近海Ⅱ类水体的MODIS影像大气校正方法

基金项目: 国家973计划资助项目(2004CB318206)

详细信息

Atmospheric Correction of MODIS Imagery for Turbid Coastal Waters

¹ School of Remote Sensing and Information Engineering,Wuhan University,129 Luoyu Road,Wuhan 430079,China

Funds: 国家973计划资助项目(2004CB318206)

摘要: 利用光谱辐射传输理论对Gordon大气校正算法进行了修正,提出用解析的方法分离红外波段748nm和869 nm的离水辐射量与气溶胶的贡献,实现对近海Ⅱ类水体的大气校正,使之更适用于我国高悬浮泥沙和高气溶胶浓度海区。海上准同步实测数据表明,本文算法的校正精度比传统方法高,且能适用于影像中找不到理想Ⅰ类水体的情况,解决了近海水色数据大气校正问题。
- 水色遥感 /
- MODIS /
- 大气校正 /
- 近海Ⅱ类水体
Abstract: An amendatory algorithm is developed to correct the atmospheric effects for coastal waters by combining the Gordon’s atmospheric correction algorithm and the Arnone’s re-search results.Coastal waters can have significant reflectance in the 748 nm and 869 nm channels of MODIS or other instruments.The new method separates the water leaving radi-ance from the aerosol path radiance in these two channels by solving a set of simple algebraic equations,and the derived aerosol path radiance is then extrapolated to the expected chan-nels.The result demostrates that this atmospheric correction algorithm can achieve very high accuracy,and can be used to the areas where no caseⅠwaters existed or caseⅠwaters just covered by clouds.
- ocean colour remote sensing /
- MODIS /
- atmospheric correction /
- coastal caseⅡwa-ters