【摘要】 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/Bei Dou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。更多还原

【Abstract】 In order to realize the application of multi-frequency multi-mode GNSS buoys in long-distance ocean tide measurement,this paper obtains tidal level information based on precision point positioning( PPP) data processing strategy,and uses pressure tide gauge as reference for GNSS buoy measurement. The sea surface is subjected to the Empirical M ode Decomposition( EM D),w hich filters out high-frequency w aves and noises,and obtains the tide level for accuracy analysis.The results show that multi-system can improve the accuracy of PPP solution tidal level. The maximum error of the difference betw een the tidal level of the GPS/GLONASS dual system and the GPS/GLONASS/BeiDou system is less than 18 cm and the RM SE is less than 6. 5 cm.Therefore,the multi-system PPP solution GNSS buoy height can achieve tidal level acquisition and monitoring aw ay from the coast,w hich can improve the efficiency of sea tide measurement.更多还原