Mr. Yoshihiko Okamura Profile

Yoshihiko Okamura

at Japan Aerospace Exploration Agency

SPIE Involvement:

Conference Program Committee | Author

Publications (26)

Proceedings Article | 10 October 2019 Presentation + Paper

Annual solar and LED calibration results and lessons learned of GCOM-C/SGLI-VNR

Tomoyuki Urabe, Yoshihiko Okamura, Kazuhiro Tanaka, Yuji Kosuge, Jun Yoshida, Takahiro Amano

Proceedings Volume 11151, 1115107 (2019) https://doi.org/10.1117/12.2534298

KEYWORDS: Calibration, Light emitting diodes, Satellites, Radiometry, Climate change, Environmental sensing, Climatology, Earth observing sensors, Atmospheric optics, Infrared radiation

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Proceedings Article | 23 October 2018 Paper

First year on-orbit calibration activities of SGLI on GCOM-C satellite

Kazuhiro Tanaka, Yoshihiko Okamura, Masaaki Mokuno, Takahiro Amano, Jun Yoshida

Proceedings Volume 10781, 107810Q (2018) https://doi.org/10.1117/12.2324703

KEYWORDS: Calibration, Satellites, Sensors, Thermography, Charge-coupled devices, Infrared radiation, Signal to noise ratio, Black bodies, Infrared imaging, Light emitting diodes

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Proceedings Article | 25 September 2018 Presentation + Paper

In-orbit commissioning activities results of GCOM-C /SGLI

Tomoyuki Urabe, Yoshihiko Okamura, Kazuhiro Tanaka, Masaaki Mokuno

Proceedings Volume 10785, 107850N (2018) https://doi.org/10.1117/12.2325572

KEYWORDS: Calibration, Diffusers, Signal to noise ratio, Light emitting diodes, Telescopes, Satellites, Space operations, Data acquisition, Charge-coupled devices, Radiometry

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Proceedings Article | 21 November 2017 Open Access

Design and breadboarding activities of the second-generation Global imager (SGLI) on GCOM-C

Yoshihiko Okamura, Kazuhiro Tanaka, Takahiro Amano, Masaru Hiramatsu, Koichi Shiratama

Proceedings Volume 10566, 105660D (2017) https://doi.org/10.1117/12.2308222

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Proceedings Article | 29 September 2017 Paper

Pre-launch instrument characterization results and in-orbit verification plan of GCOM-C/SGLI

Tomoyuki Urabe, Shigemasa Ando, Yoshihiko Okamura, Kazuhiro Tanaka, Masaaki Mokuno, Takahiro Amano, Koichi Shiratama, Jun Yoshida

Proceedings Volume 10423, 104230O (2017) https://doi.org/10.1117/12.2278181

KEYWORDS: Satellites, Climate change, Radiometry, Environmental sensing, Climatology, Atmospheric modeling, Earth observing sensors, Sensors, Systems modeling, Atmospheric optics

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The Global Change Observation Mission (GCOM) aims to establish and demonstrate a global, long-term satelliteobserving system to measure essential geophysical parameters to facilitate understanding the global water circulation and climate change, and eventually contribute to improving future climate projection through a collaborative framework with climate model institutions. GCOM consists of two polar orbiting satellite observing systems, GCOM-W (Water) and GCOM-C (Climate). The first satellite, GCOM-W with Advance Microwave Radiometer -2 (AMSR-2), was already launched in 2012 and has been observing continuously. The follower satellite, GCOM-C with Second Generation Global Imager (SGLI), will be launched in Japanese fiscal year 2017. SGLI enables a new generation of operational moderate resolution-imaging capabilities following the legacy of the GLI on ADEOS-II (Advanced Earth Observing Satellite-II) satellite. The SGLI empowers surface and atmospheric measurements related to the carbon cycle and radiation budget, with two radiometers of Visible and Near Infrared Radiometer (VNR) and Infrared Scanning Radiometer (IRS) which perform a wide-band (380nm-12μm) optical observation not only with as wide as 1150-1400km FOV (field of view) but also with as high as 250-500m resolution. Also, polarization and along-track slant view observation are quite characteristic of SGLI, providing the sensor data records for more than 28 standard products and 23 research products including clouds, aerosols, ocean color, vegetation, snow and ice, and other applications. Sensor instrument proto-flight tests including optical characterization tests such as radiometric and geometric were completed, and satellite system proto-flight tests have finished including thermal vacuum, vibration and acoustic test. In this paper, the pre-launch phase instrument characterization of SGLI flight model and status of GCOM-C satellite system flight model along with the overview of them will be described. Especially we focus on the pre-launch geometric and radiometric performance test results, in-orbit calibration activities and methodologies: VNR's on-board calibrator, IRS's on-board calibrator and calibration maneuver, and in-orbit verification plan during a commissioning phase lasting approximately 3 months.

