The System Cross-Calibration Between SeaWiFS and HY-1 COCTS

JIANG Xing-wei; NIU Sheng-li; TANG Jun-wu; SHAO Yan

doi:10.11834/jrs.200506100

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The System Cross-Calibration Between SeaWiFS and HY-1 COCTS
Issue 6, Pages: 680-687(2005)
Published：2005
DOI： 10.11834/jrs.200506100
稿件说明：

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[1]蒋兴伟,牛生丽,唐军武,邵岩.SeaWiFS与HY-1卫星COCTS的系统交叉辐射校正[J].遥感学报,2005(06):680-687. DOI： 10.11834/jrs.200506100.

JIANG Xing-wei, NIU Sheng-li, TANG Jun-wu, et al. The System Cross-Calibration Between SeaWiFS and HY-1 COCTS[J]. Journal of Remote Sensing, 2005, (6): 680-687. DOI： 10.11834/jrs.200506100.

摘要

海洋一号（HY-1）卫星是中国第一颗海洋环境遥感卫星。由于卫星上没有太阳定标装置

而且其上搭载的水色水温扫描仪（COCTS）一直存在漂移的问题

所以必须不断对其进行辐射校正

所述内容就是其辐射校正方法之一。美国宽视场水色扫描仪（SeaW iFS）提供了高精度的水色数据

如一类水体上的离水辐亮度及叶绿素浓度等被国际水色遥感界作为参照的基准。以SeaW iFS反演的归一化离水辐亮度和气溶胶参数对COCTS遥感器的辐射校正系数进行了系统校正。该方法可以对COCTS的定标系数进行长期监测。结果表明

校正后的COCTS水色数据产品精度得到了很大的提高。

Abstract

The HY-1 satellite is the first satellite for remote sensing of ocean environment in China.Because there is no onboard calibration facility and the coefficient of Chinese Ocean Color & Temperature Scanner（COCTS） has been drifting

calibrations and corrections must be carried out continually.One of the calibration methods is described in this paper.The Sea-viewing Wide Field-of-view Scanner（SeaWiFS） supplies highly accurate ocean color satellite data acknowleged internationally

its data for case I water

such as water-leaving radiance and chlorophyll concentration

etc.

is regarded as the standard by international fields on remote sensing of ocean color.Therefore

we can adopt the calibrate COCTS continually by the normalized water-leaving radiance and aerosol parameters derived from SeaWiFS.This method can also be used to monitor the long-term charge of calibration coefficient of COCTS.Our results indicate that the accuracy of the data retrieved from COCTS can be greatly improved after the cross-calibration.