一种适用于动态变形测量的双频模糊度实时解算方法  

An Instantaneous Ambiguity Resolution Method for Kinematic Deformation Surveying Using GPS

作　　者：薛志宏[1,2,3] 楼益栋[2] 易文婷[2] 董洋洋[2] 

机构地区：[1]信息工程大学测绘学院,郑州市陇海中路66号450052 [2]武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号430079 [3]河南理工大学矿山空间信息技术国家测绘地理信息局重点实验室,焦作市世纪大道2001号454003

出　　处：《武汉大学学报（信息科学版）》2012年第6期683-687,共5页Geomatics and Information Science of Wuhan University

基　　金：矿山空间信息技术国家测绘地理信息局重点实验室开放基金资助项目(KLM201009)

摘　　要：设计了一种短基线情况下双差模糊度的实时解算方法,利用双频载波相位的两个长波组合φ-3,4和φ4,-5,通过坐标初始值约束和双频信号之间的相关关系,可快速求解模糊度,采用抗差自适应滤波来提高模糊度求解的可靠性及定位精度。该方法对监测点初始点位误差的要求可放宽至50cm,适合于变形幅度较大的动态监测系统。Ambiguity resolution （AR） instantaneously is a significant way to improve the continuity and reliability for GPS kinematic deformation surveying system, and the AR is easier for longer wavelength. We propose a new method for AR in double-differenced level using a single epoch of data. Two combined signals with longer wavelength, qv-a,4 and 94,-s, are used in this method. Based on the constraints of priori coordinates and the relation be- tween the dual frequency, AR instantaneously is achieved. A robust adaptive Kalman filter is used for ensure the reliability of AR and the accuracy of position. The tolerance of position error for priori coordinate is exceeded to 50 cm and suit for kinematic deformation surveying.

关 键 词：模糊度 实时解算 动态变形测量 组合观测值 抗差自适应卡尔曼滤波 

分 类 号：P228.41[天文地球—大地测量学与测量工程]