北斗系统3个频段信号反演潮位高度技术研究

全球性海平面的上升可能会对沿海地区的社会活动产生重大的影响，因此，监测和了解海平面变化显得非常重要。本文依据信号的信噪比（SNR）测高原理，通过分析2014年9月5-31日，在中国浙江省舟山市的大洋山岛上所收集的北斗3个频段的卫星信号，成功地实现潮位高度反演。其中，B1频段反演结果的标准差（STD）为33.82 cm，相关系数为95.98%；B2频段反演结果的STD为38.48 cm，相关系数为94.68%；B3频段的反演结果的STD为34.56 cm，相关系数为96.08%。这是首次关于北斗3个频段信号的SNR测高研究。本次实验论证了该方法在北斗系统上的可行性，同时对北斗B1、B2、B3频段的信号在SNR测高中的性能作了对比分析。

Detection of tide change using BeiDou three frequency signals

Rising sea-level has significant impact on coastal societies. Therefore, it is of great importance to monitor and understand how local sea level is changing. This paper used BeiDou three frequency signals which were received from Dayangshan, Zhejiang, China during September 5, 2014 to September 31, 2014, to successfully achieve the purpose of detection of tide change. Among the altimetry results, the STD (the standard deviation of the residual between the altimetry and tide) of B1 frequency is 33.82 cm and its correlation coefficient is 95.98%; the STD of B2 frequency is 38.48 cm and its correlation coefficient is 94.68%; the STD of B3 frequency is 34.56 cm and its correlation coefficient is 96.08%. This is the first study about altimetry of SNR observation using BeiDou three frequency signals. By analyzing the experiment data, it can verify its feasibility that BeiDou three frequency signals to detect the tide change. Meanwhile, each of the performance of BeiDou three frequency signals was analyzed in this paper.