基于GPS信噪比观测值的水位反演研究

Research on water level inversion based on GPS SNR data

介绍了利用GPS信噪比(SNR)数据反演水位变化的原理.选取Calcasieu Pass GPS站的SNR数据反演水位变化,并与附近验潮站监测数据进行对比,两者表现出很好的一致性,两者的相关系数优于0.80,RMSE在8 cm左右,验证了基于GPS SNR数据监测海平面变化的可行性和可靠性,通过不同时段和时长的试验分析,证明了岸基GPS站可连续对水位进行监测.

The principle of inversion of water level changes using GPS signal-to-noise ratio data is described in detail.Comparing the water level change with the signal-to-noise ratio of the Calcasieu Pass GPS station and the data monitored by the tide station,they show good consistency.The correlation coefficient is better than 0.96,and the RMSE is about 8 cm.The results further validate the feasibility and reliability of monitoring sea level changes based on GPS signal-to-noise ratio data.Through the test and analysis of different periods and time length,it is proved that the shore based GPS station can continuously monitor the water level.