舟山海域高频地波雷达表层流探测试验

2015年4月7-30日，在浙江省舟山近海海域开展了“嵊山-朱家尖”小型阵列变频高频地波雷达系统的海上比测试验，通过雷达观测数据与定点ADCP海流资料的比对检验了地波雷达表层流探测性能。径向流比对结果显示，测点与雷达法向夹角越小，距离雷达距离越近，径向流比测结果越好，雷达探测的结果越可靠。嵊山站径向流与ADCP观测结果的各站总体平均误差为7.98 cm/s，平均均方根误差为15.34 cm/s，平均相关系数为0.89，朱家尖站径向流与ADCP观测结果的各站总体平均误差为6.24 cm/s，平均均方根误差为12.36 cm/s，平均相关系数为0.81。根据矢量流比对结果显示，矢量流速与ADCP观测结果的各站总体平均误差为4.82 cm/s，平均均方根误差为15.03 cm/s，平均相关系数为0.44。设置在嵊山、朱家尖两个雷达站双站探测的核心区域（两个雷达站连线的中垂线上，并且与两个雷达站构成一个近似直角三角形）的站点比测结果更加理想，当流速大于0.25 m/s时，对于核心区域平均后的流向均方根误差为24.9°。

Sea surface currents detection in Zhoushan Offshore sea by HF surface wave radar

From April 7 to 30, 2015, the National Marine Data and Information Service carried out an offshore comparison test of the ''Shengshan-Zhujiajian'' small array variable high frequency ground wave radar system in the offshore waters of Zhoushan, Zhejiang Province. The ground current detection performance of the radar was tested by comparing the radar observation data with the fixed point ADCP current data. According to the results of the radial current comparison, smaller angle between the measurement point and radar normal force and closer distance from the radar lead to more reliable radial flow ratio measurement results and the radar detection results. The overall average error of the radial flow and ADCP observations at Shengshan station for each station is 7.98 cm/s, the average root mean square error is 15.34 cm/s, and the average correlation coefficient is 0.89. The overall average error of the radial flow and ADCP observations at Zhujiajian Station for each station is 6.24 cm/s, the average root mean square error is 12.36 cm/s, and the average correlation coefficient is 0.81. According to the results of vector flow comparison, the overall average error of each station of vector flow velocity and ADCP observation is 4.82 cm/s, the average root mean square error is 15.03 cm/s,and the average correlation coefficient is 0.44. The comparison test results of the stations in the core area (located on the mid-pipeline of the line, connecting the two radar stations, forming an approximate right triangle with the two radar stations) of the two radar stations in Shengshan and Zhujiajian are more satisfactory. When the flow velocity is greater than 0.25 m/s, the root mean square error of the flow direction after averaging for the core area is 24.9°