Near real time surface ocean velocity in the Bay of Biscay - Basque Country from Mai to September 2016

The data set consists of maps of total velocity of the surface current in the Southeastern Bay of Biscay averaged over a time interval of 1 hour around the cardinal hour. Surface ocean velocities estimated by this HF Radar(4.65 MHz) are representative of the upper 2-3 meters of the ocean. The main objective of near real time processing is to produce the best product from available data at the time of processing. Total velocities are derived using least square fit that maps radial velocities measured from individual sites onto a cartesian grid. The final product is a map of the horizontal components of the ocean currents on a regular grid in the area of overlap of two or more radar stations.

本数据集包含比斯开湾东南部海域表层海流总流速的空间分布图，数据为以整点为中心的1小时时间区间内的平均值。通过该4.65 MHz高频雷达（High Frequency Radar，HF Radar）估算得到的表层海流流速，代表了海洋上层2至3米的海流状况。近实时处理的核心目标，是在处理时刻基于可用数据生成最优的海洋流场产品。总流速通过最小二乘拟合方法推导得到：该方法将各观测站点测得的径向流速映射至笛卡尔网格坐标系。最终生成的产品为两个及以上雷达站观测重叠区域内，基于规则网格绘制的海流水平分量空间分布图。