This study evaluated the possibility of studying mesoscale surface circulation in coastal areas, as is the Gulf of Cádiz, Spain, using high-resolution altimetry data (20-Hz of posting rate) along with the use of wind and bottom friction ageostrophic corrections. Absolute cross-track surface zonal current velocities, derived from filtered along-track CryoSat-2 SIRAL-SARM Absolute Dynamic Topography (ADT) measurements, are compared with high-frequency radar (HFR) data in the coastal area of the Gulf of Cádiz. The filter strategy followed in this study for the altimetry data is dependent on the HFR measurements for each track. Absolute surface geostrophic velocities obtained from 20-Hz altimetry data agree well HFR further than 25 km from the coast. Close to land ([3–25] km) the ageostrophic component of the surface current (due to the wind drag and the bottom friction) needs to be considered in the altimeter data. On average, the correlation between altimetry and HFR improved from 0.61 (no correction) to 0.72 (correcting these effects). The root mean square error (RMSE) lowered from 12.54 cm·s⁻¹ to 7.35 cm·s⁻¹. Furthermore, it has also been demonstrated that corrected altimeter measurements are useful for the study of dynamics and patterns of coastal areas.

这项研究使用高分辨率测高数据（过帐速率为20 Hz）以及使用风和底部摩擦老化修正技术，评估了研究沿海地区（西班牙加的斯湾）中尺度地表环流的可能性。将经过滤波的沿CryoSat-2 SIRAL-SARM绝对动态地形（ADT）测量结果得出的跨轨表面绝对纬向流速与加的斯湾沿海地区的高频雷达（HFR）数据进行比较。本研究中针对测高仪数据采用的滤波策略取决于每个轨道的HFR测量。从20赫兹测高仪数据获得的绝对地表地转速度与离海岸25公里以外的HFR高度吻合。在海拔高度数据中，必须考虑到靠近陆地（[3–25] km）的地表电流（由于风阻和底部摩擦）的变质成分。平均而言，测高仪与HFR之间的相关性从0.61（无校正）提高到0.72（校正这些影响）。均方根误差（RMSE）从12.54 cm·s降低^-1至7.35 cm·s ^-1。此外，还已经证明，校正的高度计测量值对于研究沿海地区的动力学和模式很有用。