ATLAS/ICESat-2 L3B Monthly Gridded Dynamic Ocean Topography V004

ATL19 contains monthly gridded dynamic ocean topography (DOT) over midlatitude, north-polar, and south-polar grids derived from the along-track ATLAS/ICESat-2 L3A Ocean Surface Height product (ATL12). Monthly gridded sea surface height (SSH) can be calculated by adding the monthly gridded DOT and the weighted average geoid height also provided. Both single beam and all-beam gridded averages are available: single beam averages are useful for identifying potential biases among the beams, and the all-beam averages are useful in physical oceanography. Simple averages, degree-of-freedom uncertainty averages, and averages interpolated to the center of grid cells are included, as well as uncertainty estimates.

ATL19数据集包含基于沿轨ATLAS/ICESat-2 L3A海洋表面高度产品（ATL12）生成的中纬度、北极及南极区域的逐月网格化动态海洋地形（dynamic ocean topography）。可通过将该逐月网格化动态海洋地形与配套提供的加权平均大地水准面高度相加，计算得到逐月网格化海面高度（sea surface height）。数据集同时提供单波束与全波束网格化平均值：单波束平均值可用于识别各波束间的潜在偏差，全波束平均值则适用于物理海洋学研究。此外还包含简单平均值、基于自由度的不确定性平均值、插值至网格单元中心的平均值，以及不确定性估计值。