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Research on Extraction Tidal Accuracy of Multi-system GNSS Buoys
Author(s): 
Pages: 41-44
Year: Issue:  6
Journal: Hydrographic Surveying and Charting

Keyword:  精密单点定位后处理动态定位潮位测量经验模态分解法潮位精度;
Abstract: 为实现多频多模GNSS浮标在远距离海洋潮汐测量中的应用,基于精密单点定位(precision pointing positioning,PPP)数据处理策略获取潮位信息,以压力验潮仪为参考,对GNSS浮标测量海面高进行经验模态分解(empirical mode decomposition,EMD),滤去高频波浪和噪声,获取潮位进行精度分析.结果表明:多系统可以提高PPP解算潮位精度.GPS/GLONASS双系统和GPS/GLONASS/BeiDou三系统PPP提取潮位与验潮仪潮位差值的最大误差均小于18cm,RMSE小于6.5cm.因此,多系统PPP解算GNSS浮标海面高可以实现远离海岸的潮位获取与监测,能够提高海上潮位测量的效率.
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