GNSS载波相位相对定位的线性化模型误差分析  

Error Analysis of Linear-Model of Relative Positioning using Carrier Phase of GNSS

作　　者：康荣雷[1] 熊杰[1] 

机构地区：[1]中国西南电子技术研究所,四川成都610036

出　　处：《青岛大学学报（工程技术版）》2017年第1期112-116,122,共6页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：国防重点实验室基金项目(9140C020203150C02008);中国电子科技集团公司第十研究所基金(H15039)

摘　　要：为了解决传统的载波相位差分方程线性化模型在中长基线存在精度降低的问题,本文提出了一种基于线性插值的改进载波相位差分方程线性化模型,并对改进模型与传统模型的线性化误差进行了定量分析。推导了能在工程应用中简单实现的改进差分方程,并将差分基线长度作为变量进行误差精度的计算仿真,以定量对比的方式分析本文改进的线性化模型和传统线性化模型的精度。仿真结果表明,当基线距离小于40km时,传统线性化模型的误差最大为40m,改进后的线性化模型的误差最大为4cm,改进模型的误差精度仍在厘米级测量精度要求内;当基线距离超过40km时,本文提出的线性化模型的假设条件将不再满足。该研究对提高卫星导航系统的精度具有重要意义。In order to solve the problem of low accuracy about the traditional carrier phase difference equation linearization model for middle-long baseline,the improved carrier phase difference equation linearization model is proposed based on linear interpolation and the linear error of the improved linearized model and the traditional linearized model is analyzed quantitatively.An improved difference equation is derived,which can be easily implemented in engineering applications.Meanwhile,the accuracy between the improved linearized model and the traditional linearized model is analyzed quantitatively under different baseline.The simulations show that the max positioning error of traditional linearized model is 40 m,while the improved linearized model is 4cm.The improved linearized model satisfies the requirement of centimeter within 40 km baseline measurements.When baseline is more than 40 km,the assumption is no longer satisfied for improved linearized model.The proposed method is significant to improve positioning accuracy in this paper.

关 键 词：GNSS 载波相位 线性化模型 线性插值 

分 类 号：P228.4[天文地球—大地测量学与测量工程]