BeiDou-reflectometry Sea Wind and Wave Retrieval System and Experiment
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摘要:
该文设计并实现了一种小型低功耗的北斗反射信号海风海浪反演系统，针对反演精度受卫星高度角影响较大的问题，提出高度角正弦值幂指数修正方法，且为降低风速突变对风速反演的影响，对风速反演模型进行了延时修正，有效提高了有效波高和风速的反演精度。为了进一步提高反演精度，提出多星联合观测和单边滤波的方法。北斗反射信号海风海浪探测试验结果表明：设计和实现的反演系统具备长期稳定运行和观测的性能；提出的反演模型和精度提升方法可以有效提高反演精度，有效波高和风速反演精度分别可达0.14 m和1.28 m/s，相比于Soulat等人提出的反演模型，分别提高了0.13 m和0.78 m/s。
Abstract:A low power and cost BeiDou-reflectometry used to retrieve Significiant Wave Height (SWH) and wind is designed and implemented. To improve the retrieval accuracy, a correction method based on the power function of the elevation angle sinusoidal and a delay correlation for the rapid change of wind speed is proposed. Moreover, combined observation of multi-satellite signals and single-side filtering for the observable are performed to improve further the retrieval accuracy. The experiment results of observating SWH and wind speed using reflected BeiDou signals show that designed and developed system could implement long-term and stable observation; the retrieval accuracies of SWH and wind speed retrieved by propsoed retrieval models and improvement methods of the retreival accuracy are 0.13 m and 1.28 m/s which are 0.13 m and 0.78 m/s higher than the methods proposed by Soulat et al.
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表 2 不同反演方法对比
反演模型 优化算法 有效波高误差
(m)风速误差
(m/s)反比例模型 – 0.27 2.06 – 0.21 1.43 指数模型(对风速
延时修正)多星观测 0.19 1.36 平滑滤波 0.16 1.30 多星&平滑 0.14 1.28 
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