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The Atmospheric Correction of ROCSAT-1 OCI Imagery - PartⅡ: OCITRAN-2
中華衛星一號海洋水色儀影像之大氣校正(Ⅱ)—OCITRAN-2
並列摘要
With the successful launch of the first scientific satellite of the Republicof China(ROCSAT-1)on 27 January 1999,Taiwan enters the era as asatellite data providing country.There are three scientific payloads on thesatellite.One of them is the Ocean Color Imager(OCI).OCI is a push-broom reflective imager for monitoring ocean colors.OCI has taken imagessince March 1999.Because there is no on-board calibrator on OCI,acomparison with Sea-viewing Wide Field-of-view Sensor(SeaWiFS)datawas performed in order to validate OCI data.Simultaneously in-situ observationsof optical properties and chlorophyll a concentration were alsocollected in waters adjacent to Taiwan for vicarious calibration.We appliedSeaWiFS atmospheric correction and bio-optical algorithms on OCIdata to derive normalized water-leaving radiance and chlorophyll a concentration.Results show that the chlorophyll a concentration derived fromOCI is generally larger than that derived from SeaWiFS.The correlationcoefficient is about 0.60 with a root-mean-squared(RMS)of difference ofchlorophyll a concentration of 0.10mg/m^(3).
延伸閱讀
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