基于SECH模型的高频地波雷达风场反演结果分析

Analysis of wind field retrieval results of HF ground-wave radar based on SECH model

基于多波束风向反演算法和经验模型风速反演算法,从实测的高频地波雷达数据中反演风向和风速,并和固定点的浮标数据进行比对。在风向的比对过程中分别采用SECH模型和COS模型,平均误差分别为32°和40°,在排除风速小于5 m/s的数据点后两模型对应的误差分别降低到20°和30°。该结果表明,基于SECH模型的风向反演结果要优于COS模型,并且在大风速的条件下地波风向的反演精度相对要高。对地波的风速反演结果和浮标测量结果进行了比对,平均误差在2.5 m/s左右。

Based on the multi-beam wind direction retrieval algorithm and the empirical model wind speed retrieval algorithm, the wind direction and wind speed are retrieved from the tested data of the HF ground-wave radar, and then compared with the data of the buoys at fixed points. The SECH model and the COS model are used for the wind direction retrieval, and the average errors are re- spectively 32% and 40% After the data points with the wind speed less than 5 m/s are excluded, the corresponding errors of the two models are reduced to 20% and 30%. The results indicate that the wind direction retrieval data with the SECH model are superior to those with the COS model. Be- sides, the retrieval precision of the wind direction is relatively high at high wind speed. The wind speed retrieval results and the measured data of the buoys are also compared with the average error of about 2.5 m/s.