 雁金沙弥香, 青木猛, 斎藤徳人, 野澤悟徳, 川端哲也, 川原琢也, 高橋透
合同研究集会 (STE 現象報告会, MTI 研究集会, 超小型衛星を利用した超高層大気研究の将来ミッションの検討, 太陽地球環境データ解析に基づく超高層大気の空間・時間変動の解明 ~ IUGONET プロジェクト 15 年の歩みとその将来 ~), Sep. 2024

Simultaneous observation of sporadic E and metal ion layers in the auroral zone
M. K. Ejiri, T. Nishiyama, T. T. Tsuda, K. Tsuno, Y. Kojo, A. Saito, M. Nishioka, M. Abo, T. Kawahara, T. Ogawa, S. Wada, and T. Nakamura
SCAR 2024, Aug. 2024, Invited

Observation of vertical transportation in the lower thermosphere using Ca+ lidar measurements
M. K. Ejiri, T. Nishiyama, T. T. Tsuda, K. Tsuno, Y. Kojo, A. Saito, M. Nishioka, M. Katsuragawa, A. Hashimoto, S. Kobayashi, S. Miyoshi, M. Abo, T. Kawahara, T. Ogawa, S. Wada, and T. Nakamura
VCAIS/ANGWIN 2024 Workshop, Jun. 2024

D-region ion line: the influence of charged dust on incoherent scatter
Ingrid Brigitte Mann, Tinna Lif Gunnarsdottir, Devin R. Huyghebaert, Isabel M. Nerland, Wuhu Feng, John M.C. Plane, Yasunobu Ogawa, Ingemar Haeggstroem, Satonori Nozawa, Norihito Saito, Takuya D. Kawahara, Neethal Thomas
JpGU Meeting 2024, May 2024

Comparison between Ca+ layer and sporadic E layer over Syowa Station, Antarctic
M. K. Ejiri, T. Nishiyama, T. T. Tsuda, K. Tsuno, Y. Kojo, A. Saito, M. Nishioka, T. Nakamura, M. Abo, T. D. Kawahara, T. Ogawa, S. Wada
The 14th Symposium on Polar Science, 14 Nov. 2023

トロムソ Na 共鳴散乱ライダーに適用する時間差マルチビーム手法の構築
雁金沙弥香, 津田卓雄, 青木猛, 渡部蓮, 佐藤洸太, 斎藤徳人, 野澤悟徳, 川端哲也, 川原琢也
合同研究集会 (STE 現象報告会, MTI 研究集会, 宇宙空間からの地球超高層大気観測に関する研究会, 太陽地球系物理学分野のデータ解析手法、ツールの理解と応用), 07 Nov. 2023

トロムソ Na ライダーの改良に向けた FPGA 制御・計測システムの開発
渡部蓮, 津田卓雄, 青木猛, 雁金沙弥香, 佐藤洸太, 野澤悟徳, 川端哲也, 斎藤徳人, 川原琢也
第41回レーザセンシングシンポジウム, 06 Sep. 2023

Ca+ ion layer observed by a resonance scattering lidar at Syowa in the Antarctic
M. K. Ejiri, T. Nishiyama, T. T. Tsuda, M. Tsutsumi, K. Tsuno, M. Abo, T. D. Kawahara, T. Ogawa, S. Wada, T. Nakamura
IUGG 2023, 2023

Naライダーの昼間観測に用いるFaraday filterの透過率詳細測定
川原琢也, 野澤悟徳, 斎藤徳人, 津田卓雄, 高橋 透, 川端哲也, 和田智之, 小林啓悟, 野村俊介
地球電磁気･地球惑星圏学会第154回 総会・講演会, 2023

A self-build FPGA-based data acquisition system for an upgrade of the Tromsoe sodium lidar
渡部 蓮, 津田卓雄, 青木 猛, 雁金 沙弥香, 野澤悟徳, 川端哲也, 斎藤徳人, 川原琢也
地球電磁気･地球惑星圏学会第154回 総会・講演会, 2023

Polarizing properties of sapphire and gadolinium-gallium garnet cells used in Na Faraday anomalous dispersion optical filter
坂元希優，津田卓雄，川原琢也，野澤悟徳，川端哲也，斎藤徳人
Japan Geoscience Union Meeting 2023, 2023

Development of a self-build FPGA-based data acquisition system for the Tromsø sodium lidar and its test observation
渡部 蓮，津田卓雄，青木 猛，野澤悟徳，川端哲也，斎藤徳人，川原琢也
Japan Geoscience Union Meeting 2023, 2023

Investigation on seasonal variation in potassium layer over Syowa station (69.0°S, 39.6°E), Antarctic
胡 錦怡，津田卓雄，稀代崚雅，江尻 省，西山尚典，中村卓司，津野克彦，阿保 真，川原琢也，小川貴代，和田智之
Japan Geoscience Union Meeting 2023, 2023

Development of a narrow-band optical filter for daytime/thermospheric observations with a Na lidar at Tromsoe (2)
川原琢也，小林啓悟，野村俊介，野澤悟徳，斎藤徳人，津田卓雄，和田智之，高橋 透
Japan Geoscience Union Meeting 2023, 2023

昭和基地で観測された中間圏 カルシウムイオン層の挙動
江尻 省, 西山尚典, 津田卓雄, 堤 雅基, 阿保 真, 津野克彦, 川原琢也, 小川貴代, 和田智之, 中村卓司
第150回SGEPSS総会および講演会, 01 Nov. 2021

