AVHRR Pathfinder version 5.2 level 3 collated (L3C) global 4km sea surface temperature for 1981-2012

The AVHRR Pathfinder Version 5.2 Sea Surface Temperature dataset (PFV52) is a collection of global, twice-daily 4km sea surface temperature data produced in a partnership by the NOAA National Oceanographic Data Center and the University of Miami's Rosenstiel School of Marine and Atmospheric Science. PFV52 was computed from data from the AVHRR instruments on board NOAA's polar orbiting satellite series using an entirely modernized system based on SeaDAS. This system incorporates several key changes from Versions 5.0 and 5.1 of Pathfinder, including the use of an entirely new land mask, a modified grid, and the inclusion of sea ice, wind speed, and aerosol ancillary data to support the use of the SST data. Importantly, PFV52 data are provided in netCDF-4 (classic model, with internal compression and chunking) and are nearly 100% compliant with the GHRSST Data Specification Version 2.0 for L3C products. These data deviate from that standard only in that sses_bias, sses_standard_deviation, and sst_dtime variables are empty. PFV52 data were collected through the operational periods of the NOAA-7 through NOAA-19 Polar Operational Environmental Satellites (POES), and are available back to 1981. Data for all years are available as separate NODC accessions.

AVHRR Pathfinder 5.2版海表温度数据集（PFV52）是由美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA）国家海洋数据中心与迈阿密大学罗森斯蒂尔海洋与大气科学学院联合制作的全球每日两次、空间分辨率为4公里的海表温度数据集合集。PFV52以NOAA极轨卫星系列搭载的AVHRR仪器获取的数据为数据源，通过一套以SeaDAS为基础的全新现代化计算系统生成。相较于Pathfinder 5.0与5.1版，该系统实现了多项关键改进：采用全新的陆地掩膜、优化的网格系统，并纳入海冰、风速和气溶胶辅助数据以提升海表温度数据的可用性。值得注意的是，PFV52数据以netCDF-4格式（经典模型，支持内部压缩与分块存储）进行分发，且几乎完全符合全球高分辨率海表温度工作组（Group for High Resolution Sea Surface Temperature，GHRSST）2.0版数据规范中关于L3C产品的要求。该数据集仅在三个变量上偏离该标准：sses_bias、sses_standard_deviation与sst_dtime均为空值。PFV52的数据覆盖了NOAA-7至NOAA-19极轨环境卫星（Polar Operational Environmental Satellites，POES）的全部运行周期，时间跨度可追溯至1981年。各年份的数据均以独立的NODC入库条目形式提供。