Current velocity from PALACE float IOS578B

Velocity algorithm: backward differencing. Data have been checked by the WOCE Subsurface Float Data Assembly Center. See hdl:10013/epic.32931.d001 for further information.速度算法采用向后差分法。本数据集已通过世界海洋环流实验（World Ocean Circulation Experiment, WOCE）水下浮标数据组装中心的审核。更多详细信息请查阅hdl:10013/epic.32931.d001。