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 2016-02-21 (NCEI Accession 0154475)

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.本数据集为针对北大西洋区域（North Atlantic Region, NAR）的高分辨率海表温度工作组（Group for High Resolution Sea Surface Temperature, GHRSST）三级整合（Level 3 Collated, L3C）数据集，基于可见红外成像辐射计套件（Visible Infrared Imaging Radiometer Suite, VIIRS）的反演结果构建。该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）海洋与海冰卫星应用设施（Ocean and Sea Ice Satellite Application Facility, OSI SAF）负责研发生产。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）卫星之上。VIIRS是一款22波段多光谱扫描辐射计，幅宽达3040千米，继承了MODIS、AVHRR及海洋宽视场传感器（SeaWIFS）在海表温度（Sea Surface Temperature, SST）与海洋水色领域的技术积淀。针对海表温度反演所用的红外波段，其星下点有效像素尺寸为740米，且幅宽范围内的像素尺寸最大偏差不超过幅边处的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度等角网格中。从辐射测量数据中可提取云掩膜（MAIA）。MAIA是一款基于阈值的云掩膜算法，最初为AVHRR传感器开发，后经升级适配至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。