GHRSST Level 3C North Atlantic Regional Subskin Sea Surface Temperature from the Visible Infrared Imaging Radiometer Suite (VIIRS) on board Suomi National Polar-orbiting Partnership (S-NPP) satellite for 2016-03-01 (NCEI Accession 0146769)

A regional Group for High Resolution Sea Surface Temperature (GHRSST) Level 3 Collated (L3C) dataset for the North Atlantic Region (NAR) based on retrievals from the Visible Infrared Imaging Radiometer Suite (VIIRS). This particular dataset is produced twice a day over anarea covering North-East Atlantic and the Mediterranean Sea in the framework of the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT) Ocean and Sea Ice Satellite Application Facility (OSI SAF) in France. The VIIRS instrument resides on the Suomi National Polar-orbiting Partnership (SNPP) satellite launched on 28 October 2011. VIIRS is a 22-band, multi-spectral scanning radiometer with a 3040-km swath width that builds on the heritage of the MODIS , AVHRR and SeaWIFS sensors for sea surface temperature (SST) and ocean color. For the infrared bands used for SST the effective pixel size is 740 meters at nadir and the pixel size variation across the swath is constrained to no more than 1600 meters at the edge of the swath. The L3C processing of this dataset remaps the L2 observations onto a 0.02 degree equal angle grid. A cloud mask (MAIA) is derived from the radiometric data. MAIA is a threshold based cloud mask originally developed for the AVHRR and upgraded and adapted to VIIRS processing. This dataset adheres to the GHRSST Data Processing Specification (GDS) version 2 format specifications.

本数据集为面向北大西洋区域（North Atlantic Region, NAR）的高分辨率海表温度小组（Group for High Resolution Sea Surface Temperature, GHRSST）级3拼接（Level 3 Collated, L3C）区域数据集，其数据基于可见光红外成像辐射仪套件（Visible Infrared Imaging Radiometer Suite, VIIRS）的反演结果构建。本数据集每日生成两次，覆盖东北大西洋与地中海海域，由位于法国的欧洲气象卫星开发组织（European Organization for the Exploitation of Meteorological Satellites, EUMETSAT）下属的海洋与海冰卫星应用设施（Ocean and Sea Ice Satellite Application Facility, OSI SAF）负责生产。VIIRS仪器搭载于2011年10月28日发射的Suomi国家极轨伙伴（Suomi National Polar-orbiting Partnership, SNPP）卫星。VIIRS是一款22波段多光谱扫描辐射仪，幅宽达3040千米，继承了用于海表温度（Sea Surface Temperature, SST）与海洋水色探测的中分辨率成像光谱仪（Moderate Resolution Imaging Spectroradiometer, MODIS）、先进甚高分辨率辐射仪（Advanced Very-High-Resolution Radiometer, AVHRR）及海洋宽视场传感器（Sea-viewing Wide Field-of-view Sensor, SeaWIFS）的技术积淀。针对用于SST探测的红外波段，其星下点有效像素尺寸为740米，且幅宽内的像素尺寸变化在边缘处不超过1600米。本数据集的L3C处理流程将L2级观测数据重投影至0.02度等角网格。研究团队从辐射测量数据中提取得到云掩膜（MAIA）：该算法为基于阈值的云掩膜方案，最初为AVHRR开发，后经升级并适配至VIIRS数据处理流程。本数据集符合GHRSST数据处理规范（GHRSST Data Processing Specification, GDS）2.0版的格式要求。