阵列式高频地波雷达矢量流长周期适用性比测试验数据分析

基于高频地波雷达长周期适用性比测试验数据,主要从以下3个方面系统分析国产阵列式高频地波雷达矢量流控测效果:(1)时间有效采样率和覆盖率的空间分布;(2)与反演的流速匹配的现场观测深度;(3)不同区域的探测精度.长周期的海流验证表明,雷达海流可以有效地反映有效探测区内表层海流及其时空变化,高精度区流速流向的均方根误差(RMS)分别为7.5～19.3cm/s和15.5°～33.7°,尤其是高精度区核心区域的RMS仅为7.5～10.1 cm/s和15.5°～28.5°.边缘区流速流向的RMS为16.1～25.8 cm/s和39.5°～40.7°,与国内外达到业务化运行要求的同类产品实际观测精度相当.

Data Analysis of Long-Term Applicability Test for Surface Currents by HF Surface Wave Radar

In order to evaluate the capability of current measurement, verification tests of the OSMAR071 HF surface wave radar system against in-situ measurements had been conducted during Jan 29 to Mar 15, 2013. The comprehensive evaluation includes that (1) effective sampling rate and space coverage; (2) the depth of the current measured by radar ; and (3) the precision of the currents measured by radar in different areas. The long-term verification suggests that the radar system can effectively retrieve the temporal and spatial variation of surface currents in the effective detection area. The error of the retrieved currents is relatively small, with a root mean square error (RMS) of 7.5-19.3 cm/s (speed) and 15.5-33.7° (direction) in high precision area, 7.5-10.1 cm/s and 15.5-28.5° in the core area within the high precision area, and 16.1-25.8 cm/s and 39.5-40.7° in other areas, which is comparable to the actual observing accuracy of similar products at home and overseas.