岸基多星多参数北斗GEO反射信号海面风速反演

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.