基于双频载波相位组合的变形信息逐步精化方法

针对GPS动态变形监测,利用监测点位置精确已知的条件,提出了一种新的单历元变形信息解算算法,避开了整周模糊度的求解和周跳的探测与修复,极大简化了数据处理过程。针对较大的瞬时变形量,首先采用长波长的双频载波相位组合观测量进行求解,然后利用宽巷和L1载波相位观测量进行逐步精化处理,从而可以精确求解高达0.8 m的瞬时变形量。静态和动态实验结果表明,该方法可以达到±5 mm的精度,能够有效应用于快速变形监测。

Precise processing of deformation information based on the combined dual frequency carrier phase observation

A new single epoch algorithm for the GPS deformation information was put forward for dynamic monitoring in the case that the accurate coordinates of the monitoring point and reference station were known.The problems of ＂detection and repair of cycle slips＂ and ＂determination of ambiguity＂ can be avoided so that the data processing is simplified greatly.In order to solve the large deformation,first adopting the combined dual frequency carrier phase observation with large wavelength to get the initial solution,then using the wide lane and L1 carrier phase to improved the precision gradually.So the deformation information over 0.8 meter could be calculated accurately.The results of the static and dynamic experiments indicate that the precision of the method can reach ±5 mm and the method can be applied to fast deformation monitoring effectively.