SWOT Level 2 Nadir Altimeter Geophysical Data Record with Waveforms - SSHA Version D

The SWOT Level 2 Nadir Altimeter Geophysical Data Record (GDR) with Waveforms dataset produced by the Surface Water and Ocean Topography (SWOT) mission provides sea surface height, significant wave height and wind speed measurements from the Poseidon-3C nadir altimeter, a Jason-class dual frequency (Ku/C) altimeter. SWOT is a joint mission between NASA and CNES that launched on December 16, 2022. It aims to measure ocean surface topography with unprecedented resolution and accuracy, as well as map inland water bodies globally. The GDR dataset consists of discrete measurements for each half orbit along the ground track with sampling resolutions of approximately 6-km and 300-m at 1Hz and 20Hz, respectively. The data were processed using restituted auxiliary data and the Precise Orbit Ephemeris (POE). The data are available with latency of < 90 days and distributed in netCDF-4 file format.
<br>This collection is a sub-collection of its parent: https://podaac.jpl.nasa.gov/dataset/SWOT_L2_NALT_GDR_D

由表面水与海洋地形（Surface Water and Ocean Topography, SWOT）任务生成的带波形数据的二级星下点测高地球物理数据记录（Geophysical Data Record, GDR）数据集，源自Poseidon-3C星下点测高仪——一款Jason级双频（Ku/C波段）测高仪，可提供海面高度、有效波高与风速测量数据。SWOT是美国国家航空航天局（National Aeronautics and Space Administration, NASA）与法国国家空间研究中心（Centre National d'Études Spatiales, CNES）的联合任务，于2022年12月16日发射升空。其任务目标是以前所未有的分辨率与精度测量海洋表面地形，并实现全球内陆水体的测绘。GDR数据集包含沿地面轨迹的每个半轨的离散测量值，采样分辨率分别约为6公里（1Hz采样）与300米（20Hz采样）。该数据集采用复原辅助数据与精密轨道星历（Precise Orbit Ephemeris, POE）进行处理，数据延迟时间小于90天，以netCDF-4文件格式分发。
本数据集为其父数据集的子集合，链接为：https://podaac.jpl.nasa.gov/dataset/SWOT_L2_NALT_GDR_D