Poseidon-4 Altimetry Level 2 High Resolution (baseline version F06) - Sentinel-6 - Reprocessed

This is a reprocessed dataset at baseline F06, which is continued by the NRT/NTC data stream from 29/April/2022 onwards. The level-2 high resolution products contain the typical altimetry measurements, like the altimeter range, the sea surface height, the wind speed, significant wave height and all required geophysical corrections and related flags derived either from RAW or RMC, or the combination of both. Two measurement data files are available (standard and reduced), each with a different number of variables. The standard data file includes 1 Hz and 20 Hz measurements for the Ku- band as well as geophysical corrections at 1 Hz and some at 20 Hz. The reduced data file contains only 1 Hz measurements for the Ku- and C-bands as well as geophysical corrections at 1 Hz. Note that the HR data products only contain Ku-band measurements. These products are suitable for users seeking information on sea state and those creating downstream added value products from multiple altimeters. Particularly for those seeking the highest resolution measurements. Sentinel-6 is part of a series of Sentinel satellites, under the umbrella of the EU Copernicus programme. It is a collaborative Copernicus mission, implemented and co-funded by the European Commission, ESA, EUMETSAT and the USA, through NASA and the National Oceanic and Atmospheric Administration (NOAA).本数据集为基线版本F06的再处理数据集，其数据自2022年4月29日起由NRT/NTC数据流接续补充。二级高分辨率产品（Level-2 high resolution products）包含典型的测高仪观测数据，例如测高仪测距值、海面高度、风速、有效波高，以及所有必要的地球物理校正参数与相关质量标志位；这些参数既可从RAW或RMC数据单独推导，也可通过两者结合得到。本次提供两类观测数据文件（标准型与精简型），二者包含的变量数量各不相同。标准型数据文件包含Ku波段（Ku-band）的1Hz与20Hz观测数据，以及1Hz采样的地球物理校正参数，同时附带部分20Hz采样的校正参数。精简型数据文件仅包含Ku波段与C波段（C-band）的1Hz观测数据，以及1Hz采样的地球物理校正参数。请注意，HR数据产品仅包含Ku波段观测数据。本产品适用于需要获取海况信息的用户，以及基于多台测高仪开展下游增值产品开发的科研人员，尤其适合对最高分辨率观测数据有需求的用户。哨兵-6号（Sentinel-6）是欧盟哥白尼计划（EU Copernicus Programme）旗下的哨兵卫星系列成员之一。该任务为哥白尼计划下的国际合作项目，由欧盟委员会、欧洲空间局（ESA）、欧洲气象卫星开发组织（EUMETSAT）以及美国国家航空航天局（NASA）与美国国家海洋和大气管理局（NOAA）共同实施并提供联合资助。