Mr. Tomoko Koyama Profile

Tomoko Koyama

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Proceedings Article | 16 June 2003 Paper

Verification of GMS-5 VISSR infrared detectors

Tomoko Koyama, Donald Hillger

Proceedings Volume 4895, (2003) https://doi.org/10.1117/12.466534

KEYWORDS: Satellites, Infrared detectors, Calibration, Infrared imaging, Infrared radiation, Clouds, Meteorological satellites, Sensors, Radiometry, Infrared sensors

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It is essential to have qualitative information of a satellite instrument, images observed by the instrument, etc. The purpose of this presentation is to verify the degree of infrared (IR) detectors deterioration of the Visible Infrared Spin Scan Radiometer (VISSR) on the fifth Geostationary Meteorological Satellite (GMS-5). The International Satellite Cloud Climatology Project (ISCCP) calibration results and GMS-5 VISSR/IR raw counts of infrared channels were statistically studied. The degradation and uncertainty (noise level) were estimated from 1995 to 2001. As the result, the three GMS-5 infrared channels show no significant trend over the study period except the unstable conditions of the first year. In the end, a comparison between SST observations and brightness levels at cloud-free points is suggested as a possible verification technique.

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