基于三频观测值中长基线快速动态定位方法  

A method of fast dynamic positioning based on three frequency observations and robust filter between middle-long baseline

作　　者：蔡巍 陈明剑[1] 苗岳旺 CAI Wei;CHEN Mingjian;MIAO Yuewang(Institute of Geospatial Information,Information Engineering University,Zhengzhou 450001,China;Xi'an Division of Surveying and Mapping,Xi'an 710054,China)

机构地区：[1]战略支援部队信息工程大学地理空间信息学院,河南郑州450001 [2]西安测绘总站,陕西西安710054

出　　处：《海洋测绘》2023年第3期39-44,共6页Hydrographic Surveying and Charting

摘　　要：针对全球卫星导航系统(globalnavigationsatellitesystem,GNSS)的中长基线快速动态定位,提出了一种基于三频组合观测值的实时动态差分(real-timekinematic,RTK)卡尔曼滤波定位方法,以位置参数和宽巷组合观测值的双差模糊度为状态向量进行参数估计,采用最小二乘模糊度降相关平差(LAMBDA)方法搜索固定模糊度,以改正后的超宽巷组合观测值为高精度“伪距”,以宽巷组合观测值作为载波相位进行定位解算。通过香港地区和河南省境内的两组中长基线实验数据,详细分析了该方法在中长距离下的快速动态定位解算性能。实验结果表明,采用该方法宽巷模糊度可实现单历元固定,在静态固定率达到约100%,动态情况下固定率也可以达到约65%,达到了快速高精度定位解算的要求,平面位置精度均能实时达到厘米级。This paper proposes a RTK Kalman filter positioning method based on three-frequency combined observations for the fast dynamic positioning of the GNSS at medium and long baseline.According to the characteristics of three-frequency combined observations,the combined observations have long wavelength,and the influence of atmospheric delay residual after the difference model can be ignored.With position parameter and wide lane combination observations of double difference ambiguity parameter estimation for state vector,using the LAMBDA method for fixing ambiguity,the super wide lane combination observations for high precision pseudorange,with wide lane combination observations as the carrier phase for positioning solution,the fast dynamic positioning is realized.Based on two sets of medium and long baseline experimental data in Hong Kong Region and Henan Province,the performance of the proposed method is analyzed in detail under medium and long distance.The experimental results show that the ambiguity of wide lane can achieve single epoch fixation,and the static fixation rate can reach about 100%,and the dynamic fixation rate can reach about 65%,which meets the requirements of fast and high-precision positioning solution,and the plane position accuracy can reach the centimeter level in real time.

关 键 词：全球卫星导航系统 差分定位 整周模糊度 超宽巷组合 宽巷组合 单历元 

分 类 号：P228[天文地球—大地测量学与测量工程]