Mr. Ryuichiro Nakayama Profile

Ryuichiro Nakayama

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Proceedings Article | 2 May 2016 Paper

Himawari-8/AHI latest performance of navigation and calibration

Tasuku Tabata, Akiyoshi Andou, Kotaro Bessho, Kenji Date, Ryo Dojo, Keita Hosaka, Nobutaka Mori, Hidehiko Murata, Ryuichiro Nakayama, Arata Okuyama, Masaya Takahashi

Proceedings Volume 9881, 98812J (2016) https://doi.org/10.1117/12.2240200

KEYWORDS: Calibration, Infrared radiation, Imaging systems, Image processing, Satellites, Image quality, Navigation systems, Infrared imaging, Denoising, Reflectivity

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The new-generation Himawari-8 geostationary meteorological satellite of the Japan Meteorological Agency (JMA) started operation in July 2015 after the completion of in-orbit testing and checking of the overall system. Himawari-8 features the new Advanced Himawari Imager (AHI), which has 16 bands and double the spatial resolution of its MTSAT-series predecessor satellites [1]. Full-disk imagery is obtained every 10 minutes, and regional observation at 2.5-minute intervals is also conducted. These significant improvements are expected to bring unprecedented levels of performance in nowcasting services and short-range weather forecasting systems. To leverage the full potential of the advanced imager, high precision in navigation and radiometric calibration is essential. This is estimated in off-line processes such as pattern matching for navigation and the Global Space-based Inter-Calibration System (GSICS) for radiometric calibration.

On 9 March 2016, JMA updated its ground processing system, including the image navigation and registration (INR) module, for further quality improvement. This update covered improvement of the band-to-band co-registration process for infrared bands, improvement of the resampling process, and implementation of a coherent noise reduction process. Results from the off-line processes showed that the update had improved Himawari Standard Data (HSD), which is Himawari-8/AHI L1B-equivalent data.

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