SWOT Level 2 KaRIn Low Rate Sea Surface Height Data Product, Version C

The SWOT Level 2 KaRIn Low Rate Sea Surface Height Data Product from the Surface Water Ocean Topography (SWOT) mission provides global sea surface height and significant wave height observations derived from low rate (LR) measurements from the Ka-band Radar Interferometer (KaRIn). SWOT launched on December 16, 2022 from Vandenberg Air Force Base in California into a 1-day repeat orbit for the "calibration" or "fast-sampling" phase of the mission, which completed in early July 2023. After the calibration phase, SWOT entered a 21-day repeat orbit in August 2023 to start the "science" phase of the mission, which is expected to continue through 2025. The L2 sea surface height data product is distributed in one netCDF-4 file per pass (half-orbit) covering the full KaRIn swath width, which spans 10-60km on each side of the nadir track. Sea surface height, sea surface height anomaly, wind speed, significant waveheight, and related parameters are provided on a geographically fixed, swath-aligned 2x2 km2 grid (Basic, Expert, Windwave). The sea surface height data are also provided on a finer 250x250 m2 "native" grid with minimal smoothing applied (Unsmoothed). Please note that this collection contains SWOT Version C science data products. This dataset is the parent collection to the following sub-collections: https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_Basic_2.0 https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_WindWave_2.0 https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_Expert_2.0 https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_Unsmoothed_2.0水面地形测绘（Surface Water Ocean Topography, SWOT）任务的二级Ka波段雷达干涉仪（Ka-band Radar Interferometer, KaRIn）低速率海面高度数据产品，依托KaRIn的低速率（LR）测量数据生成，可提供全球海面高度与有效波高观测结果。SWOT卫星于2022年12月16日从加利福尼亚州范登堡空军基地发射升空，进入1天重复轨道执行任务的"校准"或"快速采样"阶段，该阶段于2023年7月初完成。校准阶段结束后，SWOT于2023年8月转入21天重复轨道，正式开启任务的"科学观测"阶段，预计将持续至2025年。 该二级海面高度数据产品以每个轨道弧段（半轨道）对应一个netCDF-4文件的形式分发，覆盖完整的KaRIn测绘幅宽，幅宽沿星下点轨迹两侧各延伸10至60千米。数据在地理固定、与幅宽对齐的2×2平方千米网格（基础型、专家型、风浪型）上，提供海面高度、海面高度异常、风速、有效波高及相关参数。此外，还提供了经过最小平滑处理的250×250平方米精细"原生"网格版本的海面高度数据（未平滑型）。 请注意，本数据集集合包含SWOT版本C科学数据产品。 本数据集为以下子数据集集合的父集： https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_Basic_2.0 https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_WindWave_2.0 https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_Expert_2.0 https://podaac.jpl.nasa.gov/dataset/SWOT_L2_LR_SSH_Unsmoothed_2.0