HIROSHI KIKUCHI
| Center for Space Science and Radio Engineering | Associate Professor |
| Department of Computer and Network Engineering | Associate Professor |
| Cluster II (Emerging Multi-interdisciplinary Engineering) | Associate Professor |
Researcher Information
Field Of Study
Career
- Nov. 2023 - Present
The University of Electro Communications, Center for Space Science and Radio Engineering, 准教授 - Nov. 2018 - Oct. 2023
The University of Electro-Communications, Center for Space Science and Radio Engineering, 助教 - 01 Apr. 2017 - 31 Oct. 2018
首都大学東京システムデザイン学部航空宇宙システム工学コース特任助教 - 01 Apr. 2013 - 31 Mar. 2017
大阪大学大学院工学研究科特任研究員 - 01 Apr. 2011 - 31 Mar. 2013
日本学術振興会特別研究員(DC2) - 01 Apr. 2010 - 31 Mar. 2013
大阪工業大学工学部非常勤講師
Educational Background
Member History
- Apr. 2023 - Present
プログラム委員, 日本地球惑星科学連合2024年 - Apr. 2023 - Present
The Technical Program Committee, EMC Japan/APEMC Okinawa 2024, Society - Apr. 2022 - Present
文科省科学技術専門家ネットワーク令和4年度専門調査員 - Apr. 2021 - Present
第27,28期運営委員, 日本大気電気学会, Society - Apr. 2019 - Mar. 2022
副査, 次世代高機能気象レーダーの導入による周波数の有効利用のための技術的条件に関する調査検討会(X帯・C帯)
Research Activity Information
Award
Paper
- Ground-clutter Mitigation by Digital Beamforming with Precomputed Weighting Matrix for Phased Array Weather Radar
Y. Wada; Y. Takata; H. Kikuchi; D. Kitahara; E. Yoshikawa; T. Ushio
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (Accepted), Apr. 2024, Peer-reviwed
Scientific journal, English - 気象用二重偏波フェーズドアレイレーダとCNN及びLSTMを用いた豪雨検知手法
後藤翼; 菊池博史; 芳原容英; 牛尾知雄
電気学会論文誌A（基礎・材料・共通部門誌）(accepted), Apr. 2024, Peer-reviwed - Convex Estimation of Sparse-Smooth Power Spectral Densities from Mixtures of Realizations with Application to Weather Radar
H. Kuroda, D, Kitahara, E. Yoshikawa, H. Kikuchi, T. Ushio
IEEE Access, 11, 128859-128874, Dec. 2023, Peer-reviwed
Scientific journal, English - 気象用二重フェーズドアレイ気象レーダとLF帯雷放電装置を用いた雲内粒子と放電過程の時系列変化
鹿倉周太郎; 菊池博史; 芳原容英; 吉川英一; 中村佳敬; 森本健志; 牛尾知雄
Journal of Atmospheric Electricity Letters (accepted), Dec. 2023, Peer-reviwed - Total Lightning Distribution and Heavy Rainfall Characteristics Associated with Multicellular Thunderstorms
D. Mondal; Y. Hobara; H. Kikuchi; J. Lapierre
URSI Radio Science Bulletin, 2021, 378, 70-77, Oct. 2023, Peer-reviwed - Sparsity-Smoothness-Aware Power Spectral Density Estimation with Application to Phased Array Weather Radar
Hiroki Kuroda; Daichi Kitahara; Eiichi Yoshikawa; Hiroshi Kikuchi; Tomoo Ushio
ICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), IEEE, 04 Jun. 2023
International conference proceedings - On the Spatio-Temporal Dependence of Anomalies in the Atmospheric Electric Field Just around the Time of Earthquakes
Y. Hobara; M. Watanabe; R. Miyajima; H. Kikuchi; T. Tsuda; M. Hayakawa
Atmosphere, 13(10), 1619, Oct. 2022, Peer-reviwed
Scientific journal, English - Lightning Bubbles Caused by Upward Reflectivity Pulses above Precipitation Cores of a Thundercloud
Y. Moroda; K. Tsuboki; S. Satoh; K. Nakagawa; T. Ushio; H. Kikuchi
The Scientific Online Letters on the Atmosphere (SOLA), 18, 1-10, Jun. 2022, Peer-reviwed
Scientific journal, English - Application of Comb Beam Transmission to C-band Phased Array Weather Radar
Eiichi Yoshikawa; Tomoo Ushio; Hiroshi Kikuchi
2022 IEEE RADAR CONFERENCE (RADARCONF'22), IEEE, May 2022, Peer-reviwed
International conference proceedings, English - Nonlinear Beamforming Based on Group-Sparsities of Periodograms for Phased Array Weather Radar
D. Kitahara; H. Kuroda; A. Hirabayashi; E. Yoshikawa; H. Kikuchi; T. Ushio
IEEE Transactions on Geoscience and Remote Sensing, Institute of Electrical and Electronics Engineers (IEEE), 1, 1, 1-11, Feb. 2022, Peer-reviwed
Scientific journal, English - Compressive Sensing to Reduce the Number of Elements in a Linear Antenna Array with a Phased Array Weather Radar
H. Kikuchi; Y. Hobara; T. Ushio
IEEE Transactions on Geoscience and Remote Sensing, 1, 1, 1-10, Feb. 2022, Peer-reviwed
Scientific journal, English - Improving precipitation nowcasting using a three-dimensional convolutional neural network model from Multi Parameter Phased Array Weather Radar observations
D. K. Kim; T. Suezawa; T. Mega; H. Kikuchi; E. Yoshikawa; P. Baron; T. Ushio
Atmospheric Research, Elsevier BV, 262, 1-8, Nov. 2021, Peer-reviwed
Scientific journal, English - Validation of X-band multi-parameter phased array weather radar by comparing data from Doppler weather radar with a parabolic dish antenna
K. Asai; H. Kikuchi; Y. Hobara; T. Ushio
Journal of Atmospheric and Oceanic Technology, 1-10, Sep. 2021, Peer-reviwed
Scientific journal, English - A Study of Comb Beam Transmission on Phased Array Weather Radars
Eiichi Yoshikawa; Tomoo Ushio; Hiroshi Kikuchi
IEEE Transactions on Geoscience and Remote Sensing, 59, 8, 6346-6356, Aug. 2021
Scientific journal - Adaptive Beamforming Using Steering Vector Correction for Phased-Array Weather Radar
Hiroshi Kikuchi; Eiichi Yoshikawa; Tomoo Ushio; Yasuhide Hobara
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Institute of Electrical and Electronics Engineers (IEEE), 14, 8419-8426, Aug. 2021
Scientific journal - Clutter reduction for Phased-Array Weather Radar using Diagonal Capon Beamforming with Neural Networks
H. Kikuchi; E. Yoshikawa; T. Ushio; Y. Hobara
Lead, IEEE Geoscience and Remote Sensing Letters, 17, 12, 2065-2069, Dec. 2020, Peer-reviwed
Scientific journal - A Study of Comb Beam Transmission on Phased Array Weather Radars
E. Yoshikawa; T. Ushio; H. Kikuchi
IEEE Transactions on Geoscience and Remote Sensing, 1, 1, 1-8, Oct. 2020, Peer-reviwed
Scientific journal, English - Development and Observations of the Phased Array Radar for Weather Application
Tomoo Ushio; Eiichi Yoshikawa; Hiroshi Kikuchi; Masakazu Wada
IEEE National Radar Conference - Proceedings, 2020-September, 21 Sep. 2020
International conference proceedings - Initial Observations for Precipitation Cores with X-Band Dual Polarized Phased Array Weather Radar
Hiroshi Kikuchi; Taku Suezawa; Tomoo Ushio; Nobuhiro Takahashi; Hiroshi Hanado; Katsuhiro Nakagawa; Masahiko Osada; Tsuyoshi Maesaka; Koyuru Iwanami; Kazuhiro Yoshimi; Fumihiko Mizutani; Masakazu Wada; Yasuhide Hobara
IEEE Transactions on Geoscience and Remote Sensing, 58, 5, 3657-3666, May 2020, Peer-reviwed
Scientific journal, English - An Estimator for Weather Radar Doppler Power Spectrum via Minimum Mean Square Error
E. Yoshikawa; N. Takizawa; H. Kikuchi; T. Mega; T. Ushio
IEEE Transactions on Geoscience and Remote Sensing, 60, 1-8, Jan. 2020, Peer-reviwed
Scientific journal, English - Three-dimensional data compression and fast high-quality reconstruction for phased array weather radar
Ryosuke Kawami; Daichi Kitahara; Akira Hirabayashi; Eiichi Yoshikawa; Hiroshi Kikuchi; Tomoo Ushio
IEEJ Transactions on Electronics, Information and Systems, 140, 1, 40-48, 2020, Peer-reviwed
Scientific journal, English - Improving the accuracy of rain rate estimates using X-band phased-array weather radar network
Hiroshi Kikuchi; Tomoo Ushio; Fumihiko Mizutani; Masakazu Wada
IEEE Transactions on Geoscience and Remote Sensing, 56, 12, 6986-6994, Dec. 2018, Peer-reviwed
Scientific journal, English - Fast-Scanning Phased-Array Weather Radar with Angular Imaging Technique
Fumihiko Mizutani; Tomoo Ushio; Eiichi Yoshikawa; Shigeharu Shimamura; Hiroshi Kikuchi; Masakazu Wada; Shinsuke Satoh; Toshio Iguchi
IEEE Transactions on Geoscience and Remote Sensing, 56, 5, 2664-2673, May 2018, Peer-reviwed
Scientific journal, English - Adaptive Pulse Compression Technique for X-Band Phased Array Weather Radar
H. Kikuchi; E. Yoshikawa; T. Ushio; F. Mizutani; M. Wada
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 14, 10, 1810-1814, Oct. 2017, Peer-reviwed
Scientific journal, English - Identification of sprites in JEM-GLIMS nadir observations and their spatial distributions
M. Sato; T. Adachi; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; M. Suzuki; A. Yamazaki; Y. Takahashi; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara
Terrestrial, Atmospheric and Oceanic Sciences, 28, 4, 864-870, Aug. 2017, Peer-reviwed
Scientific journal, English - Application of Adaptive Digital Beamforming to Osaka University Phased Array Weather Radar
Hiroshi Kikuchi; Eiichi Yoshikawa; Tomoo Ushio; Fumihiko Mizutani; Masakazu Wada
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 55, 7, 3875-3884, Jul. 2017, Peer-reviwed
Scientific journal, English - Performance of Minimum Mean-Square Error Beam Forming for Polarimetric Phased Array Weather Radar
Hiroshi Kikuchi; Ting Wu; Eiichi Yoshikawa; Tomoo Ushio; Hideto Goto; Fumihiko Mizutani; Masakazu Wada; V. Chandrasekar
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 55, 5, 2757-2770, May 2017, Peer-reviwed
Scientific journal, English - Application of digital beamforming method for a network of lightning location sensors
Kikuchi Hiroshi; Wu Ting; Ushio Tomoo; Yoshida Satoru; Kawasaki Zen
Journal of Atmospheric Electricity, Society of Atmospheric Electricity of Japan, 36, 2, 55-67, 2017
English - Simultaneous observations of optical lightning from space and LF band lightning waveforms from the ground
Hiroshi Kikuchi; Mitsuteru Sato; Tomoo Ushio; Takeshi Morimoto; Masayuki Kikuchi; Atsushi Yamazaki; Makoto Suzuki; Ryohei Ishida; Yuji Sakamoto; Ting Wu; Zen Kawasaki
GEOPHYSICAL RESEARCH LETTERS, AMER GEOPHYSICAL UNION, 44, 2, 1123-1131, Jan. 2017, Peer-reviwed
Scientific journal, English - Simple compression technique for phased array weather radar and 2-dimensional high-quality reconstruction
Ryosuke Kawami; Akira Hirabayashi; Nobuyuki Tanaka; Takashi Ijiri; Shigeharu Shimamura; Hiroshi Kikuchi; Gwan Kim; Tomoo Ushio
IEEJ Transactions on Electronics, Information and Systems, 137, 7, 864-870, 2017, Peer-reviwed
Scientific journal, English - LF帯センサネットワークを用いた雷放電位置標定におけるビームフォーマ法の適用
菊池博史; Wu Ting; 牛尾知雄; 吉田智; 河崎善一郎
Journal of Atmospheric Electricity, 36, 55-67, 2017, Peer-reviwed
Scientific journal, Japanese - Lightning observations of a small satellite “Maido-1”
T. Morimoto; H. Kikuchi; S. Yoshida; T. Ushio; Z.-I. Kawasaki
Journal of Atmospheric Electricity, Society of Atmospheric Electricity of Japan, 36, 2, 39-83, 2017, Peer-reviwed
Scientific journal, English - Large-Volume Data Compression Using Compressed Sensing for Meteorological Radar
Shigeharu Shimamura; Hiroshi Kikuchi; Takahiro Matsuda; Gwan Kim; Eiichi Yoshikawa; Yoshitaka Nakamura; Tomoo Ushio
ELECTRONICS AND COMMUNICATIONS IN JAPAN, WILEY-BLACKWELL, 99, 10, 103-111, Oct. 2016, Peer-reviwed, In Japan, severe weather phenomena such as heavy rains and tornados sometimes cause meteorological disasters. In many cases, these are micro scale phenomena in the sense of spatial and temporal resolutions, which make it difficult to detect them with conventional meteorological radars due to their insufficient spatial and temporal resolutions. Therefore, we have been developing meteorological radars with high resolution and accuracy such as phased array radar (PAR) and Ku-band broad band radar (BBR), and radar network systems consisting of multiple PARs and BBRs to realize further enhancement of the radar performance in terms of efficiency and accuracy. These high-resolution radars, however, definitely produce large-volume data, which is unacceptable in a current backbone information network. In order to solve this problem, in this paper, we tackle the compression of the large-volume radar data by using Compressed sensing (CS), which can realize highly efficient data compression for sparse signals. When using CS, the radar data are compressed by projecting it onto a randomly generated subspace, and the compressed data are reconstructed by solving a simple.. 1 optimization problem. We apply the CS-based data compression scheme to measured radar reflectivity factor, and evaluate the relation between compression ratio and reconstruction accuracy. For the compression ratio of 0.3, rainfall rate calculated from the reconstructed radar reflectivity factor has a mean error of -0.89 mm/h with more than 30 dBZ precipitation. (C) 2016 Wiley Periodicals, Inc. Published online in Wiley Online Library (wileyonlinelibrary.com).