Proceedings Article | 19 October 2016 Presentation + Paper

Radiometric performance of Second-generation Global Imager (SGLI) using integrating spheres

Taichiro Hashiguchi, Yoshihiko Okamura, Kazuhiro Tanaka, Yukinori Nakajima, Koichi Suzuki, Takashi Sakashita, Takahiro Amano

Proceedings Volume 10000, 1000007 (2016) https://doi.org/10.1117/12.2241955

KEYWORDS: Radiometry, Integrating spheres, Infrared radiation, Infrared imaging, Thermography, Lamps, Optical spheres, Barium, Calibration, Telescopes

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Proceedings Article | 12 October 2015 Paper

Development and pre-launch test status of Second Generation Global Imager (SGLI)

Yoshihiko Okamura, Kazuhiro Tanaka, Takahiro Amano, Koichi Shiratama, Tamiki Hosokawa

Proceedings Volume 9639, 96390I (2015) https://doi.org/10.1117/12.2193387

KEYWORDS: Sensors, Radiometry, Modulation transfer functions, Space telescopes, Telescopes, Thermography, Signal to noise ratio, Radio optics, Imaging systems, Pulmonary function tests

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Proceedings Article | 26 November 2014 Paper

Proto Flight Model (PFM) performance and development status of Visible and Near Infrared Radiometer (VNR) on the Second-generation Global Imager (SGLI)

Tatsuya Uchikata, Kazuhiro Tanaka, Yoshihiko Okamura, Shunji Tsuida, Takahiro Amano

Proceedings Volume 9264, 92640Q (2014) https://doi.org/10.1117/12.2068558

KEYWORDS: Polarization, Radiometry, Sensors, Telescopes, Thermography, Linear filtering, Infrared radiation, Satellites, Charge-coupled devices, Atmospheric modeling

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Proceedings Article | 19 November 2014 Paper

The development status of Second Generation Global Imager (SGLI), Infrared Scanning Radiometer (SGLI-IRS)

Kazuhiro Tanaka, Yoshihiko Okamura, Takahiro Amano, Tamiki Hosokawa, Tatsuya Uchikata

Proceedings Volume 9264, 92640G (2014) https://doi.org/10.1117/12.2073597

KEYWORDS: Sensors, Satellites, Calibration, Mirrors, Radiometry, Infrared radiation, Infrared imaging, Telescopes, Imaging systems, Infrared sensors

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Proceedings Article | 9 November 2012 Paper

Engineering model testing for SGLI IRS especially TIR radiometric data

Tamiki Hosokawa, Kazuhiro Tanaka, Yoshihiko Okamura, Takahiro Amano, Masaru Hiramatsu

Proceedings Volume 8528, 852818 (2012) https://doi.org/10.1117/12.979641

KEYWORDS: Thermography, Radiometry, Satellites, Sensors, Data modeling, Infrared radiation, Black bodies, Mirrors, Signal to noise ratio, Telescopes

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Proceedings Article | 4 November 2010 Paper

Operation concept of the second-generation global imager (SGLI)

Kazuhiro Tanaka, Yoshihiko Okamura, Takahiro Amano, Masaru Hiramatsu, Koichi Shiratama

Proceedings Volume 7862, 786209 (2010) https://doi.org/10.1117/12.869398

KEYWORDS: Calibration, Satellites, Light emitting diodes, Diffusers, Imaging systems, Infrared radiation, Sensors, Radiometry, Thermography, Telescopes

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Proceedings Article | 4 May 2010 Paper

