北斗反射信號海風海浪反演系統(tǒng)與試驗
doi: 10.11999/JEIT180397
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1.
北京航空航天大學電子信息工程學院 ??北京 ??100083
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2.
勝利油田安全環(huán)保督查中心 ??東營 ??257000
BeiDou-reflectometry Sea Wind and Wave Retrieval System and Experiment
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1.
School of Electronic and Information Engineering, Beihang University, Beijing 100083, China
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2.
Safety and Environmental Supervision Center, Shengli Oil Field, Dongying 257000, China
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摘要:
該文設計并實現(xiàn)了一種小型低功耗的北斗反射信號海風海浪反演系統(tǒng)，針對反演精度受衛(wèi)星高度角影響較大的問題，提出高度角正弦值冪指數(shù)修正方法，且為降低風速突變對風速反演的影響，對風速反演模型進行了延時修正，有效提高了有效波高和風速的反演精度。為了進一步提高反演精度，提出多星聯(lián)合觀測和單邊濾波的方法。北斗反射信號海風海浪探測試驗結果表明：設計和實現(xiàn)的反演系統(tǒng)具備長期穩(wěn)定運行和觀測的性能；提出的反演模型和精度提升方法可以有效提高反演精度，有效波高和風速反演精度分別可達0.14 m和1.28 m/s，相比于Soulat等人提出的反演模型，分別提高了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 不同反演方法對比
反演模型 優(yōu)化算法 有效波高誤差
(m)風速誤差
(m/s)反比例模型 – 0.27 2.06 – 0.21 1.43 指數(shù)模型(對風速
延時修正)多星觀測 0.19 1.36 平滑濾波 0.16 1.30 多星&平滑 0.14 1.28 
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