MODIS和GOCI卫星遥感反射率产品在浑浊海区交叉检验分析

对Geostationary Ocean Color Imager(GOCI)和Moderate Resolution Imaging Spectroradiometer(MODIS)传感器在中国渤海辽东湾海区的卫星大气校正算法开展评估工作。主要对比了GOCI和MODIS的412 nm,443 nm,488 nm,547 nm,678 nm波段的遥感反射率(Remote Sensing Reflectance:Rrs)。结果表明:GOCI的去云算法较严格,在卫星有效数据覆盖率方面差于MODIS;遥感反射率产品比对结果表明:GOCI和MODIS的遥感反射率产品有较好的线性相关,且GOCI反演值大于MODIS反演值;分区域的对比结果表明,MODIS和GOCI的遥感反射率差异随着水体的浑浊度增加而增大,GOCI需要开发适用于近岸水体的大气校正算法。

Cross-Check Analysis on MODIS and GOCI Satellite Remote Sensing Reflectances in Turbid Sea Areas

Assessment is conducted on the satellite atmospheric correction algorithms of Geostationary Ocean Color Imager (GOCI) products and Moderate Resolution Imaging Spectroradiometers (MODIS) applied in the Liaoning Gulf of the Bohai Sea. In this paper, the remote sensing reflectances (Rrs) of GOCI and MODIS are compared in the value bands of 412, 443, 488, 547 and 678 nm. The results show that the cloud removal algorithms of GOCI are more strict, and MODIS is better than GOCI in effective data cover. Comparison in remote sensing reflectances indicates that the Rrs products of MODIS and GOCI have good correlation linear, and the inversion value of GOCI is larger than that of MODIS. Contrast in diverse areas shows that the Rrs difference between MODIS and GOCI increases with rising turbidity of seawaters. The current GOCI atmospheric correction model needs further examination and adjustment over nearshore turbid waters.