The radiation tolerance of chalcogenide glasses

Masataka Naitoh, Haruyoshi Katayama, Masatomo Harada, Masahiro Suganuma, Yoshihiko Okamura, Yoshio Tange, Kenny Rogers, Yann Guimond

Proceedings Volume 7660, 766028 (2010) https://doi.org/10.1117/12.850146

KEYWORDS: Germanium, Chalcogenide glass, Tolerancing, Infrared radiation, Refractive index, Infrared cameras, Sensors, Microbolometers, Gamma radiation, Thermography

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Proceedings Article | 23 September 2009 Paper

Development status of the Second-Generation Global Imager (SGLI) on GCOM-C

Kazuhiro Tanaka, Yoshihiko Okamura, Takahiro Amano, Masaru Hiramatsu, Koichi Shiratama

Proceedings Volume 7474, 74740N (2009) https://doi.org/10.1117/12.830963

KEYWORDS: Sensors, Infrared telescopes, Telescopes, Signal to noise ratio, Thermography, Polarization, Imaging systems, Radiometry, Satellites, Infrared imaging

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Proceedings Article | 12 August 2009 Paper

Development of the Compact InfraRed Camera (CIRC) for wildfire detection

Haruyoshi Katayama, Masataka Naitoh, Masahiro Suganuma, Masatomo Harada, Yoshihiko Okamura, Yoshio Tange, Koji Nakau

Proceedings Volume 7458, 745806 (2009) https://doi.org/10.1117/12.825445

KEYWORDS: Infrared cameras, Infrared imaging, Thermography, Infrared radiation, Satellites, Microbolometers, Spatial resolution, Infrared detectors, Sensors, Infrared sensors

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Proceedings Article | 9 October 2008 Paper

Breadboarding activities of the Second-generation Global Imager (SGLI) on GCOM-C

Yoshihiko Okamura, Kazuhiro Tanaka, Takahiro Amano, Masaru Hiramatsu, Koichi Shiratama

Proceedings Volume 7106, 71060Q (2008) https://doi.org/10.1117/12.799475

KEYWORDS: Sensors, Signal processing, Calibration, Radiometry, Charge-coupled devices, Infrared radiation, Signal to noise ratio, Satellites, Thermography, Space telescopes

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Proceedings Article | 17 October 2007 Paper

Design challenge on forthcoming SGLI boarded on GCOM-C

Hiramatsu Masaru, Kazuhiro Tanaka, Yoshihiko Okamura, Takahiro Amano, Koichi Shiratama

Proceedings Volume 6744, 67440L (2007) https://doi.org/10.1117/12.738222

KEYWORDS: Sensors, Calibration, Polarization, Charge-coupled devices, Infrared detectors, Satellites, Radiometry, Mirrors, Telescopes, Thermography

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Proceedings Article | 21 October 2005 Paper

Development and observation results of the Earth observation system for stratospheric platform

Yoshihiko Okamura, Hiroko Imai, Marehito Kasahara, Shigeomi Yoshida, Yoshio Tange

Proceedings Volume 5978, 59780A (2005) https://doi.org/10.1117/12.631497

KEYWORDS: Sensors, Infrared sensors, Control systems, Calibration, Infrared radiation, Thermography, Spatial resolution, Vegetation, Polarization, Remote sensing

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Proceedings Article | 21 October 2005 Paper

A concept study for Japanese climate change observation mission: GCOM-C

Toshiyoshi Kimura, Kazuhiro Tanaka, Yoshihiko Okamura, Shigemitsu Fukui, Naoto Matsuura, Yoshio Tange, Yoshiaki Honda, Haruhisa Shimoda

Proceedings Volume 5978, 597809 (2005) https://doi.org/10.1117/12.631254

KEYWORDS: Sensors, Polarimetry, Polarization, Climate change, Thermography, Telescopes, Aerosols, Satellites, Calibration, Infrared sensors

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Proceedings Article | 11 January 2005 Paper

Development of the WAMS-VNIR instrument for SPF-II

Hiroko Matsuyama, Yoshihiko Okamura, Marehito Kasahara, Shigeomi Yoshida, Yoshio Tange

Proceedings Volume 5659, (2005) https://doi.org/10.1117/12.578742

KEYWORDS: Sensors, Polarizers, Polarization, Control systems, Infrared sensors, Optical filters, Radio optics, Data acquisition, Power supplies, Linear filtering

