Search Results 1-20 of 123

  • Ground Validation of GPM DPR Algorithms by Hydrometeor Measurements and Polarimetric Radar Observations of Winter Snow Clouds: A Case Study on 4 February 2018

    Kamamoto Rimpei , Suzuki Kenji , Kawano Tetsuya , Hanado Hiroshi , Nakagawa Katsuhiro , Kaneko Yuki

    … <p>Two products from the Global Precipitation Measurement (GPM) Dual-frequency Precipitation Radar (DPR) algorithms, a flag of intense solid precipitation above the −10°C height ("flagHeavyIcePrecip") and a classification of precipitation type ("typePrecip") were validated by ground-based hydrometeor measurements and X-band multi-parameter (X-MP) radar observations of snow clouds on 4 February 2018. …

    SOLA 16(0), 115-119, 2020

    J-STAGE 

  • Detailed Analysis on Cumulus Cloud In Early Developing Stage by Using Phased Array Radar  [in Japanese]

    中北 英一 , 高尾 充政 , 新保 友啓 , 山口 弘誠 , 中川 勝広

    … Nakakita et al.(2015) developed a prediction system for torrential rainfall using vertical vorticity in a first echo using by X-band Polarimetric Doppler radar. … In this study, we analyzed the cumulous cloud with higher spational temporal resolution by using Phased Array Radar (PAR). …

    京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B 62(B), 432-440, 2019-09

    IR 

  • The Characteristics of the Heavy Rainfall Event in July 2018 and Global Warming  [in Japanese]

    中北 英一 , 小坂田 ゆかり , 山口 弘誠

    … We found a few hail in not so high clouds of this event compared with those of a typical back-building type heavy rainfall during Baiu season by analyzing the three-dimensional cloud information obtained from X-band multi-polarimetric Doppler radar. …

    京都大学防災研究所年報. A = Disaster Prevention Research Institute Annuals. A 62(A), 1-5, 2019-09

    IR 

  • DETAILED ANALYSIS ON CUMULUS CLOUD IN EARLY DEVELOPING STAGE BY USING Ka BAND RADAR AND PHASED ARRAY RADAR  [in Japanese]

    NAKAKITA Eiichi , TAKAO Mitsumasa , NIIBO Tomohiro , YAMAGUCHI Kosei , NAKAGAWA Katsuhiro

    <p> 発達初期ゲリラ豪雨内の渦管の時間発展をつぶさに解析することを目的として,Kaバンドレーダ,フェーズドアレイレーダを使った渦管構造の時空間的に詳細な解析を行った.降水粒子のない発達初期段階で,十分発達する積乱雲は内部に急激に増大する上昇流が発生することを示し,その際渦管が上空に延び,値は大きくなり,渦度が組織化することを示した.また,降水粒子がある段階の渦管を水平鉛直方向に密に解 …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 75(2), I_1171-I_1176, 2019

    J-STAGE 

  • Relationships between snow depth change and characteristics of falling snow particles in Toyama  [in Japanese]

    SARASHINA Hajime , YASUNAGA Kazuaki

    … 降雪による災害のリスクを減らすため,複合気象計やディスドロメーター,XバンドMPレーダーのデータを用いて,積雪深変化と降雪粒子特性との関連を調べた。 …

    Journal of Japan Society for Natural Disaster Science 38(S06), 201-212, 2019

    J-STAGE 

  • Polarimetric Radar Observation of the Melting Layer in a Winter Precipitation System Associated with a South-Coast Cyclone in Japan

    SHUSSE Yukari , MAESAKA Takeshi , KIEDA Kaori , IWANAMI Koyuru

    … <p> In this study, we describe the spatial distribution of the melting layer (ML) in a winter stratiform precipitation system associated with a south-coast cyclone (SCC) on 30 January 2015 over the Kanto Plain, Japan, using an X-band polarimetric radar at Funabashi operated by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). …