Scientific journal, English - An overview of VHF lightning observations by digital interferometry from ISS/JEM-GLIMS
Takeshi Morimoto; Hiroshi Kikuchi; Mitsuteru Sato; Tomoo Ushio; Atsushi Yamazaki; Makoto Suzuki; Ryohei Ishida; Yuji Sakamoto; Kazuya Yoshida; Yasuhide Hobara; Takuki Sano; Takumi Abe; Zen-Ichiro Kawasaki
EARTH PLANETS AND SPACE, SPRINGER HEIDELBERG, 68, 1, 145, Aug. 2016, Peer-reviwed, © 2016 The Author(s). The Global Lightning and sprIte MeasurementS (GLIMS) mission has been conducted at the Exposed Facility of Japanese Experiment Module (JEM-EF) of the International Space Station for more than 30 months. This paper focuses on an electromagnetic (EM) payload of JEM-GLIMS mission, the very high frequency (VHF) broadband digital InTerFerometer (VITF). The JEM-GLIMS mission is designed to conduct comprehensive observations with both EM and optical payloads for lightning activities and related transient luminous events. Its nominal operation continued from November 2012 to December 2014. The extended operation followed for eight months. Through the operation period, the VITF collected more than two million VHF EM waveforms in almost 18,700 datasets. The number of VITF observations synchronized with optical signal is 8049. Active VHF radiations are detected in about 70 % of optical observations without obvious regional or seasonal dependency. Estimations of the EM direction-of-arrival (DOA) are attempted using the broadband digital interferometry. Some results agree with the optical observations, even though DOA estimation is problematic because of a very short antenna baseline and multiple pulses over a short time period, namely burst-type EM waveforms. The world's first lightning observations by means of space-borne VHF interferometry are achieved in this mission. This paper summarizes VITF instruments, the recorded VHF EM signals, and the results of DOA estimations by means of digital interferometry as a preliminary report after termination of the mission.
English - Direction-of-Arrival Estimation of VHF Signals Recorded on the International Space Station and Simultaneous Observations of Optical Lightning
Hiroshi Kikuchi; Takeshi Morimoto; Mitsuteru Sato; Tomoo Ushio; Masayuki Kikuchi; Atsushi Yamazaki; Makoto Suzuki; Ryohei Ishida; Yuji Sakamoto; Zen Kawasaki
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 54, 7, 3868-3877, Jul. 2016, Peer-reviwed, We report an initial investigation of the new location method of a very high frequency (VHF) radiation source, using signals recorded at the International Space Station. A VHF interferometer (VITF) has two VHF sensors. Locating lightning with VHF bands is useful to locate the position of the charge distribution in the thunderstorm. The location method of a radio source proposed used two direction-of-arrival estimation techniques. One is the interferometric technique, and another is based on the ionospheric propagation delay measurement of received signals. The combination of the two techniques provides two angular positions of the radiation source. When an altitude of a radiation source is assumed, we can determine two possible positions. One of the two positions was associated with the radiation source, while the other was not. In this paper, we compared the position of lightning and sprite imager (LSI) data, which are simultaneously captured during a lightning emission, with the locating position near the emission. The data set of the VITF within 100 ms of the optical lightning emission captured with the LSI was used. The temporally simultaneous event seems to be associated with the same lightning event. The estimated radiation positions were spatially in close agreement with the optical lightning positions captured with LSI, under nighttime ionosphere conditions. From statistical analysis, the spatial difference of the standard deviation changed from 15.3 to 30.8 km depending on the installation direction of the VHF sensors. The usefulness and limitations of the method are also discussed.
Scientific journal, English - Horizontal distributions of sprites derived from the JEM-GLIMS nadir observations
M. Sato; M. Mihara; T. Adachi; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; M. Suzuki; A. Yamazaki; Y. Takahashi; U. Inan; I. Linscott; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, AMER GEOPHYSICAL UNION, 121, 7, 3171-3194, Apr. 2016, Peer-reviwed, Global Lightning and Sprite Measurements on Japanese Experiment Module (JEM-GLIMS) started the nadir observations of lightning discharges and transient luminous events (TLEs) from the International Space Station (ISS) since November 2012. In the nadir observations, JEM-GLIMS optical instruments have to simultaneously detect incomparably intense lightning emissions and weak TLE emissions. To distinguish TLEs, especially sprite events, from lightning events, combined data analytical methods are adopted: (1) a subtraction of the wideband camera image from the narrowband camera image, (2) a calculation of the intensity ratio between different photometer channels, and (3) an estimation of the polarization and charge moment changes for the TLE-producing lightning discharges. We succeeded in identifying numbers of sprite events using the combined analytical methods, and here we report three sprite events detected by JEM-GLIMS as a case study. In the subtracted images, sprite emissions are located over the area of the sprite-producing lightning emissions. However, these sprites and sprite-producing lightning discharges did not occur at the nadir point of the ISS. For this reason, the geometry conversion of the sprite and sprite-producing lightning emissions as observed from the point just over the sprite-producing lightning discharges is performed. In the geometry-converted images, the locations of the sprite emissions are clearly displaced by 8-20km from the peak positions of the sprite-producing lightning emissions. Thus, the first quantitative spatial distributions of sprites and sprite-producing lightning discharges from the JEM-GLIMS nadir observations are revealed.
Scientific journal, English - Large-volume data compression using compressed sensing for meteorological radar
Shigeharu Shimamura; Hiroshi Kikuchi; Takahiro Matsuda; Gwan Kim; Eiichi Yoshikawa; Yoshitaka Nakamura; Tomoo Ushio
IEEJ Transactions on Fundamentals and Materials, 135, 11, 704-710, 01 Nov. 2015, Peer-reviwed, Copyright © 2015 The Institute of Electrical Engineers of Japan. In Japan, severe weather phenomena such as heavy rains and tornados sometimes cause meteorological disasters. In many cases, these are micro scale phenomena in the sense of spatial and temporal resolutions, which make it difficult to detect them with conventional meteorological radars due to their insufficient spatial and temporal resolutions. Therefore, we have been developing meteorological radars with high resolution and accuracy such as phased array radar (PAR) and Ku-band broadband radar (BBR), and radar network systems consisting of multiple PARs and BBRs to realize further enhancement of the radar performance in terms of efficiency and accuracy. These high-resolution radars, however, definitely produce large-volume data, which is unacceptable in a current backbone information network. In order to solve this problem, in this paper, we tackle the compression of the large-volume radar data by using Compressed sensing (CS), which can realize highly efficient data compression for sparse signals. When using CS, the radar data is compressed by projecting it onto a randomly generated subspace, and the compressed data is reconstructed by solving a simple ℓ1 optimization problem. We apply the CS-based data compression scheme to measured radar reflectivity factor, and evaluate the relation between compression ratio and reconstruction accuracy. For the compression ratio of 0.3, rainfall rate calculated from the reconstructed radar reflectivity factor has a mean error of - 0.89 mm/h with more than 30 dBZ precipitation.
Scientific journal - Overview and early results of the Global Lightning and Sprite Measurements mission
M. Sato; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; T. Adachi; M. Suzuki; A. Yamazaki; Y. Takahashi; U. Inan; I. Linscott; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara; T. Sano; T. Abe; M. Nakamura; H. Oda; Z. -I. Kawasaki
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, AMER GEOPHYSICAL UNION, 120, 9, 3822-3851, May 2015, Peer-reviwed
Scientific journal, English - 圧縮センシングを用いた気象用レーダの大容量観測データの圧縮
嶋村重治; 菊池博史; 松田祟弘; 金寛; 吉川栄一; 中村佳敬; 牛尾知雄
電気学会論文誌A(基礎・材料・共通部門誌), 135, 11, 704-710, 2015, Peer-reviwed
Scientific journal, Japanese - VHF Radio Wave Observations by Maido-1 Satellite and Evaluation of Its Relationship with Lightning Discharges
Hiroshi Kikuchi; Satoru Yoshida; Takeshi Morimoto; Tomoo Ushio; Zenichiro Kawasaki
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E96B, 3, 880-886, Mar. 2013, Peer-reviwed, We examine the relationship between 116 VHF sensor events recorded by the VHF sensor on the Maido-1 satellite and lightning strokes detected by the World Wide Lightning Location Network (WWLLN) to show that most of the VHF sensor events were caused by lightning discharges. For each VHF sensor event, the WWLLN events within 1400 km from the subsatellite point and within 1 sec, 30 sec, and 300 sec of the VHF sensor trigger time are analyzed. We find that the coincidence rates in the North and South American continents, and in Southeast/East Asia and the Australian continent are greater than 0.90. Those in the African and European continents, and in the Pacific and Atlantic Oceans are less than 0.61. These high enough coincidence rates indicate that the VHF sensor events were emitted from lightning, although the coincidence rates in the other regions are quite low because of the low detection efficiency of the WWLLN in the regions. We also focus on 6 coincident events measured by both the VHF sensor and the WWLLN. The incidence angles of the EM waves for the VHF sensor are estimated from the group delay characteristics of the recorded EM waveforms. Compared with the WWLLN lightning locations, the two incidence angles are temporally and spatially coincident. These results indicate that a large fraction of the VHF sensor events are emitted by lightning discharges.