Atmospheric instabilities in the polar upper mesosphere (2)
野澤悟徳, 川原琢也, 斎藤徳人, 和田智之, 津田卓雄, 川端哲也, Hall Chris
第150回SGEPSS総会および講演会, 31 Oct. 2021

Vertical profiles of atmospheric temperature between upper troposphere and mesosphere obtained from Rayleigh/Raman lidar installed at Syowa station in Antarctica.
Nishiyama, Takanori, Takuji Nakamura, Masaki Tsutsumi, Takuya D. Kawahara, Yoshihiro Tomikawa, Hidehiko Suzuki, Mitsumu K. Ejiri,  Makoto Abo, Takuo T. Tsuda
40th COSPAR Scientific Assembly, 02 Aug. 2014

Mesospheric potassium layer observation by a frequency-tunable resonance scattering lidar system.
Ejiri, Mitsumu K., Takuji Nakamura, Takuya D. Kawahara, Makoto Abo, Takanori Nishiyama, Takuo T. Tsuda
40th COSPAR Scientific Assembly, 02 Aug. 2014

Mesospheric potassium layer observation by a frequency-tunable resonance scattering lidar system.
Ejiri; Mitsumu K; Takuji Nakamura; Takuya D. Kawahara; Makoto Abo; Takanori Nishiyama; Takuo T. Tsuda
40th COSPAR Scientific Assembly, Aug. 2014, Not invited

Vertical profiles of atmospheric temperature between upper troposphere and mesosphere obtained from Rayleigh/Raman lidar installed at Syowa station in Antarctica.
Nishiyama, Takanori; Takuji Nakamura; Masaki Tsutsumi; Takuya D. Kawahara; Yoshihiro Tomikawa; Hidehiko Suzuki; Mitsumu K. Ejiri; Makoto Abo; Takuo T. Tsuda
40th COSPAR Scientific Assembly, Aug. 2014, Not invited

Variations of the neutral temperature inside an SSL during a night of high auroral activity above Tromsø
Takahashi, T., Nozawa, S., Tsuda, T. T., Oyama, S., Fujiwara, H., Tsutsumi, M., Kawahara, T., Saito, N., Wada, S., Kawabata, T., Matuura, N., Hall, C. M.
American Geophysical Union, Fall Meeting 2013, 10 Dec. 2013

Variations of the neutral temperature inside an SSL during a night of high auroral activity above Tromsø
Takahashi, T; Nozawa, S; Tsuda, T. T; Oyama, S; Fujiwara, H; Tsutsumi, M; Kawahara, T; Saito, N; Wada, S; Kawabata, T; Matuura, N; Hall, C. M
American Geophysical Union, Fall Meeting 2013, Dec. 2013, Not invited

All solid state, high power (4 W) sodium temperature/wind lidar deployed at EISCATradar site, Norway (69.6ºN, 19.2ºE)
Kawahara, T., S. Nozawa, N. Saito, T. Tsuda, S. Wada, T. Kawabata
International CAWSES-II Symposium, 23 Nov. 2013

Thermospheric sodium layer observed at Syowa Station, Antarctica
Tsuda, T. T., X. Chu, T. Nakamura, M. K. Ejiri, T. D. Kawahara
International CAWSES-II Symposium, 18 Nov. 2013

Variations of neutral temperature and winds in the polar mesosphere and lower thermosphere above Tromsø
Nozawa, S., T. D. Kawahara, T. Tsuda, N. Saito, M. Tsutsumi, S. Wada, H. Fujiwara, T.Takahashi, T. Kawabata, Y. Ogawa, S. Oyama, C. Hall, A. Brekke, and R. Fujii
International CAWSES-II Symposium, Nagoya University, 18 Nov. 2013

A new tunable resonance scattering lidar for upper atmospheric measurements at Syowa Station: Preliminary observations in Japan
Ejiri, M. K., T. T. Tsuda, T. Nishiyama, M. Abo, T. D. Kawahara, T. Nakamura
International CAWSES-II Symposium, 18 Nov. 2013

All solid state, high power (4 W) sodium temperature/wind lidar deployed at EISCATradar site, Norway (69.6ºN, 19.2ºE)
Kawahara, T; S. Nozawa; N. Saito; T. Tsuda; S. Wada; T. Kawabata
International CAWSES-II Symposium, Nov. 2013, Not invited

A new tunable resonance scattering lidar for upper atmospheric measurements at Syowa Station: Preliminary observations in Japan
Ejiri, M. K; T. T. Tsuda; T. Nishiyama; M. Abo; T. D. Kawahara; T. Nakamura
International CAWSES-II Symposium, Nov. 2013, Not invited

Variations of neutral temperature and winds in the polar mesosphere and lower thermosphere above Tromsø
Nozawa, S; T. D. Kawahara; T. Tsuda; N. Saito; M. Tsutsumi; S. Wada; H. Fujiwara; T.Takahashi; T. Kawabata; Y. Ogawa; S. Oyama; C. Hall; A. Brekke; R. Fujii
International CAWSES-II Symposium, Nagoya University, Nov. 2013, Not invited

Thermospheric sodium layer observed at Syowa Station, Antarctica
Tsuda, T. T; X. Chu; T. Nakamura; M. K. Ejiri; T. D. Kawahara
International CAWSES-II Symposium, Nov. 2013, Not invited

物理学実験A, B, C
Shinshu University

波動と光
Shinshu University

物理工学特論I
Shinshu University

電磁気学
Shinshu University

American Geophysical Union

Apr. 1990
地球電磁気・地球惑星圏学会

Dec. 2010
レーザー学会

光学的手法を用いた観測器の開発と観測