    Journal of the Meteorological Society of Japan. Ser. II 97(2), 375-385, 2019

    J-STAGE 

  • PREDICTABILTY AND DEVELOPING MECHANISM ON A LINE-SHAPED RAINBAND THAT OCCURRED AT NORTHERN PART OF KYUSHU IN 2017  [in Japanese]

    YAMAGUCHI Kosei , HORIIKE Yosuke , NAKAKITA Eiichi

    <p> 平成29年7月九州北部豪雨の線状降水帯に対して,アンサンブル予測実験およびデータ同化実験を行った.アンサンブル予測実験において,アンサンブル予測平均では約半量程度の過小予測であったが,30メンバー中2メンバーは高い予測精度を有していた.その2メンバーを解析したところ,背振山地の南側と北側から回り込む風の収束によって,背振山地を乗り越えてきた高湿気塊が持ち上げられて豪雨をもたらし …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74(5), I_277-I_282, 2018

    J-STAGE 

  • SPATIOTEMPORAL DISTRIBUTION OF RAINFALL IN MOUNT SAKURAJIMA BASED ON WEATHER RADAR

    SYARIFUDDIN Magfira , OISHI Satoru , NAKAMICHI Haruhisa , IGUCHI Masato

    … This paper discusses the fundamental aspect of spatial and temporal rainfall variability in Mt. Sakurajima by using X-band polarimetric (multi parameter) RAdar Information Network (XRAIN) related to debris flow occurrence. …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74(5), I_187-I_192, 2018

    J-STAGE 

  • Identifying Building Damage Patterns in the 2016 Meinong, Taiwan Earthquake Using Post-Event Dual-Polarimetric ALOS-2/PALSAR-2 Imagery

    Bai Yanbing , Adriano Bruno , Mas Erick , Koshimura Shunichi

    … Synthetic Aperture Radar remote sensing is a useful tool to rapidly grasp the near real-time building damage to areas affected by the earthquake. … Previous studies employed X-band single polarized high-resolution synthetic aperture radar imagery to identify building damage. … However, suitable X-band single polarized high-resolution synthetic aperture radar imagery is not always accessible. …

    Journal of Disaster Research 13(2), 291-302, 2018

    J-STAGE 

  • Imminent Nowcasting for Severe Rainfall Using Vertically Integrated Liquid Water Content Derived from X-Band Polarimetric Radar

    HIRANO Kohin , MAKI Masayuki

    … The system is based on the vertically integrated liquid water content (VIL), which is estimated from three-dimensional radar observations as well as the 1-minute-resolution rainfall map obtained from the X-band polarimetric (multi-parameter) RAdar Information Network (XRAIN), to predict rainfall amounts over 10 minutes periods that extend to 10-60 minutes into the future. …

    Journal of the Meteorological Society of Japan. Ser. II 96A(0), 201-220, 2018

    J-STAGE 

  • X-band Dual-Polarization Radar Observations of the Supercell Storm that Generated an F3 Tornado on 6 May 2012 in Ibaraki Prefecture, Japan

    SUZUKI Shin-ichi , MAESAKA Takeshi , IWANAMI Koyuru , SHIMIZU Shingo , KIEDA Kaori

    … <p> X-band dual-polarization (multi-parameter) radars were used to observe a supercell storm that generated an F3 tornado in Ibaraki Prefecture, Japan on 6 May 2012. … The observed data collected for this storm clearly exhibited the typical polarimetric features of a supercell storm, such as the <i>Z</i><sub>DR</sub> …

    Journal of the Meteorological Society of Japan. Ser. II 96A(0), 25-33, 2018

    J-STAGE 

  • Development and Societal Implementation of Quantitative Precipitation Measurements with X-band Polarimetric Weather Radar  [in Japanese]

    真木 雅之 , 上田 博 , 中北 英一

    天気 64(12), 849-872, 2017-12

  • Preliminary Analysis of Cumulonimbus Cloud Structure Using Multi Parameter Information of Ka-band Polarimetric Doppler Radar  [in Japanese]

    中北 英一 , 新保 友啓 , 佐藤 悠人 , 山口 弘誠 , 大東 忠保 , 篠田 太郎 , 坪木 和久

    … For earlier risk detection of torrential rain fall, some researchers use Ka-band cloud radar and they revealed it can detect cells 20minutes before X-band radar can. …