Scientific journal, English - 人工衛星によるVHF帯電磁波を用いた雷放電位置推定に対する電離圏の影響評価
菊池博史; 吉田智; 森本健志; 牛尾知雄; 河崎善一郎
電気学会論文誌A(基礎・材料・共通部門誌）, 133, 159-165, 2013, Peer-reviwed
Scientific journal, Japanese - Lightning and sprite observation from international space station
Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Makoto Suzuki; Hiroshi Kikuchi; Atsushi Yamazaki; Yukihiro Takahashi; Yasuhide Hobara; Umran Inan; Ivan Linscott; Yuji Sakamoto; Ryohei Ishida; Masavuki Kikuchi; Kazuya Yoshida; Zen Ichiro Kawasaki
IEEJ Transactions on Fundamentals and Materials, 131, 1, 16-20, 2011, Peer-reviwed
Scientific journal, English - The Global Lightning and sprIte Measurement (GLIMS) mission on International Space Station
Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Makoto Suzuki; Hiroshi Kikuchi; Atsushi Yamazaki; Yukihiro Takahashi; Yasuhide Hobara; Umran Inan; Ivan Linscott; Yuji Sakamoto; Ryohei Ishida; Masayuki Kikuchi; Kazuya Yoshida; Zen Ichiro Kawasaki
IEEJ Transactions on Fundamentals and Materials, 131, 12, 971-976, 2011, Peer-reviwed
Scientific journal, English - VHF Lightning observations on JEM-GLIMS mission: - Gradual approach to realize space-borne VHF broadband digital interferometer
Takeshi Morimoto; Hiroshi Kikuchi; Mitsuteru Sato; Makoto Suzuki; Atsushi Yamazaki; Tomoo Ushio
IEEJ Transactions on Fundamentals and Materials, 131, 12, 977-982, 2011, Peer-reviwed
Scientific journal, English - Wideband Radio Wave Observations of Lightning Discharge by Maido-1 Satellite
Hiroshi Kikuchi; Takeshi Morimoto; Tomoo Ushio; Zen Kawasaki
IEICE TRANSACTIONS ON COMMUNICATIONS, IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG, E93B, 8, 2226-2227, Aug. 2010, Peer-reviwed
Scientific journal, English - Satellite Observations for Lightning Discharges and Analysis of VHF Electromagnetic Waveforms
H. Kikuchi; S. Yoshida; T. Morimoto; T. Ushio; Z.-I. Kawasaki
IEEJ Transactions on Fundamentals and Materials, 131, 705-710, 2010, Peer-reviwed
Scientific journal, English
MISC
- フェーズドアレイ気象レーダにおけるグランドクラッタ抑制手法の検討
高田 裕佳; 和田 有希; 北原 大地; 菊池 博史; 牛尾 知雄
Sep. 2023, 電気学会 基礎・材料・共通部門（A部門）, Peer-reviwed - 気象用二重偏波フェーズドアレイレーダとCNN及びLSTMを用いた豪雨検知手法
後藤 翼; 菊池 博史; 芳原 容英; 牛尾 知雄
Sep. 2023, 電気学会 基礎・材料・共通部門（A部門）, Peer-reviwed - Multi-Frequency Observation of Downward Terrestrial Gamma-ray Flashes in Winter Thunderstorms
Y. Wada; T. Morimoto; Y. Nakamura; T. Enoto; H. Kikuchi; E. Yoshikawa; T. Ushio
Aug. 2023, URSI GASS 2023, HGE1-2-2, Peer-reviwed - Ideas for Radar Data Denoising and Fusion Based on Image Processing Techniques
D. Kitahara; Y. Wada; T. Mega; T. Enoto; E. Yoshikawa; H. Kikuchi; T. Ushio
Aug. 2023, URSI GASS 2023, F03-1-2, Peer-reviwed - Prediction of Downbursts Using Machine Learning of Total Lightning and Ground Precipitation Data in Japan
Y. Hobara; S. Miyashita; H. Kikuchi; J. Lapierre; T. Ushio
Aug. 2023, URSI GASS 2023, EFGH-2-1, Peer-reviwed - Observations of summer thunderstorms with X-band dual polarized phased array weather radar and LF/MF band lightning location system
H. Kikuchi; Y. Nakamura; E. Yoshikawa; T. Morimoto; T. Ushio; Y. Hobara
Lead, Aug. 2023, URSI GASS 2023, EFGH-1-1, Peer-reviwed - Total Lightning Distribution and Heavy Rainfall Characteristics Associated With Multicellular Thunderstorms
D. Mondal; Y. Hobara; H. Kikuchi; J. Lapierre
Aug. 2023, URSI GASS 2023, EFGH-1-3, Peer-reviwed - Modeling Atmosphere-Ionosphere Coupling on Gravity Waves during 2019 Typhoon 15 and 19 using FDTD Method
A. Setiawan; S. Hirai; H. Kikuchi; Y. Hobara
Aug. 2023, URSI GASS 2023, EFGH-4-2, Peer-reviwed - トータル雷および気象データの機械学習を⽤いた国内突⾵現象の発⽣予測に関する研究
宮下志保; 芳原容英; 菊池博史
Jan. 2023, 第101回日本大気電気学会 - 気象用二重偏波フェーズドアレイ気象レーダと地上⾬量計による降⾬強度推定の⾼度化
馬場直人; 菊池博史; 芳原容英; 牛尾知雄
Jan. 2023, 第101回日本大気電気学会 - 地震直前後の大気電界変動の統計調査
渡辺真子; 芳原容英; 菊池博史
Jan. 2023, 第101回日本大気電気学会 - 地震直前後の大気電界と下部電離層擾乱に関する研究
三須孝一郎; 芳原容英; 渡辺真子; 菊池博史
Jan. 2023, 第101回日本大気電気学会 - 気象用二重偏波フェーズドアレイ気象レーダと LF 帯雷放電標定装置を⽤いた雲内粒⼦と放電過程の時系列変化
鹿倉周太郎; 菊池博史; 芳原容英; 吉川栄一; 中村佳敬; 森本健志; 牛尾知雄
Jan. 2023, 第101回日本大気電気学会 - 大電荷量落雷を発生させた雷撃と気象学的特性の調査
永尾伸吾; 芳原容英; 菊池博史; 大橋拓彦; 白石智規; 吉川栄一; 中村佳敬; 森本健志; 牛尾知雄
Jan. 2023, 第101回日本大気電気学会 - 北陸冬季雷での地球ガンマ線フラッシュの多波長観測
和田有希; 森本健志; 中村佳敬; 榎戸輝揚; 菊池博史; 吉川栄一; 牛尾知雄
Jan. 2023, 第101回日本大気電気学会 - Thunderstorms and Total Lightning Characteristics Causing Heavy Precipitation in Japan: A Case Study
D. Mondal; Y. Hobara; H. Kikuchi; J. Lapierre
2023, Radio Science Bulletin (accepted), Peer-reviwed - Development of a 3-D Precipitation Nowcasting Method Using U-Net with Phased Array Radar Data
K. Kawashima; D. Kitahara; D. K. Kim; T. Mega; Y. Wada; T. Ushio; P. Baron; E. Yoshikawa; S. Hayashi; H. Kikuchi
Dec. 2022, American Geophysical Union 2022 - Observation of two downward terrestrial gamma-ray flashes with very-high-frequency waveform recordings
Y. Wada; T. Morimoto; Y. Nakamura; T. Enoto; H. Kikuchi; E. Yoshikawa; T. Ushio
Dec. 2022, American Geophysical Union 2022, Peer-reviwed - 二重偏波フェーズドアレイ気象レーダとU-Netを用いた3次元降水ナウキャスト手法の開発
川島康平; 北原大地; 金東均; 妻鹿友昭; 和田有希; 牛尾知雄; Philippe Baron,吉川栄一, 林修吾, 菊池博史
Oct. 2022, 日本気象学会2022年度秋季大会 - Calibration approach of ground-based weather radar network using dual-frequency precipitation radar on the global precipitation measurement
T. Goto; H. Kikuchi; Y. Nakamura; T. Ushio; T. Mega; Y. Hobara
Sep. 2022, 2022 URSI-Japan Radio Science Meeting, Peer-reviwed - T. Ushio, H. Kikuchi, Y. Wada, and E. Yoshikawa,
T. Ushio; H. Kikuchi; Y. Wada; E. Yoshikawa
Sep. 2022, 2022 URSI-Japan Radio Science Meeting - Observations of Precipitation Cores with X-band Dual Polarized Phased Array Weather Radar and LF Band Lightning Location System
H. Kikuchi; Y. Nakamura; E. Yoshikawa; T. Morimoto; T. Ushio; Y. Hobara
Lead, Sep. 2022, 2022 URSI-Japan Radio Science Meeting, Peer-reviwed - Modeling Atmosphere-Ionosphere Coupling during Typhoon 15 Using FDTD Method
A. D. Setiawan; Y. Hobara; H. Kikuchi
Sep. 2022, 2022 URSI-Japan Radio Science Meeting, Peer-reviwed - Statistical analysis of the Atmospheric Electric Field Fluctuations associated with Earthquakes in Japan
M. Watanabe; Y. Hobara; H. Kikuchi; R. Miyajima
Sep. 2022, 2022 URSI-Japan Radio Science Meeting, Peer-reviwed - K. Misu, M. Watanabe, H. Kikuchi, Y. Hobara
Lower Ionospheric Fluctuations; Atmospheric Electric Field; Immediately around Earthquake
Sep. 2022, 2022 URSI-Japan Radio Science Meeting, Peer-reviwed - Development in Progress on C-band Phased Array Weather Radar with Comb Beam Transmission
E. Yoshikawa; T. Ushio; H. Kikuchi; S. Shimamura
Aug. 2022, Peer-reviwed - LF帯雷放電標定装置と二重偏波フェーズドアレイ気象レーダを用いた積乱雲の発達過程の観測
菊池博史; 及川夏依; 芳原容英; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄
Lead, Jun. 2022, JpGU Symposium 2022, Peer-reviwed - 二重偏波フェーズドアレイレーダを用いたLSTMによる3D-Nowcast手法の開発
川島康平; KIM DONG-KYU; 妻鹿友昭; 和田有希; 牛尾知雄; Baron Philippe; 吉川栄一; 林修吾; 菊池博史
Jun. 2022, JpGU Symposium 2022 - LF Receiver Network for Winter Lightning in Hokuriku and Its Recent Observations
T. Morimoto; Y. Nakamura; E. Yoshikawa; H. Kikuchi; Y. Hobara; T. Ushio
Jun. 2022, 17th International Conference on Atmospheric Electricity, Peer-reviwed - Atmospheric Electric Field Anomaly Observed Immediately Before and After Earthquakes
Y. Hobara; R. Miyajima; M. Watanabe; H. Kikuchi
Jun. 2022, 17th International Conference on Atmospheric Electricity, Peer-reviwed - High Temporal Resolution Observations of Precipitation Cores with Dual Polarized Phased Array Weather Radar and LF Band Lightning Location System
H. Kikuchi; E. Yoshikawa; Y. Nakamura; T. Ushio; T. Morimoto; Y. Hobara
Lead, Jun. 2022, 17th International Conference on Atmospheric Electricity, Peer-reviwed - 気象用二重偏波フェーズドアレイ気象レーダとLF帯雷放電標定装置を用いた夏季積乱雲の観測
菊池博史; 及川夏衣; 芳原容英; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄
Mar. 2022, 大気電気学会誌(Web), 16, 1, 1882-0549, 202202222020886946 - 衛星搭載レーダGPM/DPRとフェーズドアレイレーダの比較-2016年と2019年の事例から-
後藤翼; 中村佳敬; 浅井啓太郎; 菊池博史; 妻鹿友昭; 牛尾知雄
2021, 大気電気学会誌(Web), 15, 1, 1882-0549, 202102244227470866 - Ku帯広帯域偏波レーダによる2020年11月20日の降水観測
石原竜希; 中村佳敬; 牛尾知雄; 栗林雷旗; 妻鹿友昭; 吉川栄一; 菊池博史
2021, 大気電気学会誌(Web), 15, 1, 1882-0549, 202102267088929192 - Example analyses of Satellite-mounted weather radar for calibrating ground-based radars
後藤翼; 中村佳敬; 菊池博史; 妻鹿友昭; 牛尾知雄
2021, 電気学会基礎・材料・共通部門大会(Web), 2021, 202202237404111709 - Nonlinear Beamforming via Convex Optimization for Phased Array Weather Radar
Daichi Kitahara; Maya Nakahara; Akira Hirabayashi; Eiichi Yoshikawa; Hiroshi Kikuchi; Tomoo Ushio
© 2018 APSIPA organization. In this paper, we propose a nonlinear beamforming method for a phased array weather radar (PAWR). Conventional beamforming methods are linear in the sense that a signal arriving from each elevation is reconstructed by computing a weighted sum of the received signals. For distributed targets such as raindrops, however, the number of backscattered signals is very large differently from the case for point targets. Thus, the spatial resolution of the linear methods is limited. To improve the spatial resolution, we focus on two characteristics of the signals from the distributed targets. One is the continuity of the reflection intensity in the time and spatial domains. The other is the narrow bandwidth in the frequency domain. These can be expressed as group-sparsity of certain matrices, and we reconstruct the signals by solving a convex optimization problem based on the group-sparsity. Simulations using real PAWR data show that the proposed method captures fine variation of precipitation profile with high precision., 04 Mar. 2019, 2018 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2018 - Proceedings, 1831-1835, Peer-reviwed, 85063504625 - Initial observations of Multi-parameter phased array radar in Tokyo area
Hiroshi Kikuchi; Taku Suezawa; Atsuya Onuki; Tomoo Ushio
© 2019 URSI. All rights reserved. In Japan, the five single polarization phased array weather radars (PAWR) are under operation. As a next radar development project, a dual polarimetric phased array weather radar has been developed. It can provide dual polarimetric parameters that reveal detailed microphysics of storms in addition to accurate the precipitation estimation. The radar is termed “Multi-parameter phased array weather radar; MP-PAWR”., Mar. 2019, 2019 URSI Asia-Pacific Radio Science Conference, AP-RASC 2019, Peer-reviwed, 85068589755 - 鉛直観測によるKuレーダの偏波間較正
浅井啓太郎; 中村佳敬; 菊池博史; 妻鹿友昭; 牛尾知雄; 吉川栄一; 森本健志
30 Oct. 2018, 大気電気学会誌, 12, 1, 227, Japanese, 1882-0549, 201802273168177913 - Ku帯広帯域二重偏波レーダによる降水観測―2017年6月1日の事例―
浅井啓太郎; 中村佳敬; 吉川栄一; 菊池博史; 妻鹿友昭; 牛尾知雄; 森本健志
30 Sep. 2018, 日本気象学会大会講演予稿集, 114, 443, Japanese, 201802284172969520 - Convolutin Neural Networkを用いた短時間降水予測手法の開発
末澤卓; 妻鹿友昭; 菊池博史; 吉田翔; 水谷文彦; 吉見和紘; 牛尾知雄
30 Apr. 2018, 日本気象学会大会講演予稿集, 113, 308, Japanese, 201802276511971473 - Fast high-quality three-dimensional reconstruction from compressive observation of phased array weather radar
