IMOS - Satellite Remote Sensing - NOAA20 - 01 day - Optical Water Type (Moore et al 2009 algorithm)

The NOAA20 satellite platform carries a VIIRS sensor that observes sunlight reflected from within the ocean surface layer at multiple wavelengths. These measurements at discrete wavelengths represent the spectrum of light leaving the water surface, and the shape of the spectrum is characteristic of the water optical properties. Moore et al. (2009, RSE, 113, pp2424-2430, doi:10.1016/j.rse.2009.07.016) applied a clustering technique to spectra to identify 8 sets of discrete optical water types for data from the MODIS sensor. This product "owtd_csiro" is produced using a CSIRO implementation of the Moore et al. algorithm, and testing shows that it closely reproduces the results of the original Moore et al implementation in the NASA SeaDAS package. The CSIRO implementation was created because the implementation in SeaDAS has not been kept up to date, and to extend the product to the VIIRS sensor.

NOAA-20卫星平台搭载可见光红外成像辐射仪套件（VIIRS，Visible Infrared Imaging Radiometer Suite）传感器，可在多个波段观测海洋表层内反射的太阳光。这些离散波段下的测量值表征了离开水表面的光辐射光谱，而光谱形态是水体光学特性的特征标识。Moore等人（2009年，《Remote Sensing of Environment》，第113卷，第2424-2430页，doi:10.1016/j.rse.2009.07.016）将聚类技术应用于光谱分析，为中分辨率成像光谱仪（MODIS，Moderate Resolution Imaging Spectroradiometer）的观测数据确定了8类离散光学水体类型。本产品"owtd_csiro"采用澳大利亚联邦科学与工业研究组织（CSIRO，Commonwealth Scientific and Industrial Research Organisation）实现的Moore等人算法生成，测试结果显示，其可高度复现NASA SeaDAS工具包中原版Moore等人算法的运行结果。开发该CSIRO实现的原因在于，SeaDAS中的原有实现未得到持续更新维护，同时为了将该产品拓展适配至VIIRS传感器。