Measurement of soil backscattering with a 60-GHz scatterometer. - Hiromichi Yamasaki; Jun Awaka; Akira Takahashi; Ken'ichi Okamoto; Toshio Ihara (IEEE Trans. Geosci. Remote. Sens., 1992)

Development of an active radar calibrator for the TRMM precipitation radar. - Hiroshi Kumagai; Toshiaki Kozu; Makoto Satake; Hiroshi Hanado; Ken'ichi Okamoto (IEEE Trans. Geosci. Remote. Sens., 1995)

Development of precipitation radar onboard the Tropical Rainfall Measuring Mission (TRMM) satellite. - Toshiaki Kozu; Toneo Kawanishi; Hiroshi Kuroiwa; Masahiro Kojima; Koki Oikawa; Hiroshi Kumagai; Ken'ichi Okamoto; Minoru Okumura; Hirotaka Nakatsuka; Katsuhiko Nishikawa (IEEE Trans. Geosci. Remote. Sens., 2001)

Sampling simulation of five sun synchronous orbit satellites' group and TRMM rainfall estimation using radar-AmeDAS composites. - Yasuhisa Iida; Ken'ichi Okamoto (IGARSS, 2003)

Calculations of surface clutter interference with precipitation measurement from space by 35.5 GHz radar for Global Precipitation Measurement Mission. - Tetsuya Tagawa; Ken'ichi Okamoto (IGARSS, 2003)

Freezing height distribution in the tropics. - Merhala Thurai; Eri Deguchi; Toshio Iguchi; Ken'ichi Okamoto (Int. J. Satell. Commun. Netw., 2003)

Suppression of surface clutter interference with precipitation measurement from space by the Dual frequency Precipitation Radar. - Tetsuya Tagawa; Ken'ichi Okamoto; Hiroshi Hanado; Toshiaki Kozu (IGARSS, 2004)

Measurement of scattering coefficient dependence on soil moisture content and surface roughness by 35 GHz polarimetric scatterometer. - Tetsuya Tagawa; Ken'ichi Okamoto; Akira Higuchi; Tomoo Ushio; Hiroshi Hanado (IGARSS, 2004)

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 (IGARSS, 2005)

Development and observation of the broad-band radar for meteorological application. - Kazushi Monden; Tomoaki Mega; Tomoo Ushio; Ken'ichi Okamoto (IGARSS, 2005)

The global satellite mapping of precipitation (GSMaP) project. - Ken'ichi Okamoto; Tomoo Ushio; Toshio Iguchi; Nobuhiro Takahashi; Koyuru Iwanami (IGARSS, 2005)

Measurement of scattering properties of vegetation at Ka-band by 35GHhz polarimetric scatterometer. - Tetsuya Tagawa; Ken'ichi Okamoto; Tomoo Ushio (IGARSS, 2005)

Development of Over-ocean SSM/I Rain Retrieval Algorithm in the GSMaP Project. - Hiroshi Hashizume; Takuji Kubota; Kazumasa Aonashi; Shoichi Shige; Ken'ichi Okamoto (IGARSS, 2006)

Suppression of Surface Clutter Interference with TRMM Precipitation Radar Observation. - Tetsuya Tagawa; Ken'ichi Okamoto; Hiroshi Hanado; Toshiaki Kozu (IGARSS, 2006)

A Low-Power High-Resolution Broad-Band Radar Using a Pulse Compression Technique for Meteorological Application. - Tomoaki Mega; Kazushi Monden; Tomoo Ushio; Ken'ichi Okamoto; Zenichiro Kawasaki; Takeshi Morimoto (IEEE Geosci. Remote. Sens. Lett., 2007)

Global Precipitation Map Using Satellite-Borne Microwave Radiometers by the GSMaP Project: Production and Validation. - Takuji Kubota; Shoichi Shige; Hiroshi Hashizume; Kazumasa Aonashi; Nobuhiro Takahashi; Shinta Seto; Yukari N. Takayabu; Tomoo Ushio; Katsuhiro Nakagawa; Koyuru Iwanami; Misako Kachi; Ken'ichi Okamoto (IEEE Trans. Geosci. Remote. Sens., 2007)

Suppression of Surface Clutter Interference With Precipitation Measurements by Spaceborne Precipitation Radar. - Tetsuya Tagawa; Hiroshi Hanado; Ken'ichi Okamoto; Toshiaki Kozu (IEEE Trans. Geosci. Remote. Sens., 2007)

The GSMaP Precipitation Retrieval Algorithm for Microwave Sounders - Part I: Over-Ocean Algorithm. - Shoichi Shige; Tomoya Yamamoto; Takeaki Tsukiyama; Satoshi Kida; Hiroki Ashiwake; Takuji Kubota; Shinta Seto; Kazumasa Aonashi; Ken'ichi Okamoto (IEEE Trans. Geosci. Remote. Sens., 2009)

Surface reference normalized radar cross section over land for the improvement of the TRMM PR algorithm. - Ken'ichi Okamoto; Jun Komukai; Shoichi Shige; Takeshi Manabe (IGARSS, 2010)