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Proceedings Article | 11 January 2005 Paper

Development of the WAMS-TIR instrument for SPF-II

Yoshihiko Okamura, Hiroko Matsuyama, Marehito Kasahara, Shigeomi Yoshida, Yoshio Tange

Proceedings Volume 5659, (2005) https://doi.org/10.1117/12.578734

KEYWORDS: Sensors, Infrared sensors, Calibration, Control systems, Thermography, Infrared radiation, Image quality, Black bodies, Data acquisition, Optical filters

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Proceedings Article | 4 November 2004 Paper

Concept study of multispectral imager for next generation

Toshiyoshi Kimura, Yoshio Tange, Kazuhiro Tanaka, Nobunari Itoh, Hiroko Matsuyama, Yoshihiko Okamura, Marehito Kasahara, Yoshiaki Honda

Proceedings Volume 5570, (2004) https://doi.org/10.1117/12.565448

KEYWORDS: Polarization, Imaging systems, Sensors, Climate change, Aerosols, Satellites, Telescopes, Climatology, Calibration, Atmospheric particles

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Proceedings Article | 5 November 2003 Paper

GLI early calibration results for oceanographic applications

Hiroshi Murakami, Kazuhiro Tanaka, Shigehisa Kurihara, Yoshihiko Okamura, Junichi Inoue, Jens Nieke, Ichio Asanuma, Hiroshi Yatagai, Yasushi Mitomi, Mayumi Yoshida, Riko Higuchi, Sachi Kawamoto, Kazuo Isono, Yasuhiro Senga

Proceedings Volume 5155, (2003) https://doi.org/10.1117/12.509820

KEYWORDS: Sensors, Calibration, Atmospheric corrections, Atmospheric modeling, Clouds, Algorithm development, Data modeling, Aerosols, Satellites, Thermography

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Proceedings Article | 16 June 2003 Paper

VIS-NIR and TIR sensors for Stratospheric Platform-II

Shigeomi Yoshida, Hiroko Matsuyama, Yoshihiko Okamura, Naoya Tomii, Yoshio Tange, Masao Moriyama, Yutaka Ogata

Proceedings Volume 4897, (2003) https://doi.org/10.1117/12.467597

KEYWORDS: Sensors, Infrared sensors, Optical filters, Telecommunications, Calibration, Thermography, Imaging systems, Staring arrays, Polarization, Infrared radiation

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Proceedings Article | 28 July 2000 Paper

FIS: far-infrared surveyor on board ASTRO-F (IRIS)

Hidenori Takahashi, Hiroshi Shibai, Mitsunobu Kawada, Takanori Hirao, Toyoki Watabe, Yasushi Tsuduku, Hirohisa Nagata, Hiroshi Utsuno, Yasushi Hibi, Shinya Hirooka, Takao Nakagawa, Hidehiro Kaneda, Shuji Matsuura, Tsuneo Kii, Shin'ichiro Makiuti, Yoshihiko Okamura, Yasuo Doi, Hiroshi Matsuo, Norihisa Hiromoto, Mikio Fujiwara, Manabu Noda

Proceedings Volume 4013, (2000) https://doi.org/10.1117/12.393984

KEYWORDS: Sensors, Spectroscopy, Mirrors, Satellites, Detector arrays, Optical filters, Linear filtering, Scanners, Telescopes, IRIS Consortium

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Proceedings Article | 20 June 2000 Paper

New balloon-borne telescope for far-infrared astronomy

Seiko Arimura, Hiroshi Shibai, Mitsunobu Kawada, Atsushi Ito, Makoto Tanaka, Shinya Hirooka, Yasuo Doi, Takao Nakagawa, Masanao Narita, Hidehiro Kaneda, Masahiro Tanaka, Takanao Tohya, Shin'ichiro Makiuti, Yoshihiko Okamura, Haruyuki Okuda, T. Rengarajan

Proceedings Volume 4014, (2000) https://doi.org/10.1117/12.389099

KEYWORDS: Telescopes, Sensors, Infrared telescopes, Electronics, Control systems, Mirrors, Infrared radiation, Fiber optic gyroscopes, Stars, Satellites

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