Ryosuke Kawami; Hidetomo Kataoka; Daichi Kitahara; Akira Hirabayashi; Takashi Ijiri; Shigeharu Shimamura; Hiroshi Kikuchi; Tomoo Ushio
© 2017 IEEE. Phased array weather radar (PAWR) is capable of spatially and temporally high resolution observation. This means that a PAWR generates a huge amount of observation data, say 500 megabytes in every 30 seconds. To transfer this big data in a public internet line, this paper proposes a fast 3D compressive sensing method for PAWR. The proposed method reconstructs the original data, from compressed data, as the minimizer of a convex function which evaluates the local similarity in the spatial domain and the sparsity in the frequency domain. By combining blockwise optimization with Nesterov's acceleration, we obtain an approximate solution of the above convex optimization problem at high speed. Numerical simulations show that the proposed method outperforms conventional reconstruction methods., 05 Feb. 2018, Proceedings - 9th Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, APSIPA ASC 2017, 2018-February, 44-49, Peer-reviwed, 85050808640 - 気象用フェーズドアレイレーダ観測データとNeural Networkを用いた短時間降水予測手法の検討
末澤卓; 妻鹿友昭; 菊池博史; 吉田翔; 水谷文彦; 吉見和紘; 牛尾知雄
2018, 大気電気学会誌, 12, 1, 1882-0549, 201802229712998473 - Osaka urban phased array radar network experiment
Tomoo Ushio; Shigeharu Shimamura; Hiroshi Kikuchi; Fumihiko Mizutani; Kenichi Naito; Takahiro Watanabe; Masakazu Wada; Nobuhiro Takahashi
© 2017 IEEE. Osaka University, Toshiba and the Osaka Local Government started a new project to develop the Osaka Urban Demonstration Network. The main sensor of the Osaka Network is a 2-node Phased Array Radar Network and lightning location system. Data products that are created both in local high performance computer and Toshiba Computer Cloud, include single and multi-radar data, vector wind, quantitative precipitation estimation, VIL, nowcasting, lightning location and analysis. These new products are transferred to Osaka Local Government in operational mode and evaluated by several section in Osaka Prefecture., 01 Dec. 2017, International Geoscience and Remote Sensing Symposium (IGARSS), 2017-July, 5966-5968, Peer-reviwed, 85041838988 - Ku帯広帯域二重偏波レーダによる平成29年6月1日の降雨観測
浅井啓太郎; 中村佳敬; 菊池博史; 妻鹿友昭; 牛尾知雄; 森本健志
06 Nov. 2017, 電気関係学会関西連合大会講演論文集(CD-ROM), 2017, ROMBUNNO.G7‐12, Japanese, 201702210491514103 - 3-dimensional compressive sensing and high-quality recovery for phased array weather radar
Ryosuke Kawami; Akira Hirabayashi; Takashi Ijiri; Shigeharu Shimamura; Hiroshi Kikuchi; Tomoo Ushio
© 2017 IEEE. This paper proposes an effective three-dimensional compressive sensing method for the phased array weather radar (PAWR), which is capable of three-dimensional observation with spatially and temporally high resolution. Because of the large amount of observation data, which is approximately 1 gigabyte per minute, data compression is an essential technology to conduct a network observation by multiple PAWRs. Even though many conventional studies applied compressive sensing (CS) to weather radar measurements, their reconstruction quality should be further improved. To this end, we define a cost function for a three-dimensional recovery exploiting not only local similarity but also global redundancy of weather radar measurements. Since the cost function is convex, we can derive an efficient algorithm based on the standard convex optimization techniques. Simulation results show that the proposed method achieves normalized errors less than 10% for 25% compression ratio with outperforming conventional two-dimensional methods., 01 Sep. 2017, 2017 12th International Conference on Sampling Theory and Applications, SampTA 2017, 658-661, Peer-reviwed, 85031696994 - Design and development of X-band polarimetric phased array weather radar
喜田 智亮; 牛尾 知雄; 妻鹿 友昭; 菊池 博史; 嶋村 重治
電子情報通信学会, 20 Apr. 2017, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 117, 2, 75-79, Japanese, 0913-5685, 40021187706, AN10060764 - A Study on Compressive Sensing Data Transfer for Network Operation of Phased Array Weather Radar
菊池 博史; 川見 亮介; 平林 晃; 井尻 敬; 嶋村 重治; 金 寛; 牛尾 知雄
電子情報通信学会, 24 Nov. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 318, 35-40, Japanese, 0913-5685, 40021033022, AN10060822 - A Study on Compressive Sensing Data Transfer for Network Operation of Phased Array Weather Radar
菊池 博史; 川見 亮介; 平林 晃; 井尻 敬; 嶋村 重治; 金 寛; 牛尾 知雄
電子情報通信学会, 24 Nov. 2016, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 116, 317, 35-40, Japanese, 0913-5685, 40021032108, AN10060764 - シンポジウム「フェーズドアレイレーダー」の報告 : 研究開発の現状と将来展望
楠 研一; 牛尾 知雄; 菊池 博史; 水谷 文彦; 柏柳 太郎; 佐藤 晋介; 足立 透; 吉田 翔; 小池 佳奈; 岩波 越
日本気象学会, Aug. 2016, 天気, 63, 8, 587-590, Japanese, 0546-0921, 40020951374, AN00151568 - ISS/JEM‐GLIMSミッションによる雷放電の電波および光学観測
森本健志; 菊池博史; 牛尾知雄; 佐藤光輝; 山崎敦; 鈴木睦; 菊池雅行
30 Apr. 2016, 日本気象学会大会講演予稿集, 109, 350, Japanese, 201602221194961572 - フェーズドアレイ気象レーダにおける圧縮センシングデータからの2次元高精度再構成
川見亮介; 平林晃; 田中啓透; 柴田基; 井尻敬; 嶋村重治; 菊池博史; KIM Gwan; 牛尾知雄
2016, 電気学会電子・情報・システム部門大会講演論文集(CD-ROM), 2016, 201602235810595003 - 2-Dimensional High-Quality Reconstruction of Compressive Measurements of Phased Array Weather Radar
Ryosuke Kawami; Akira Hirabayashi; Nobuyuki Tanaka; Motoi Shibata; Takashi Ijiri; Shigeharu Shimamura; Hiroshi Kikuchi; Gwan Kim; Tomoo Ushio
This paper proposes a compressive sensing method for the phased array weather radar (PAWR), which is capable of three-dimensional observation with high spatial resolution in 30 seconds. Because of the large amount of observation data, which is more than 1 gigabyte per minute, data compression is an essential technology to operate PAWR in the real world. Even though many conventional studies applied compressive sensing (CS) to weather radar measurements, their reconstruction quality should be further improved. To this end, we define a new cost function that expresses prior knowledge about weather radar measurements, i.e., local similarities. Since the cost function is convex, we can derive an efficient algorithm based on the so-called convex optimization techniques, in particular simultaneous direction method of multipliers (SDMM). Simulation results show that the proposed method outperforms the conventional methods for real observation data with improvement of 4% in the normalized error., IEEE, 2016, 2016 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA), English, Peer-reviwed, WOS:000393591800015 - スプライトを誘起した雷放電による上空電子密度擾乱の再現
佐藤光輝; 平木康隆; 足立透; 牛尾知雄; 森本健志; 菊池博史; 鈴木睦; 山崎敦; 高橋幸弘
2016, 地球電磁気・地球惑星圏学会総会及び講演会(Web), 140th, ROMBUNNO.R005‐P18 (WEB ONLY), Japanese, 201802290176583557 - Horizontal distributions of sprites derived fromthe JEM-GLIMS nadir observations
M. Sato; M. Mihara; T. Adachi; T. Ushio; T. Morimoto; M. Kikuchi; H. Kikuchi; M. Suzuki; A. Yamazaki; Y. Takahashi; U. Inan; I. Linscott; R. Ishida; Y. Sakamoto; K. Yoshida; Y. Hobara
© 2016. American Geophysical Union. All Rights Reserved. Global Lightning and Sprite Measurements on Japanese Experiment Module (JEM-GLIMS) started the nadir observations of lightning discharges and transient luminous events (TLEs) from the International Space Station (ISS) since November 2012. In the nadir observations, JEM-GLIMS optical instruments have to simultaneously detect incomparably intense lightning emissions and weak TLE emissions. To distinguish TLEs, especially sprite events, from lightning events, combined data analytical methods are adopted: (1) a subtraction of the wideband camera image from the narrowband camera image, (2) a calculation of the intensity ratio between different photometer channels, and (3) an estimation of the polarization and charge moment changes for the TLE-producing lightning discharges. We succeeded in identifying numbers of sprite events using the combined analytical methods, and here we report three sprite events detected by JEM-GLIMS as a case study. In the subtracted images, sprite emissions are located over the area of the sprite-producing lightning emissions. However, these sprites and sprite-producing lightning discharges did not occur at the nadir point of the ISS. For this reason, the geometry conversion of the sprite and sprite-producing lightning emissions as observed from the point just over the sprite-producing lightning discharges is performed. In the geometry-converted images, the locations of the sprite emissions are clearly displaced by 8-20 km from the peak positions of the sprite-producing lightning emissions. Thus, the first quantitative spatial distributions of sprites and sprite-producing lightning discharges from the JEM-GLIMS nadir observations are revealed., 01 Jan. 2016, Journal of Geophysical Research, 121, 7, 3171-3194, 0148-0227, 2156-2202, 84962725134 - P135 気象用二重偏波フェーズドアレイレーダのビーム形成手法と実用化に関する検討(ポスター・セッション)
菊池 博史; 田島 拓朗; 呉 亭; 金 寛; 牛尾 知雄; 後藤 秀人; 水谷 文彦
日本気象学会, 2015, 大会講演予講集, 108, 215-215, Japanese, 110010012999, AA11552241 - D311 国際宇宙ステーションからの雷放電と高高度発光現象の観測(降水システムIII,一般口頭発表)
牛尾 知雄; 佐藤 光輝; 鈴木 睦; 森本 健志; 菊池 博史; 菊池 雅行; 足立 透; 山崎 敦; 高橋 幸弘; Inan U.; Lhscott I.; 石田 良平; 坂本 祐二; 吉田 和哉; 芳原 容英; 阿部 琢己; 中村 正人; 織田 裕久
日本気象学会, 2015, 大会講演予講集, 108, 380-380, Japanese, 110010013160, AA11552241 - VHF radio observations of lightning discharges on JEM-GLIMS
Hiroshi Kikuchi; Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Atsushi Yamazaki; Makoto Suzuki
© 2014 The Institute of Electronics, Information and Communication Engineer. Since 2012, the global lightning and sprite measurements (GLIMS) mission has been conducted on the exposed facility of Japanese experiment module (JEM-EF) of the international space station (ISS). In this mission, the VHF broadband digital interferometer (VITF) attached on JEM-EF is designed to estimate the direction of arrival of electromagnetic waves. The VITF has the bandwidth from 70 MHz to 100 MHz. The electromagnetic radiations from lightning discharges received by two antennas are digitized by the 2-channel AD converter. We introduce the outline of the mission and the VITF. The initial observational results with the VITF of the GLIMS mission are presented. The comparison of the results of arrival direction estimation of the VITF with optical observations using two methods which are an interferometry technic and the group delay characteristic of EM waves. The results agree with the position of the lightning emission captured by the LSI., 23 Dec. 2014, IEEE International Symposium on Electromagnetic Compatibility, 2014-December, 398-401, Peer-reviwed, 1077-4076, 2158-1118, 84942574112 - Relationship between lightning and VHF radiation measured on JEM-GLIMS
菊池 博史; 森本 健志; 牛尾 知雄
電子情報通信学会, 19 Dec. 2014, 電子情報通信学会技術研究報告 = IEICE technical report : 信学技報, 114, 381, 53-56, Japanese, 0913-5685, 40020324602, AN1001312X - JEM‐GLIMSにおけるVHF帯電磁波を用いた電磁波到来方向推定手法の検討