    京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B 60(B), 559-575, 2017-09

    IR 

  • Design and development of X-band polarimetric phased array weather radar  [in Japanese]

    喜田 智亮 , 牛尾 知雄 , 妻鹿 友昭 , 菊池 博史 , 嶋村 重治

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報 117(2), 75-79, 2017-04-20

  • Experimental Observations of Two Mountain Glaciers on the Eastern Slope of Mt. Tsurugi by Pi-SAR2 Airborne SAR

    FURUYA Masato , FUKUI Kotaro , IIDA Hajime , KOJIMA Shoichiro , MATSUOKA Takeshi

    … <p>We performed airborne synthetic aperture radar (SAR) observations at two glaciers (San'nomado and Komado glaciers) on the eastern slope of Mt. Tsurugi, Japan, in August and October 2013, and August 2014. … The Pi-SAR2 system used in this study consists of two X-band SAR antennas. … Full polarimetric observations were also performed, indicating significant changes over the glaciers from August to October that were largely due to the reduction in snow cover. …

    Bulletin of Glaciological Research 35(0), 7-17, 2017

    J-STAGE 

  • RESEARCH ON EARLY WARNING FOR MULTICELL CLUSTER STORM  [in Japanese]

    AZUMA Toshitaka , KATAYAMA Masayuki , NAKAKITA Eiichi

    ゲリラ豪雨と呼ばれる局地的豪雨が,首都圏で頻発している.道路交通管理の側面からも,災害リスクの事前回避に向けた先読み情報のニーズは高い.一方,長寿命で局地的豪雨をもたらすマルチセル型ストームは古くから注目されているものの,偏波レーダによる早期探知は未踏領域となっていた.そこで,本研究では京都大学防災研究所で開発されたゲリラ豪雨の早期探知の理論を土台とし,国土交通省により現業化されている高分解能偏波 …

    Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 73(4), I_223-I_228, 2017

    J-STAGE 

  • Surface Height Change Estimation Method Using Band-Divided Coherence Functions with Fully Polarimetric SAR Images

    OYAMA Ryo , KIDERA Shouhei , KIRIMOTO Tetsuo

    … <p>Microwave imaging techniques, in particular, synthetic aperture radar (SAR), are promising tools for terrain surface measurement, irrespective of weather conditions. … Given this background, the current study proposes a novel height change estimation method using a CCD model based on the Pauli decomposition of fully polarimetric SAR images. …

    IEICE Transactions on Communications E100.B(11), 2087-2093, 2017

    J-STAGE 

  • Verification of Quantitative Precipitation Estimation by MP radar network of Kochi University  [in Japanese]

    西井 章 , 佐々 浩司

    … Then, we are working to construct our own X-MP radar network in Kochi prefecture and to develop quasi-real time Quantitative Precipitation Estimation (QPE) algorithm. … The present study aims to verify the accuracy of QPE derived from 3 X-band MP radars (Asakura, Monobe, and Aki radars) by comparing with the data of rain gauge. …

    京都大学防災研究所年報 = DPRI annuals (61), 596-601, 2017

    IR 

  • Urban Area Extraction Using X-Band Fully Polarimetric SAR Imagery

    Susaki Junichi , Kishimoto Masaaki

    … Here, we present a method for extracting urban areas from X-band fully polarimetric synthetic aperture radar (SAR) data by reducing the effects of polarization orientation angle (POA). … The proposed classifier performs two classifications utilizing characteristics of X-band scattering in land cover. … The other classification uses polarimetric coherence between SHH} and SVV}. …

    IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 9(6), 2592-2601, 2016-06-01

    IR 

  • The Case Study Report of the New X-band Dual-polarimetric Radar in Sewerage Facilities  [in Japanese]

    星野 晃一 , 柏木 俊治 , 田辺 啓

    EICA : journal of EICA : 環境システム計測制御学会誌 21(2・3), 114-116, 2016

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