Riko Oki

According to our database, Riko Oki authored at least 40 papers between 2003 and 2022.

Collaborative distances:

• Dijkstra number of five.
• Erdős number of four.

2022

Calibration of the Dual-Frequency Precipitation Radar Onboard the Global Precipitation Measurement Core Observatory.

Takeshi Masaki, Toshio Iguchi, Kaya Kanemaru, Kinji Furukawa, Naofumi Yoshida, Takuji Kubota, Riko Oki

IEEE Trans. Geosci. Remote. Sens., 2022

Assessments of Doppler Velocity Errors of EarthCARE Cloud Profiling Radar Using Global Cloud System Resolving Simulations: Effects of Doppler Broadening and Folding.

Yuichiro Hagihara, Yuichi Ohno, Hiroaki Horie, Woosub Roh, Masaki Satoh, Takuji Kubota, Riko Oki

IEEE Trans. Geosci. Remote. Sens., 2022

Enhancing Precipitation Monitoring Using GPM Products: Integration with Ground-Based Radars.

Takuji Kubota, Yoichi Saito, Kinji Furukawa, Moeka Yamaji, Riko Oki

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2022

2020

Precipitation Extremes Monitoring Using the Near-Real-Time GSMaP Product.

Tomoko Tashima, Takuji Kubota, Tomoaki Mega, Tomoo Ushio, Riko Oki

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2020

Evaluation of Cloud Liquid Water Database Using Global CloudSystem Resolving Model for GPM/DPR Algorithms.

Takuji Kubota, Masaki Satoh, Takeshi Masaki, Toshio Iguchi, Shinta Seto, Tomoe Nasuno, Riko Oki

Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2020

2019

Gauge-Adjusted Global Satellite Mapping of Precipitation.

Tomoaki Mega, Tomoo Ushio, Takahiro Matsuda, Takuji Kubota, Misako Kachi, Riko Oki

IEEE Trans. Geosci. Remote. Sens., 2019

Observing System Simulation Experiment on The Accuracy of Global Satellite Mapping of Precipitation (GSMAP) by Future Small Precipitation Radar Constellation.

Moeka Yamaji, Takuji Kubota, Riko Oki

Proceedings of the 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019

Precipitation Extremes Monitoring Using Global Satellite Mapping of Precipitation (GSMaP) Products.

Tomoko Tashima, Takuji Kubota, Riko Oki

Proceedings of the 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019

2018

Development of A Statistical Method for Reducing Sidelobe Clutter in High Sensitivity Mode of GPM/Kapr.

Takuji Kubota, Toshio Iguchi, Takeshi Masaki, Naofumi Yoshida, Riko Oki

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

Scan Pattern Change Test Operations of the Dual-Frequency Precipitation Radar on the Global Precipitation Measurement Core Spacecraft.

Kinji Furukawa, Kosuke Yamamoto, Takuji Kubota, Riko Oki, Toshio Iguchi

Proceedings of the 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018

2017

Recent progress in global satellite mapping of precipitation (GSMAP) product.

Takuji Kubota, Kazumasa Aonashi, Tomoo Ushio, Shoichi Shige, Yukari N. Takayabu, Yoriko Arai, Tomoko Tashima, Misako Kachi, Riko Oki

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Study on measurement performance of future space-based Doppler wind lidar in Japan.

Shoken Ishii, Kozo Okamoto, Philippe Baron, Toshiyuki Ishibashi, Taichu Tanaka, Tsuyoshi Sekiyama, Takashi Maki, Takuji Kubota, Yohei Satoh, Daisuke Sakaizawa, Koji Yamashita, Kyoka Gamo, Satoshi Ochiai, Motoaki Yasui, Riko Oki, Masaki Satoh, Toshiki Iwasaki

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

Prime mission results of the dual-frequency precipitation radar on the global precipitation measurement core spacecraft.

Kinji Furukawa, Tomomi Nio, Riko Oki, Takuji Kubota, Toshio Iguchi

Proceedings of the 2017 IEEE International Geoscience and Remote Sensing Symposium, 2017

2016

Overview of the End-of-Mission Observation Experiments of Precipitation Radar Onboard the Tropical Rainfall Measuring Mission Satellite.