菊池博史; 森本健志; 牛尾知雄; 佐藤光輝; 山崎敦; 鈴木睦
21 Aug. 2014, 電気学会基礎・材料・共通部門大会講演論文集(CD-ROM), 2014, ROMBUNNO.21-A-A1-6, Japanese, 201402252281608941 - 国際宇宙ステーションからのVHF帯電磁波を用いた雷放電観測と光学観測結果との比較
菊池博史; 森本健志; 牛尾知雄; 佐藤光輝; 山崎敦; 鈴木睦
18 Apr. 2014, 大気電気学会誌, 8, 1, 143-144, Japanese, 1882-0549, 201402278486207507 - P231 周波数の有効利用を目的とした協調制御型気象レーダシステムの検討 : その7 2次元アレイアンテナにおける偏波パラメータ観測精度(ポスターセッション)
菊池 博史; 呉 亭; 商 進; 金 寛; 牛尾 知雄; 後藤 秀人; 水谷 文彦; Chandrasekar V.
日本気象学会, 2014, 大会講演予講集, 105, 229-229, Japanese, 110009846687, AA11552241 - B116 二次元フェーズドアレイを用いた偏波観測精度の評価(高速スキャンレーダーによる激しい大気現象の観測:現状と将来展望,スペシャル・セッション)
菊池 博史; 田島 拓朗; 商 進; 呉 亭; 金 寛; 牛尾 知雄; 後藤 秀人; 水谷 文彦; Chandrasekar V.
日本気象学会, 2014, 大会講演予講集, 106, 78-78, Japanese, 110009897670, AA11552241 - B115 二重偏波フェーズドアレイ気象レーダーの開発(高速スキャンレーダーによる激しい大気現象の観測:現状と将来展望,スペシャル・セッション)
木田 智史; 水谷 文彦; 後藤 秀人; 山田 亜希子; 和田 将一; 牛尾 知雄; 菊池 博史; 佐藤 晋介; 花土 弘; 川村 誠治
日本気象学会, 2014, 大会講演予講集, 106, 77-77, Japanese, 110009897669, AA11552241 - Propagation characteristics of VHF waves recorded on the International Space Station
Hiroshi Kikuchi; Takeshi Morimoto; Tomoo Ushio; Mitsuteru Sato; Atsushi Yamazaki; Makoto Suzuki
© International Conference on Atmospheric Electricity, ICAE 2014 We has been conducted the lightning observation with four type sensors at the International Space Station (ISS). One of the sensors is very high frequency interferometer: VITF. The objective of the VITF is to locate the radiation source of received signals with two very high frequency interferometer (VHF) sensors attached on the ISS. Lightning and sprite imager: LSI is also one of the optical sensor for the observation of lightning and sprite. The LSI consists of two CMOS sensors. The image captured with the LSI gives us an information of lighting position. While the VITF has the two sensors. Although the VITF is able to estimate the direction of arrival estimation using the radio interferometric technique, we cannot locate the radiation source position. The location method are used as two direction of arrival (DOA) estimation techniques, which are the interferometric technique and based on the measurement of the group delay of the received signals. The combination of the two techniques gives us the two possible position of the radiation source when an altitude of a radiation source is assumed. The initial comparison with the optical lightning position captured with LSI are reported., 2014, International Conference on Atmospheric Electricity, ICAE 2014, Peer-reviwed, 85086407209 - VHF radio observations of lightning discharges on JEM-GLIMS
Hiroshi Kikuchi; Tomoo Ushio; Takeshi Morimoto; Mitsuteru Sato; Atsushi Yamazaki; Makoto Suzuki
Since 2012, the global lightning and sprite measurements (GLIMS) mission has been conducted on the exposed facility of Japanese experiment module (JEM-EF) of the international space station (ISS). In this mission, the VHF broadband digital interferometer (VITF) attached on JEM-EF is designed to estimate the direction of arrival of electromagnetic waves. The VITF has the bandwidth from 70 MHz to 100 MHz. The electromagnetic radiations from lightning discharges received by two antennas are digitized by the 2-channel AD converter. We introduce the outline of the mission and the VITF. The initial observational results with the VITF of the GLIMS mission are presented. The comparison of the results of arrival direction estimation of the VITF with optical observations using two methods which are an interferometry technic and the group delay characteristic of EM waves. The results agree with the position of the lightning emission captured by the LSI., IEEE, 2014, 2014 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, TOKYO (EMC'14/TOKYO), 398-401, English, Peer-reviwed, 2158-110X, WOS:000411491100101 - Global Lightning and Sprite Measurements from International Space Station
Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Hiroshi Kikuchi; Makoto Suzuki; Atsushi Yamazaki; Yasuhide Hobara; Toru Adachi
The Global Lightning and sprIte MeasurementS (GLIMS) on the International Space Station (ISS) is a mission to detect and locate optical transient luminous events (TLEs) and its associated lightning simultaneously from the non-sun synchronous orbit, and is scheduled to be launch from Japan in January, 2012 as part of the multi-mission consolidated equipment on Japanese Exposure Module (JEM). Our mission goals are (1) to detect and locate lightning and sprite within storm scale resolution over a large region of the Earth's surface along the orbital track of the ISS without any bias, (2) to clarify the generation mechanism of sprite, and (3) to identify the occurrence conditions of TLEs. To achieve these goals, two CMOS cameras, six Photometers, VLF receiver, and VHF interferometer with two antennas, are installed at the bottom of the module to observe the TLEs as well as causative lighting discharges at nadir direction during day and night time. Though the luminous events so-called sprite, elves and jets have been investigated by numerous researchers all over the world based mainly on the ground observations, some important problems have not been fully understood yet such as generation mechanisms of columniform fine structure and horizontal offset of some sprites from the parent lightning discharges. In the JEM-GLIMS mission, observations from our synchronized sensors are going to shed light on above-mentioned unsolved problems regarding TLEs as well as causative lighting discharges. In this presentation, the scientific background, instrumentation, project summaries and initial observation results are given., IEEE, 2014, 2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), English, Peer-reviwed, WOS:000366628702062 - Development and Observation of the Phased Array Radar at X band
Tomoo Ushio; Shigeharu Shimamura; Ting Wu; Hiroshi Kikuchi; Eiichi Yoshikawa; Fumihiko Mizutani; Masakazu Wada; Shinsuke Satoh; Toshio Iguchi
A new Phased Array Radar (PAR) system for meteorological application has been developed by Toshiba Corporation and Osaka University under a grant of NICT, and installed in Osaka University, Japan in 2012. The phased array radar system developed has the unique capability of scanning the whole sky with 100m and 10 to 30 second resolution up to 60 km. The system adopts the digital beam forming technique for elevation scanning and mechanically rotates the array antenna in azimuth direction within 10 to 30 seconds. The radar transmits a broad beam of several degrees with 24 antenna elements and receives the back scattered signal with 128 elements digitizing at each elements. Then by digitally forming the beam in the signal processor, the fast scanning is realized. After the installation of the PAR system in Osaka University, the initial observation campaign was conducted in Osaka urban area with Ku-band Broad Band Radar (BBR) network, C-band weather radar, and lightning location system. The initial comparison with C band radar system shows that the developed PAR system can observe the behavior of the thunderstorm structure in much more detail than any other radar system. The observed high temporal resolution images of the severe thunderstorm are introduced, showing the potential capabilities of the PAR system. The correlation coefficient of the reflectivity in PAR with C band radar ranges from 0.6 to 0.9 as a function of the distance from the PAR., IEEE, 2014, 2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), English, Peer-reviwed, WOS:000366628702124 - 国際宇宙ステーションからの雷放電に伴うVHF帯電磁波の観測と周波数特性
菊池博史; 森本健志; 吉田智; 牛尾知雄; 佐藤光輝; 鈴木睦
日本気象学会, 31 Oct. 2013, 日本気象学会大会講演予稿集, 104, 104, 281-281, Japanese, 201302286898329246, 110009801548, AA11552241 - JEM‐GLIMSによるISSからのVHF帯電磁波観測の初期結果報告
森本健志; 菊池博史; 吉田智; 牛尾知雄; 河崎善一郎; 佐藤光輝; 山崎敦; 鈴木睦
25 Oct. 2013, 大気電気学会誌, 7, 2, 91-92, Japanese, 1882-0549, 201302235190511822 - Radio observations of lightning discharges with a small satellite and the international space station
菊池博史; 森本健志; 吉田智; 牛尾知雄; 河崎善一郎; 佐藤光輝; 鈴木睦
電子情報通信学会, 21 Jun. 2013, 電気学会電磁環境研究会資料, EMC-13, 19-33, 35-38, Japanese, 0913-5685, 201302228074727447, 10031182501, AA11404288 - 小型人工衛星「まいど1号」による雷観測と取得されたVHF帯広帯域電磁波形に関する考察
森本健志; 菊池博史; 吉田智; 牛尾知雄; 河崎善一郎
01 Jun. 2013, 輻射科学研究会資料集, 2012, 68-74, Japanese, 201302252810133388 - The ionospheric effect on the determination of lightning source location using VHF radio waves by satellite remote sensing
Hiroshi Kikuchi; Satoru Yoshida; Takeshi Morimoto; Tomoo Ushio; Zen Ichiro Kawasaki
The well-developed thundercloud causes local downpours and tornadoes accompanied with lightning discharges. The remote sensing for lightning discharges from space is useful for the short-term forecast of weather disasters over vast areas, the understanding of global electrical circuit, and so forth. The broadband digital interferometer (DITF) has been already used to study on the lightning activities as ground-based equipment. The DITF makes it possible to visualize lightning channels by VHF radio observations. The goal of the study, in future, is to realize the space borne DITF and to monitor the thunderstorm activities constantly. In 2012, global lightning and sprite measurements (GLIMS) mission is started its observations on exposed facility of Japanese experiment module (JEM-EF) of the international space station (ISS). The very high frequency (VHF) broadband digital interferometer (VITF) attached on JEM-EF is designed to estimate the direction of arrival with about 10 km resolution. This paper discusses the propagation characteristics through the ionosphere of the VHF radio waves with Lightning Discharges. The numerical simulation based on the ray-tracing method in consideration of the electron density in the ionosphere is performed. The electron density in the nighttime ionosphere has an insignificant effect on the propagation path of the VHF waves, while the electron density in the daytime ionosphere causes the distance error between the radiation source and the estimated radiation source using the VITF is greater than several tens of kilometers when the incident angle for the VITF antenna is greater than 60 degrees. © 2013 The Institute of Electrical Engineers of Japan., The Institute of Electrical Engineers of Japan, 10 May 2013, IEEJ Transactions on Fundamentals and Materials, 133, 4, 159-165, Japanese, 0385-4205, 10031161237, AN10136312, 84877105855 - 宇宙ステーションからのVHF帯電磁波による雷放電初期観測結果
菊池博史; 吉田智; 森本健志; 牛尾知雄; 河崎善一郎; 佐藤光輝; 鈴木睦
26 Apr. 2013, 大気電気学会誌, 7, 1, 89-90, Japanese, 1882-0549, 201302239119434863, 10031170138, AA12292204 - P1a1 周波数の有効利用を目的とした協調制御型気象レーダシステムの検討 その4 : 2次元アレイアンテナにおける偏波特性の検討(ポスター・セッション)
菊池 博史; 呉 亭; 商 進; 吉田 智; 金 寛; 牛尾 知雄; 後藤 秀人; 水谷 文彦; Chandrasekar V.
