岸基多星多参数北斗GEO反射信号海面风速反演

开展北斗GEO卫星B3I信号岸基近岸海域海面风速反演研究.在GNSS反射信号相干时间和归一化时延波形面积两个观测量的基础上，本文提出了主成分分析和线性无偏最小方差的多星多参数海面风速反演方法.为了验证北斗GEO卫星B3I信号反演海面风速以及所提方法的有效性，在山东东营青东五验潮站开展了外场试验.试验结果表明反射信号的相干时间能够提供比波形面积更好的反演性能；多星多参数的反演结果比单星单参数的更好；线性无偏最小方差能够提供精度为1.15 m/s的最佳反演结果. 

Multi-Satellite and Multi-Parameter Observation Based on Reflected Signals from Beidou GEO Satellites for Coastal Wind Speed

In order to explore the retrieval of coastal wind speed, a multi-satellite and multi-parameter observation was proposed based on reflected signals from BeiDou GEO satellites. According to the coherent time of the reflected signal of Global Navigation Satellite System (GNSS) and the area of the normalized delay waveform, the new observation method was carried out based on Principal Component Analysis (PCA) and Linear Unbiased Minimum Variance (LUMV). To demonstrate the retrieval effect of the wind speed with the proposed method, experiments were carried out in Qingdong-5 Tide Well of Dongying city in Shandong province. The experimental results show that compared with the waveform area measure, coherent time measure can express better retrieval performance. Comparing with single-satellite and single-parameter observation, the multi-satellite and multi-parameter observation can provide better result, showing the best precision of 1.15 m/s with LUMV estimator.