Nobuhiro Takahashi, Hiroshi Hanado, Kenji Nakamura, Kaya Kanemaru, Katsuhiro Nakagawa, Toshio Iguchi, Tomomi Nio, Takuji Kubota, Riko Oki, Naofumi Yoshida

IEEE Trans. Geosci. Remote. Sens., 2016

Radar Attenuation and Reflectivity Measurements of Snow With Dual Ka-Band Radar.

Masanori Nishikawa, Kenji Nakamura, Yasushi Fujiyoshi, Katsuhiro Nakagawa, Hiroshi Hanado, Haruya Minda, Sento Nakai, Toshiro Kumakura, Riko Oki

IEEE Trans. Geosci. Remote. Sens., 2016

Microphysical features of solid/melting particles by Ground-based direct observations for the GPM/DPR algorithm development.

Kenji Suzuki, Katsuhiro Nakagawa, Yuki Kaneko, Riko Oki, Kenji Nakamura

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

Recent advances of the TRMM PR beam-mismatch correction after the orbit boost.

Kaya Kanemaru, Takuji Kubota, Takeshi Masaki, Riko Oki, Kinji Furukawa, Toshio Iguchi, Hiroshi Hanado, Naofumi Yoshida

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

Precipitation rates estimated with GPM's Dual-frequency Radar.

Toshio Iguchi, Shinta Seto, Jun Awaka, Robert Meneghini, Takuji Kubota, V. Chandra, Naofumi Yoshida, Nozomi Kawamoto, Riko Oki

Proceedings of the 2016 IEEE International Geoscience and Remote Sensing Symposium, 2016

2015

Current status of GPM/DPR level 1 algorithm development and DPR calibration.

Takeshi Masaki, Takuji Kubota, Riko Oki, Kinji Furukawa, Masahiro Kojima, Takeshi Miura, Toshio Iguchi, Hiroshi Hanado, Hiroki Kai, Naofumi Yoshida, Tomohiko Higashiuwatoko

Proceedings of the 2015 IEEE International Geoscience and Remote Sensing Symposium, 2015

Development of a routine to reduce sidelobe clutter in GPM/KUPR-L2 algorithm.

Takuji Kubota, Takeshi Masaki, Toshio Iguchi, Shinji Urita, Naofumi Yoshida, Hiroshi Hanado, Riko Oki

Proceedings of the 2015 IEEE International Geoscience and Remote Sensing Symposium, 2015

A decadal variability of semi-global precipitation by TRMM PR.

Kaya Kanemaru, Takuji Kubota, Misako Kachi, Riko Oki, Toshio Iguchi, Yukari N. Takayabu

Proceedings of the 2015 IEEE International Geoscience and Remote Sensing Symposium, 2015

The orbital operations status of the dual-frequency precipitation radar on the global precipitation measurement core spacecraft.

Kinji Furukawa, Masahiro Kojima, Tomomi Nio, Toshiyuki Konishi, Riko Oki, Takeshi Masaki, Takuji Kubota, Yuki Kaneko, Misako Kachi, Toshio Iguchi, Hiroshi Hanado, Katsuhiro Nakagawa

Proceedings of the 2015 IEEE International Geoscience and Remote Sensing Symposium, 2015

2014

Evaluation of Precipitation Estimates by at-Launch Codes of GPM/DPR Algorithms Using Synthetic Data from TRMM/PR Observations.

Takuji Kubota, Naofumi Yoshida, Shinji Urita, Toshio Iguchi, Shinta Seto, Robert Meneghini, Jun Awaka, Hiroshi Hanado, Satoshi Kida, Riko Oki

IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2014

Development of level 1 algorithm of Dual Frequency Precipitation Radar (DPR) for the Global Precipitation Measurement (GPM).

Takeshi Masaki, Takuji Kubota, Riko Oki, Masahiro Kojima, Kinji Furukawa, Takeshi Miura, Hiroki Kai, Toshio Iguchi, Hiroshi Hanado, Naofumi Yoshida, Tomohiko Higashiuwatoko

Proceedings of the 2014 IEEE Geoscience and Remote Sensing Symposium, 2014

Recent improvements in the global satellite mapping of precipitation (GSMaP).