日本気象学会, 2013, 大会講演予講集, 104, 285-285, Japanese, 110009801552, AA11552241 - 国際宇宙ステーションからのVHF帯電磁波を用いた雷放電観測
菊池博史; 森本健志; 牛尾知雄; 佐藤光輝; 山崎敦; 鈴木睦; 菊池雅行; 高橋幸弘; 坂本祐二
2013, 地球電磁気・地球惑星圏学会総会及び講演会予稿集(CD-ROM), 134th, ROMBUNNO.S001-08, Japanese, 201402215641890659 - VHF帯電磁波を用いた宇宙ステーションからの雷放電観測
菊池博史; 吉田智; 森本健志; 牛尾知雄; 河崎善一郎
15 Nov. 2012, 大気電気学会誌, 6, 2, 59-60, Japanese, 1882-0549, 201202205338616064, 10031128619, AA12292204 - A Study on VHF EM Waveforms Recorded by a Low‐earth‐orbit Satellite
森本健志; 菊池博史; 吉田智; 牛尾知雄; 河崎善一郎
15 Nov. 2012, 電気学会電磁界理論研究会資料, EMT-12, 151-174, 127-132, Japanese, 201202234806077605, 10031128997, AN00346578 - 雷放電に伴うVHF帯電磁波の電離層内電磁波伝搬特性
菊池博史; 吉田智; 森本健志; 牛尾知雄; 河崎善一郎
20 Sep. 2012, 電気学会基礎・材料・共通部門大会講演論文集(CD-ROM), 2012, ROMBUNNO.A-1, Japanese, 201202213232883996 - 人工衛星「まいど1号」によるVHF帯電波観測とVLF帯地上雷観測網との比較
菊池 博史; 吉田 智; 森本 健志; 牛尾 知雄; 河崎 善一郎
29 Mar. 2012, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 6, 1, 72-73, Japanese, 1882-0549, 10030566003, AA12292204 - A Study on EM Waveforms Recorded by a Small Satellite "Maido-1"
森本 健志; 菊池 博史; 吉田 智
電子情報通信学会, 26 Jan. 2012, 電子情報通信学会技術研究報告 : 信学技報, 111, 414, 67-72, Japanese, 0913-5685, 40019155278 - 人工衛星「まいど1号」とWWLLNを用いた雷観測結果の比較検討
菊池 博史; 吉田 智; 森本 健志; 牛尾 知雄; 河崎 善一郎
31 Oct. 2011, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 5, 2, 59-60, Japanese, 1882-0549, 10030359516, AA12292204 - 人工衛星「まいど1号」によるTECを用いた到来方向推定
田中 竜太郎; 菊池 博史; 吉田 智; 森本 健志; 牛尾 知雄; 河崎 善一郎
15 Apr. 2011, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 5, 1, 131-131, Japanese, 1882-0549, 10028198092, AA12292204 - Observations of lightning discharges from space and frequency characteristics through the ionosphere
KIKUCHI Hiroshi; TANAKA Ryuutaro; YOSHIDA Satoru; MORIMOTO Takeshi; USHIO Tomoo; KAWASAKI Zen
11 Nov. 2010, 電気学会研究会資料. EMT, 電磁界理論研究会, 2010, 102, 19-22, Japanese, 10027631421, AN00346578 - Lightning and Sprite Observation from International Space Station
USHIO Tomoo; SATO Mitsuteru; MORIMOTO Takeshi; SUZUKI Makoto; KIKUCHI Hiroshi; YAMAZAKI Atsushi; TAKAHASHI Yukihiro; HOBARA Yasuhide; INAN Umran; ISHIDA Ryohei; KAWASAKI Zen-Ichiro
01 Nov. 2010, 電気学会研究会資料. EMC, 電磁環境研究会, 2010, 29, 1-4, Japanese, 10027631055, AA11404288 - Observations of lightning discharges by Maido-1 satellite and radio propagation simulations
菊池 博史; 田中 竜太郎; 森本 健志
電子情報通信学会, 03 Sep. 2010, IEICE technical report, 110, 194, 59-62, Japanese, 0913-5685, 40017321994, AN1001312X - 人工衛星「まいど1号」による雷放電観測結果と電磁波の伝播特性
菊池 博史; 田中 竜太郎; 森本 健志; 牛尾 知雄; 河崎 善一郎; 青木 豊彦; 橋本 英一
15 Apr. 2010, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 4, 1, 108-109, Japanese, 1882-0549, 10026878131, AA12292204 - 人工衛星「まいど1号」からの雷観測
河崎 善一郎; 森本 健志; 菊池 博史
大阪大学工業会, Jul. 2009, 大阪大学工業会誌テクノネット, 545, 4-7, Japanese, 40017342463 - 小型衛星からの雷観測 : 東大阪衛星プロジェクト(3)打上げを控えて
森本 健志; 菊池 博史; 牛尾 知雄; 河崎 善一郎; 今村 博昭
10 Mar. 2009, 大気電気学会誌 = / Society of Atmospheric Electricity of Japan, 3, 1, 64-65, Japanese, 1882-0549, 10024924348, AA12292204
Lectures, oral presentations, etc.
- Modeling Atmosphere-Ionosphere Coupling on Gravity Waves during 2019 Typhoon 15 and 19 using FDTD Method
A. Setiawan; S. Hirai; H. Kikuchi; Y. Hobara
English, URSI GASS 2023, Peer-reviewed
Aug. 2023 - Total Lightning Distribution and Heavy Rainfall Characteristics Associated With Multicellular Thunderstorms
D. Mondal; Y. Hobara; H. Kikuchi; J. Lapierre
English, URSI GASS 2023, Peer-reviewed
Aug. 2023 - Observations of summer thunderstorms with X-band dual polarized phased array weather radar and LF/MF band lightning location system
H. Kikuchi; Y. Nakamura; E. Yoshikawa; T. Morimoto; T. Ushio; Y. Hobara
English, URSI GASS 2023, Peer-reviewed
Aug. 2023 - Prediction of Downbursts Using Machine Learning of Total Lightning and Ground Precipitation Data in Japan
Y. Hobara; S. Miyashita; H. Kikuchi; J. Lapierre; T. Ushio
English, URSI GASS 2023, Invited, Peer-reviewed
Aug. 2023 - Ideas for Radar Data Denoising and Fusion Based on Image Processing Techniques
D. Kitahara; Y. Wada; T. Mega; T. Enoto; E. Yoshikawa; H. Kikuchi; T. Ushio
English, URSI GASS 2023, Invited, Peer-reviewed
Aug. 2023 - Multi-Frequency Observation of Downward Terrestrial Gamma-ray Flashes in Winter Thunderstorms
Y. Wada; T. Morimoto; Y. Nakamura; T. Enoto; H. Kikuchi; E. Yoshikawa; T. Ushio
English, URSI GASS 2023, Invited, Peer-reviewed
Aug. 2023 - Observation of two downward terrestrial gamma-ray flashes with very-high-frequency waveform recordings
Y. Wada; T. Morimoto; Y. Nakamura; T. Enoto; H. Kikuchi; E. Yoshikawa; T. Ushio
English, American Geophysical Union 2022, Peer-reviewed
Dec. 2022 - Development of a 3-D Precipitation Nowcasting Method Using U-Net with Phased Array Radar Data
K. Kawashima; D. Kitahara; D. K. Kim; T. Mega; Y. Wada; T. Ushio; P. Baron; E. Yoshikawa; S. Hayashi; H. Kikuchi
English, American Geophysical Union 2022, Peer-reviewed
Dec. 2022 - Lower Ionospheric Fluctuations and Atmospheric Electric Field Immediately around Earthquake
K. Misu; M. Watanabe; H. Kikuchi; Y. Hobara
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - Statistical analysis of the Atmospheric Electric Field Fluctuations associated with Earthquakes in Japan
M. Watanabe; Y. Hobara; H. Kikuchi; R. Miyajima
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - Modeling Atmosphere-Ionosphere Coupling during Typhoon 15 Using FDTD Method
A. D. Setiawan; Y. Hobara; H. Kikuchi
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - Observations of Precipitation Cores with X-band Dual Polarized Phased Array Weather Radar and LF Band Lightning Location System
H. Kikuchi; Y. Nakamura; E. Yoshikawa; T. Morimoto; T. Ushio; Y. Hobara
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - Phased Array Weather Radar Observation and Application
T. Ushio; H. Kikuchi; Y. Wada; E. Yoshikawa
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - Thunderstorms and Total Lightning Characteristics Causing Heavy Precipitation in Japan: A Case Study
D. Mondal; Y. Hobara; H. Kikuchi
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - Calibration approach of ground-based weather radar network using dual-frequency precipitation radar on the global precipitation measurement
T. Goto; H. Kikuchi; Y. Nakamura; T. Ushio; T. Mega; Y. Hobara
Oral presentation, English, 2022 URSI-Japan Radio Science Meeting, International conference
Sep. 2022 - 気象用二重偏波フェーズドアレイ気象レーダと LF 帯雷放電標定装置を用いた夏季積乱雲の観測," 第100回日本大気電気学会
菊池博史; 及川夏依; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄; 芳原容英
Oral presentation, Japanese, 第100回日本大気電気学会
Jan. 2022 - High temporal resolution observations of Precipitation cores with Dual polarized phased array weather radar
H. Kikuchi; K. Oikawa; K. Nakamura; S. Uchida; T. Ushio; Y. Hobara
Oral presentation, English, URSI General Assembly and Scientific Symposium 2021, International conference
Sep. 2021 - Initial results of Hydrometeor Classification with X-band Dual-Polarized Phased Array Weather Radar
K. Oikawa; H. Kikuchi; K. Nakamura; T. Ushio; Y. Hobara
Poster presentation, English, URSI General Assembly and Scientific Symposium 2021
Sep. 2021 - Comparing the X-band multi-parameter phased array weather radar with a Doppler weather radar using a parabolic dish antenna
K. Asai; H. Kikuchi; T. Ushio; Y. Hobara
Oral presentation, English, URSI General Assembly and Scientific Symposium 2021
Sep. 2021 - Ground clutter mitigation of the Phased Array Weather Radar with digital beam forming technique
T. Ushio; H. Kikuchi; T. Mega; E. Yoshikawa; D. Kim
Oral presentation, English, URSI General Assembly and Scientific Symposium 2021
Sep. 2021 - Multi-Point Simultaneous Prediction Model for Electron Flux at Geostationary Orbits
H. Nomoto; Y. Hobara; H. Kikuchi; H. Iibuchi; M. Balikhin
Oral presentation, English, URSI General Assembly and Scientific Symposium 2021, International conference
Sep. 2021 - Global Distributions of Lightning Electrical Properties Obtained from International Space Station
Y. Hobara; H. Kikuchi; R. Kitamura; M. Sato; Y. Takahashi; T. Adachi; T. Ushio; M. Suzuki
Oral presentation, English, URSI General Assembly and Scientific Symposium 2021, International conference
Sep. 2021 - Total Lightning Activity associated with Extreme Meteorological Events in Japan a View from X-band Radar and Meteorological Satellite
Y. Hobara; H. Kikuchi; R. Aoyagi; M. Stock
Oral presentation, English, URSI General Assembly and Scientific Symposium 2021
Sep. 2021 - 台風に伴う大規模気象擾乱の電離圏への結合過程に関する研究
平井周; 芳原容英; 菊池博史; Michael Stock
Oral presentation, Japanese, JpGU Symposium 2021
Jun. 2021 - マルチパラメータフェーズドアレイ気象レーダを用いた3次元降水コアトラッキング手法の検討
浅井啓太郎; 菊池博史; 芳原容英; 牛尾知雄
Oral presentation, Japanese, JpGU Symposium 2021, Domestic conference
Jun. 2021 - LF帯3次元雷放電標定装置と二重偏波フェーズドアレイ気象レーダを用いた夏季積乱雲の観測事例
菊池博史; 亀井悠平; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄; 芳原容英
Oral presentation, Japanese, JpGU Symposium 2021
Jun. 2021 - 東南アジアにおけるエネルギー別落雷の時空間特性に関する初期解析
赤間 俊介; 平井 周; 芳原 容英; 菊池博史; Amir mohamed,Chandima Gomes; 塩川 和夫; Michael Stock
Oral presentation, Japanese, JpGU Symposium 2021
Jun. 2021 - 二重偏波フェーズドアレイ気象レーダを用いた2019年台風15号の3次元観測
菊池博史; 牛尾知雄; 芳原容英
Oral presentation, Japanese
Jan. 2021 - 二重偏波フェーズドアレイレーダを用いた粒子判別結果とTotal Lightning Networkによる雷観測結果の比較
及川夏依; 菊池博史; 芳原容英; 牛尾知雄
Oral presentation, Japanese
Jan. 2021 - 雷嵐特性のアンサンブル学習を用いた突風発⽣の予測
宮下志保; 平井周; 芳原容英; 菊池博史; Michael Stock
Oral presentation, Japanese
