IMOS - Satellite Remote Sensing - SNPP - 01 day - Chlorophyll-a concentration (GSM model)

The SNPP satellite platform carries a VIIRS sensor that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These multi-spectral measurements are used to infer the concentration of chlorophyll-a (Chl-a), most typically due to phytoplankton, present in the water. There are multiple retrieval algorithms for estimating Chl-a. These data use the Garver-Siegel-Maritorena (GSM) method implemented in the SeaDAS processing software l2gen and described in “Chapter 11, and references therein, of IOCCG Report 5, 2006, (http://ioccg.org/wp-content/uploads/2015/10/ioccg-report-05.pdf).

SNPP卫星平台搭载可见光红外成像辐射仪（Visible Infrared Imaging Radiometer Suite, VIIRS），该传感器以多波段光谱观测海洋表层内反射的太阳光。此类多光谱测量数据被用于反演水体中叶绿素a（Chl-a）的浓度——该物质通常由浮游植物所产生。当前存在多种用于估算叶绿素a浓度的反演算法。本数据集采用SeaDAS处理软件l2gen中实现的Garver-Siegel-Maritorena（GSM）算法，其相关说明详见2006年《国际海洋颜色协调组（International Ocean-Colour Coordinating Group, IOCCG）报告第5号》第11章及其中引用的参考文献（http://ioccg.org/wp-content/uploads/2015/10/ioccg-report-05.pdf）。