一种非组合Galileo三频精密单点定位方法及精度分析

An Algorithm of Precise Point Positioning Based on Uncombined Galileo Triple-frequency Observations and Its Precision Analysis

同时播发多个频段的导航信号已经成为新一代GNSS卫星的显著特征与未来趋势。多频导航信号设计对提升GNSS精密单点定位精度及缩短初始化时间方面尤其具有重大意义。本文提出了一种利用非组合Galileo三频观测数据的PPP定位算法,采用实测Galileo三频数据按照该算法进行了解算,并采用传统双频算法对相同数据进行解算形成参照,结果显示Galileo三频PPP算法在定位精度及收敛速度上均优于传统双频PPP算法,这种优势在观测数据异常时更为显著。

Broadcasting multiple-frequency navigation signals has become a prominent feature and popular trend of the next generation GNSS satellites. The signal design of multiple-frequency GNSS is expected to benefit precise point positioning applications, especially in the aspect of improving its positioning accuracy and reducing its convergence time. In this paper, one PPP algorithm using uncombined triple-frequency Galileo observations is proposed. PPP solutions are carried out based on the proposed triple-frequency PPP algorithm and another set of solution is calculated based on the traditional double-frequency PPP algorithm to make a comparison. Results show that: the proposed triple-frequency Galileo PPP algorithm has a better performance of positioning accuracy and convergence time than that of the traditional double-frequency PPP algorithm. These advantages are more obvious during an application of abnormal observations.