Jan. 2021 - 機械学習を用いた静⽌軌道上における電⼦フラックスの多点同時予測モデルの構築と評価
野本博樹; 芳原容英; 菊池博史; 飯淵隼人
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - 二重偏波フェーズドアレイ気象レーダの偏波パラメータに関する精度検証
浅井啓太郎; 菊池博史; 牛尾知雄; 芳原容英
Oral presentation, Japanese
Jan. 2021 - Ku帯広帯域偏波レーダによる2020年11⽉20⽇の降水観測
回日本大気電気学会
Oral presentation, Japanese
Jan. 2021 - 衛星搭載レーダGPM/DPRとフェーズドアレイレーダの⽐較−2016年と2019年の事例から−
後藤翼; 中村佳敬; 浅井啓太郎; 菊池博史; 妻鹿友昭; 牛尾知雄
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - 台⾵に由来する⼤気圏-電離圏結合に関する研究
平井周; 星野龍一; 芳原容英; 菊池博史; M. Stock
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - 関東圏における 3 次元雷放電標定装置を⽤いた初期観測結果
井悠平; 菊池博史; 芳原容英; 中村佳敬; 吉川栄一; 森本健志; 牛尾知雄
Oral presentation, Japanese
Jan. 2021 - 東南アジアにおける落雷エネルギー別雷嵐の時空間特性
赤間俊介; 平井周; 芳原容英; 菊池博史; Amir Izzani Mohamed,Chandima Gomes; 塩川和夫; Michael Stock
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - 地震に関連する⼤気電界変動
芳原容英; 宮島理紗; 渡辺真子; 松木翔; 菊池博史
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - 北海道⼥満別における地震に伴う⼤気電界変動の調査
渡辺真子; 芳原容英; 菊池博史; 松木翔
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - 地震に伴う⼤気電界と下部電離層擾乱の関連性に関する研究
松木翔; 宮島理紗; 芳原容英; 菊池博史
Oral presentation, Japanese, 第99回日本大気電気学会
Jan. 2021 - Meteorological conditions for lightning jump associated with downburst and heavy precipitation in Japan inferred from from X-band radar and Himawari-8 satellite data
芳原容英; 菊池博史; 青柳理紗子; Stock Michael
Oral presentation, English, JpGU Symposium 2020
May 2020 - Global distributions of lightning charge moment changes obtained from ISS
北村隆之介; 芳原容英; 菊池博史; 佐藤光輝; 高橋幸弘; 足立透; 牛尾知雄; 鈴木睦
Oral presentation, English, JpGU Symposium 2020
May 2020 - 気象用二重偏波フェーズドアレイレーダを用いた高時間分解能降雨観測
菊池博史; 及川夏衣; 中村賢人; 牛尾知雄; 芳原容英
Oral presentation, Japanese, JpGU Symposium 2020
May 2020 - MP-PAWRを用いた粒子判別と降雨推定の可能性の調査
及川夏依; 菊池博史; 中村賢人; 牛尾知雄; 芳原容英
Oral presentation, Japanese, JpGU Symposium 2020
May 2020 - Prediction of Spatio-temporal Variation for Electron Flux at Geostationary Orbits
野本博樹; 芳原 容英; 菊池博史; 飯淵隼人; バリヒンミハイル
Oral presentation, English, JpGU Symposium 2020
May 2020 - レーダネットワーク環境下における干渉波除去手法の提案
内田大平; 吉川栄一; 菊池博史; 妻鹿友昭; 牛尾知雄
Oral presentation, Japanese, 日本気象学会2019年度秋季大会
Nov. 2019 - Neural Networkを用いた偏波間位相差観測データスムージング手法の提案
末澤卓; 妻鹿友昭; 金東均; 菊池博史; 牛尾知雄
Oral presentation, Japanese
Nov. 2019 - 気象用フェーズドアレイレーダに対するニューラルネットワークを用いた適応型ビーム形成手法の検討
菊池博史; 牛尾知雄; 芳原容英
Oral presentation, Japanese, 日本気象学会2019年度秋季大会
Nov. 2019 - X帯二重偏波気象用フェーズドアレイレーダを用いた粒子判別手法の初期検討
中村賢人; 菊池博史; 妻鹿友昭; 牛尾知雄
Oral presentation, Japanese, 日本気象学会2019年度秋季大会
Nov. 2019 - フェーズドアレイ気象レーダーで観測された孤立積乱雲内の降水コアと雷放電との時空間比較
諸田雪江; 坪木和久; 佐藤晋介; 中川勝広; 牛尾知雄; 菊池博史
Oral presentation, Japanese, 日本気象学会2019年度秋季大会
Nov. 2019 - Application of MMSE Doppler spectrum estimator to an X-band Phased Array Weather Radar
N. Takizawa; E. Yoshikawa; H. Kikuchi; T. Mega; T. Ushio
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - An evaluation of the Multi Parameter Phased Array Weather Radar" in the39th International Conference on Radar Meteorology
T. Suezawa; H. Kikuchi; T. Mega; E. Yoshikawa; H. Hanado; S. Hayashi; T. Ushio
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Signal Processing for Suppressing Mutual Interferences in a Multiple Weather Radar Environment
T. Uchida; E. Yoshikawa; H. Kikuchi; N. Takizawa; T. Mega; T. Ushio
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Preliminary analysis to design C-band polarimetric phased array weather radar
K. Nakamura; H. Kikuchi; T. Mega; T. Ushio
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Spatial-Temporal Evolutions of Precipitation Cores and Lightning Activity Observed by Phased Array Weather Radars and BOLT
Y. Moroda; K. Tsuboki; S. Satoh; K. Nakagawa; T. Ushio; H. Kikuchi
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Evaluation of Rainfall Rate Estimated by Specific Differential Phase of Ku-band Broadband Radar
K. Asai; Y. Nakamura; E. Yoshikawa; H. Kikuchi; T. Mega; T. Ushio; T. Morimoto
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Application of adaptive beamforming to Dual Polarization Phased Array Weather Radar
S. Uchida; H. Kikuchi; E. Yoshikawa; T. Mega; T. Ushio
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Initial observations with X-band multi-parameter phased array radar in Japan
H. Kikuchi; T. Suezawa; T. Mega; T. Ushio
Oral presentation, English, the39th International Conference on Radar Meteorology, International conference
Sep. 2019 - Global Distributions of Lightning Electrical Characteristics Estimated by Optical Observation from International Space Station
R. Kitamura; Y. Hobara; H. Kikuchi; M. Sato; Y. Takahashi; T. Adachi; T. Ushio; M. Suzuki
Oral presentation, English, 2019 URSI-Japan Radio Science Meeting
Aug. 2019 - VHF Electromagnetic Observation of Lightning from Space ~Summary of Lightning Observations in Maid-1 and JEM-GLIMS Projects~
T. Morimoto; H. Kikuchi; T. Ushio; M. Sato
Oral presentation, English, 2019 URSI-Japan Radio Science Meeting
Aug. 2019 - Optical lightning observations with photometers on the International Space Station and Radio observations from the ground
H. Kikuchi; M. Sato; T. Ushio; T. Morimoto; A. Yamazaki; M. Suzuki; Z. Kawasaki
Oral presentation, English, 2019 URSI-Japan Radio Science Meeting
Aug. 2019 - 熱帯降雨観測衛星TRMMからの雷の光学観測を用いた雷の電気エネルギー導出に関する研究
平田浩大; 芳原容英; 菊池博史
Oral presentation, Japanese, JpGU Symposium 2019
May 2019 - Design of C-band polarimetric phased array weather radar
中村賢人; 菊池博史; 妻鹿友昭; 牛尾知雄
Oral presentation, Japanese, JpGU Symposium 2019
May 2019 - X帯二重偏波フェーズドアレイ気象レーダの初期観測結果とその検証
菊池博史; 末澤卓; 芳原容英; 牛尾知雄
Oral presentation, Japanese, JpGU Symposium 2019
May 2019 - Advantage and Disadvantage of the Phased Array Weather Radar
牛尾知雄; 妻鹿友昭; 菊池博史; 吉川栄一
Oral presentation, Japanese, JpGU Symposium 2019
May 2019 - Lightning charge moment changes deduced from highly sensitive ELF magnetic field observations in Southeast Asia
芳原容英; Amir Mohamed,Chandima Gomes; Wan Ismail Bin Ibrahim,Zulkurnain Abdul-Malek; Syahrun Nizam; Michael Stock; 塩川和夫; 菊池博史; 津田卓雄
Oral presentation, Japanese, JpGU Symposium 2019
May 2019 - Optical lightning observations with photometers on the International Space Station and Radio observations from the ground
H. Kikuchi; M. Sato; T. Ushio; T. Morimoto; A. Yamazaki; M. Suzuki; Z. Kawasaki
Oral presentation, English, 2019 URSI Asia-Pacific Radio Science Conference
Mar. 2019 - Initial observations of Multi-parameter phased array radar in Tokyo area
H. Kikuchi; T. Suezawa; A. Onuki; T. Ushio
Oral presentation, English, 2019 URSI Asia-Pacific Radio Science Conference
Mar. 2019 - 気象用二重偏波フェーズドアレイレーダに対する MMSE 規範を用いたアダプティブビームフォーミング
内田柊平; 吉川栄一; 妻鹿友昭; 牛尾知雄; 菊池博史
Oral presentation, Japanese, 第97回日本大気電気学会
Jan. 2019 - 気象レーダにおける適応型信号処理を用いたドップラースペクトル推定手法の検討
滝澤直也; 吉川栄一; 菊池博史; 妻鹿友昭; 牛尾知雄
Oral presentation, Japanese, 第97回日本大気電気学会
Jan. 2019 - 国際宇宙ステーションからの光学観測により推定された落雷電荷モーメントの全球分布
北村隆之介; 芳原容英; 菊池博史; 佐藤光輝; 高橋幸弘; 足立透; 牛尾知雄; 鈴木睦
Oral presentation, Japanese, 第97回日本大気電気学会
Jan. 2019 - 固定型気象用二重偏波フェーズドアレイレーダの降雨観測シミュレーション
中村賢人; 菊池博史; 妻鹿友昭; 牛尾知雄
Oral presentation, Japanese, 第97回日本大気電気学会
Jan. 2019 - Polarimetric Radar Observations with Multiparameter Phased-Array Radar (MP-PAWR) in the Tokyo Area
T. Ushio; H. Kikuchi
Poster presentation, English, 99th AMS Annual Meeting
Jan. 2019 - Interference Elimination via Minimum Mean Square Error on Phased-Array Weather Radar Using Angular Imaging Technique
T. Uchida; E. Yoshikawa; H. Kikuchi; N. Takizawa; T. Mega; T. Ushio
Poster presentation, English, 99th AMS Annual Meeting
Jan. 2019 - Evaluation of Precipitation Measurements with Multi Parameter Phased Array Weather Radar
T. Suezawa; A. Onuki; H. Kikuchi; T. Ushio
Poster presentation, English, American Geophysical Union Fall meeting 2019
Dec. 2018 - Application of MMSE Doppler Spectral Processing to X-band Phased Array Weather Radar
N. Takizawa; H. Kikuchi; T. Mega; E. Yoshikawa; T. Ushio
Poster presentation, English, American Geophysical Union Fall meeting 2019
Dec. 2018 - Rain rate estimates using phased array weather radar network in Kansai area, Japan
H. Kikuchi; T. Ushio
Poster presentation, English, American Geophysical Union Fall meeting 2019
Dec. 2018 - 気象用フェーズドアレイレーダネットワークにおける降雨強度推定精度の向上に関する検討
菊池博史; 牛尾知雄
Oral presentation, Japanese, 日本気象学会2018年度秋季大会
Nov. 2018 - Comparisons of optical lightning observations on JEM-GLIMS with radio observations from the ground
H. Kikuchi; M. Sato; T. Ushio; T. Morimoto; A. Yamazaki; M. Suzuki; Z. Kawasaki
Poster presentation, English, 16th international conference on atmospheric electricity, International conference
Jun. 2018 - Design of X-Band polarimetric phased array radar system
H. Kikuchi; T. Ushio; F. Mizutani; M. Wada; N. Takahashi
Oral presentation, English, AOGS 2018, International conference
Jun. 2018 - 2-Dimensional High-Quality Reconstruction of Compressive Measurements of Phased Array Weather Radar
Ryosuke Kawami; Akira Hirabayashi; Nobuyuki Tanaka; Motoi Shibata; Takashi Ijiri; Shigeharu Shimamura; Hiroshi Kikuchi; Gwan Kim; Tomoo Ushio
