A global marine bathymetry-derived gravity model SWOTBatGRA computed using the SWOT data

SWOTBatGRA is the first global marine bathymetry-derived gravity model computed using the Surface Water and Ocean Topography (SWOT) data. SWOTBatGRA focuses on enhancing short-wavelength signals at spatial scales finer than those resolved by altimetric gravity data. SWOTBatGRA maps the global marine gravity field (80°S~80°N, 0°E~360°E) at a spatial resolution of 1 arc-minute. The computation of SWOTBatGRA is based on the BathDNN25, developed by the University of Newcastle, Callaghan, Australia, using the SWOT gravity data (Salajegheh et al., 2025). SWOTBatGRA comprises five components: gravity anomaly (SWOTBatGRA_GRA.nc), gravity disturbance (SWOTBatGRA_GD.nc), quasi-geoid height (SWOTBatGRA_QG.nc), and north and east components of the deflection of the vertical (SWOTBatGRA_DOVN.nc and SWOTBatGRA_DOVE.nc).SWOTBatGRA是首个采用地表水与海洋地形（Surface Water and Ocean Topography，SWOT）数据构建的全球海洋测深衍生重力模型。该模型旨在强化空间尺度小于测高重力数据可分辨范围的短波重力信号，以1弧分的空间分辨率绘制了覆盖南纬80°至北纬80°、东经0°至360°范围的全球海洋重力场。 SWOTBatGRA的计算基于澳大利亚卡拉汉纽卡斯尔大学开发的BathDNN25模型，所用数据为SWOT重力数据（Salajegheh等，2025）。该模型包含五组数据产品：重力异常（SWOTBatGRA_GRA.nc）、重力扰动（SWOTBatGRA_GD.nc）、似大地水准面高（SWOTBatGRA_QG.nc），以及垂线偏差的北分量与东分量（分别对应文件SWOTBatGRA_DOVN.nc与SWOTBatGRA_DOVE.nc）。