Misako Kachi, Takuji Kubota, Kazumasa Aonashi, Tomoo Ushio, Shoichi Shige, Munehisa Yamamoto, Tomoaki Mega, Riko Oki

Proceedings of the 2014 IEEE Geoscience and Remote Sensing Symposium, 2014

2013

Development of synthetic GPM/DPR data from TRMM/PR and evaluation of GPM/DPR level-2 "at-launch" algorithms using them.

Takuji Kubota, Naofumi Yoshida, Shinji Urita, Toshio Iguchi, Shinta Seto, Jun Awaka, Hiroshi Hanado, Satoshi Kida, Riko Oki

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

Reduction of discontinuity due to the orbit boost in TRMM Precipitation Radar product for climate studies.

Satoshi Kida, Takuji Kubota, Misako Kachi, Riko Oki, Toshio Iguchi, Yukari N. Takayabu

Proceedings of the 2013 IEEE International Geoscience and Remote Sensing Symposium, 2013

2012

Development of cloud liquid water database using global cloud-system resolving model for GPM/DPR algorithm.

Takuji Kubota, Masaki Satoh, Tomoe Nasuno, Shinta Seto, Toshio Iguchi, Riko Oki

Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

Development of precipitation retrieval algorithm over land for a satellite-borne microwave sounder.

Satoshi Kida, Takuji Kubota, Misako Kachi, Shoichi Shige, Riko Oki

Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, 2012

2011

Development of synthetic GPM/DPR data using KaPR sampling experiment of the TRMM/PR.

Takuji Kubota, Naofumi Yoshida, Shuji Shimizu, Riko Oki, Hiroshi Hanado, Toshio Iguchi

Proceedings of the 2011 IEEE International Geoscience and Remote Sensing Symposium, 2011

Comparison between TRMM/PR and AMeDAS ground rain gauge network in terms of annual rainfall.

Nozomi Kawamoto, Riko Oki, Shuji Shimizu

Proceedings of the 2011 IEEE International Geoscience and Remote Sensing Symposium, 2011

2010

Development of spaceborne radar simulator by NICT and JAXA using JMA cloud-resolving model.

Takuji Kubota, Hisaki Eito, Kazumasa Aonashi, Akihiro Hashimoto, Toshio Iguchi, Hiroshi Hanado, Shuji Shimizu, Naofumi Yoshida, Riko Oki

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2010

2009

Improved Correction of Beam Mismatch of the Precipitation Radar After Orbit Boost of the TRMM Satellite.

Tetsuya Tagawa, Hiroshi Hanado, Shuji Shimizu, Riko Oki

IEEE Trans. Geosci. Remote. Sens., 2009

A Long-term Trend Observed in TRMM/PR Monthly Rainfall Products and an Evaluation of Sampling Error by a Bootstrap Method.

Yasuhisa Iida, Takuji Kubota, Toshio Iguchi, Riko Oki

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2009

2008

Derivation of sub-footprint scale /Spl sigma/⁰ observed by TRMM Precipitation Radar.

Tetsuya Tagawa, Shuji Shimizu, Riko Oki

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2008

Evaluation of the Effect of the Orbit Boost of the TRMM Satellite on the PR Rain Estimates.

Shuji Shimizu, Toshio Iguchi, Riko Oki, Masafumi Hirose, Tetsuya Tagawa

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2008

2007

Modification of the beam mismatch correction algorithm.

Tetsuya Tagawa, Shuji Shimizu, Riko Oki

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2007

2006

Development and Validation of Spaceborne Dualfrequency Precipitation Radar for GPM.

Shuji Shimizu, Riko Oki, Misako Kachi, Masahiro Kojima, Toshio Iguchi, Kenji Nakamura

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2006

2005

Sampling simulation for estimating the sampling error of space-time average rain rate for TRMM and GPM mission.

Yasuhisa Iida, Ken'ichi Okamoto, Tomoo Ushio, Riko Oki

Proceedings of the IEEE International Geoscience & Remote Sensing Symposium, 2005

2003

Japan's progress for the global precipitation measurement (GPM).

Kenji Nakamura, Toshio Iguchi, Riko Oki

Proceedings of the 2003 IEEE International Geoscience and Remote Sensing Symposium, 2003