English, 2016 ASIA-PACIFIC SIGNAL AND INFORMATION PROCESSING ASSOCIATION ANNUAL SUMMIT AND CONFERENCE (APSIPA), IEEE, This paper proposes a compressive sensing method for the phased array weather radar (PAWR), which is capable of three-dimensional observation with high spatial resolution in 30 seconds. Because of the large amount of observation data, which is more than 1 gigabyte per minute, data compression is an essential technology to operate PAWR in the real world. Even though many conventional studies applied compressive sensing (CS) to weather radar measurements, their reconstruction quality should be further improved. To this end, we define a new cost function that expresses prior knowledge about weather radar measurements, i.e., local similarities. Since the cost function is convex, we can derive an efficient algorithm based on the so-called convex optimization techniques, in particular simultaneous direction method of multipliers (SDMM). Simulation results show that the proposed method outperforms the conventional methods for real observation data with improvement of 4% in the normalized error.
2016
2016 2016 - VHF radio observations of lightning discharges on JEM-GLIMS
Hiroshi Kikuchi; Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Atsushi Yamazaki; Makoto Suzuki
IEEE International Symposium on Electromagnetic Compatibility, © 2014 The Institute of Electronics, Information and Communication Engineer. Since 2012, the global lightning and sprite measurements (GLIMS) mission has been conducted on the exposed facility of Japanese experiment module (JEM-EF) of the international space station (ISS). In this mission, the VHF broadband digital interferometer (VITF) attached on JEM-EF is designed to estimate the direction of arrival of electromagnetic waves. The VITF has the bandwidth from 70 MHz to 100 MHz. The electromagnetic radiations from lightning discharges received by two antennas are digitized by the 2-channel AD converter. We introduce the outline of the mission and the VITF. The initial observational results with the VITF of the GLIMS mission are presented. The comparison of the results of arrival direction estimation of the VITF with optical observations using two methods which are an interferometry technic and the group delay characteristic of EM waves. The results agree with the position of the lightning emission captured by the LSI.
23 Dec. 2014
23 Dec. 2014- 23 Dec. 2014 - Development and Observation of the Phased Array Radar at X band
Tomoo Ushio; Shigeharu Shimamura; Ting Wu; Hiroshi Kikuchi; Eiichi Yoshikawa; Fumihiko Mizutani; Masakazu Wada; Shinsuke Satoh; Toshio Iguchi
English, 2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), IEEE, A new Phased Array Radar (PAR) system for meteorological application has been developed by Toshiba Corporation and Osaka University under a grant of NICT, and installed in Osaka University, Japan in 2012. The phased array radar system developed has the unique capability of scanning the whole sky with 100m and 10 to 30 second resolution up to 60 km. The system adopts the digital beam forming technique for elevation scanning and mechanically rotates the array antenna in azimuth direction within 10 to 30 seconds. The radar transmits a broad beam of several degrees with 24 antenna elements and receives the back scattered signal with 128 elements digitizing at each elements. Then by digitally forming the beam in the signal processor, the fast scanning is realized. After the installation of the PAR system in Osaka University, the initial observation campaign was conducted in Osaka urban area with Ku-band Broad Band Radar (BBR) network, C-band weather radar, and lightning location system. The initial comparison with C band radar system shows that the developed PAR system can observe the behavior of the thunderstorm structure in much more detail than any other radar system. The observed high temporal resolution images of the severe thunderstorm are introduced, showing the potential capabilities of the PAR system. The correlation coefficient of the reflectivity in PAR with C band radar ranges from 0.6 to 0.9 as a function of the distance from the PAR.
2014
2014 2014 - Global Lightning and Sprite Measurements from International Space Station
Tomoo Ushio; Mitsuteru Sato; Takeshi Morimoto; Hiroshi Kikuchi; Makoto Suzuki; Atsushi Yamazaki; Yasuhide Hobara; Toru Adachi
English, 2014 XXXITH URSI GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM (URSI GASS), IEEE, The Global Lightning and sprIte MeasurementS (GLIMS) on the International Space Station (ISS) is a mission to detect and locate optical transient luminous events (TLEs) and its associated lightning simultaneously from the non-sun synchronous orbit, and is scheduled to be launch from Japan in January, 2012 as part of the multi-mission consolidated equipment on Japanese Exposure Module (JEM). Our mission goals are (1) to detect and locate lightning and sprite within storm scale resolution over a large region of the Earth's surface along the orbital track of the ISS without any bias, (2) to clarify the generation mechanism of sprite, and (3) to identify the occurrence conditions of TLEs. To achieve these goals, two CMOS cameras, six Photometers, VLF receiver, and VHF interferometer with two antennas, are installed at the bottom of the module to observe the TLEs as well as causative lighting discharges at nadir direction during day and night time. Though the luminous events so-called sprite, elves and jets have been investigated by numerous researchers all over the world based mainly on the ground observations, some important problems have not been fully understood yet such as generation mechanisms of columniform fine structure and horizontal offset of some sprites from the parent lightning discharges. In the JEM-GLIMS mission, observations from our synchronized sensors are going to shed light on above-mentioned unsolved problems regarding TLEs as well as causative lighting discharges. In this presentation, the scientific background, instrumentation, project summaries and initial observation results are given.
2014
2014 2014 - VHF radio observations of lightning discharges on JEM-GLIMS
Hiroshi Kikuchi; Tomoo Ushio; Takeshi Morimoto; Mitsuteru Sato; Atsushi Yamazaki; Makoto Suzuki
English, 2014 INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY, TOKYO (EMC'14/TOKYO), IEEE, Since 2012, the global lightning and sprite measurements (GLIMS) mission has been conducted on the exposed facility of Japanese experiment module (JEM-EF) of the international space station (ISS). In this mission, the VHF broadband digital interferometer (VITF) attached on JEM-EF is designed to estimate the direction of arrival of electromagnetic waves. The VITF has the bandwidth from 70 MHz to 100 MHz. The electromagnetic radiations from lightning discharges received by two antennas are digitized by the 2-channel AD converter. We introduce the outline of the mission and the VITF. The initial observational results with the VITF of the GLIMS mission are presented. The comparison of the results of arrival direction estimation of the VITF with optical observations using two methods which are an interferometry technic and the group delay characteristic of EM waves. The results agree with the position of the lightning emission captured by the LSI.
2014
2014 2014 - Propagation characteristics of VHF waves recorded on the International Space Station
Hiroshi Kikuchi; Takeshi Morimoto; Tomoo Ushio; Mitsuteru Sato; Atsushi Yamazaki; Makoto Suzuki
International Conference on Atmospheric Electricity, ICAE 2014, © International Conference on Atmospheric Electricity, ICAE 2014 We has been conducted the lightning observation with four type sensors at the International Space Station (ISS). One of the sensors is very high frequency interferometer: VITF. The objective of the VITF is to locate the radiation source of received signals with two very high frequency interferometer (VHF) sensors attached on the ISS. Lightning and sprite imager: LSI is also one of the optical sensor for the observation of lightning and sprite. The LSI consists of two CMOS sensors. The image captured with the LSI gives us an information of lighting position. While the VITF has the two sensors. Although the VITF is able to estimate the direction of arrival estimation using the radio interferometric technique, we cannot locate the radiation source position. The location method are used as two direction of arrival (DOA) estimation techniques, which are the interferometric technique and based on the measurement of the group delay of the received signals. The combination of the two techniques gives us the two possible position of the radiation source when an altitude of a radiation source is assumed. The initial comparison with the optical lightning position captured with LSI are reported.
2014
2014 2014
Courses
- 宇宙通信工学
The University of Electro-Communications - 宇宙通信工学
電気通信大学 - 基礎科学実験A
The University of Electro-Communications - 基礎科学実験A
電気通信大学 - 情報通信工学実験Ｂ１
The University of Electro-Communications - 宇宙通信工学（学域）
The University of Electro-Communications - 宇宙通信工学（学域）
電気通信大学 - Information and Communication Engineering Laboratory B1
The University of Electro-Communications - 情報通信工学実験Ｂ１
電気通信大学
Affiliated academic society
Research Themes
Academic Contribution Activities
- IEEE Transactions on Radar Systems
Peer review etc, Peer review, Apr. 2024 - 日本気象学会
Peer review etc, Peer review, Jan. 2024 - Journal of atmospheric and oceanic technology.
Peer review, American Meteorological Society, Aug. 2023 - Bulletin of the American Meteorological Society
Peer review etc, Peer review, American Meteorological Society, Jun. 2023