IMOS - Satellite Remote Sensing - NOAA20 - 01 day - Chlorophyll-a concentration (OCI model)

The NOAA20 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 OCI method (Hu et al 2012, doi: 10.1029/2011jc007395) recommended by the NASA Ocean Biology Processing Group and implemented in the SeaDAS processing software l2gen. The OCI algorithm is described at https://oceancolor.gsfc.nasa.gov/atbd/chlor_a/ (and links therein).

NOAA20卫星平台搭载了可见光红外成像辐射仪套件（VIIRS），该传感器可在多个波段观测海洋表层反射的太阳光。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，该物质绝大多数由浮游植物产生。目前存在多种用于估算叶绿素a浓度的反演算法，本数据集采用了由美国国家航空航天局（NASA）海洋生物学处理小组推荐、并在SeaDAS处理软件的l2gen模块中实现的OCI算法（Hu等，2012年，doi: 10.1029/2011jc007395）。OCI算法的详细说明可参见https://oceancolor.gsfc.nasa.gov/atbd/chlor_a/（及其内链）。