摘要
对TurboEd it算法的3个关键环节进行改进:宽巷模糊度和方差考虑不同弧段、弧段长度、粗差影响等因素;两类组合观测值均通过探测连续3个历元的状态来决定当前历元是否为周跳或粗差;设计了一个基于滑动窗口的拟合模型,该模型更符合无周跳的Geom etry-Free(G-F)组合观测值的平滑时间序列特征,同时对划分的G-F弧段可进行二次处理,进一步剔除小粗差。实验表明,该算法可探测并精确修复等周、等距和连续周跳,对连续粗差和表现并不明显的粗差,亦能有效剔除。
Three improvements of TurboEdit algorithm are made. The effects of different arc sections, the length of arc section and gross errors are taken into account in calculating wide-lane ambiguity and its variance. It is by analyzing three successive epochs that both of the combination observations determine whether the current epoch is a gross error or cycle slip. A new fitting model based on sliding window is put forward, which is more suitable for the fact that Geometry-Free combination observations constitute a smooth time series. The secondary processing for divided G-F arc sections can further reject gross errors. The experimental results show that the new algorithm can detect and fix the equal-distance, equal-cycle and continuing happened cycle slips, can also reject successive gross errors and those less obvious gross errors.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第3期109-113,共5页
Journal of Geodesy and Geodynamics
基金
国家863发展计划(2007AA12Z346)
关键词
精密单点定位
非差相位数据预处理
周跳
粗差
TurboEdit
precise point positioning
undifferentiated phase data preprocessing
cycle slip
gross error
TurboEdit algorithm
