载波相位差分接收机自主完好性监测研究

Receiver Autonomous Integrity Monitoring Based on Differential Carrier Phase

摘要: 首先提出了浮点变换完全去相关法,该方法能够在单历元动态确定整周模糊度。研究了基于载波相位测量的完好性监测方法。利用最小二乘残差构造统计检验量,对整周模糊度进行检测。分析了定位误差保护限与卫星构型、漏警概率的关系。实测数据表明,整周模糊度在单历元动态求解的成功率为100%,增加1颗卫星将使垂直定位误差保护限减少约0.2 m,统计检验量检测周跳的正确率为100%。

Abstract: We propose a new integer ambiguity resolution method,which enables one to determine DD carrier phase integer ambiguities at single epoch on the fly.Then receiver autonomous integrity monitoring(RAIM) based on carrier phase is researched.Test statistic is constructed using the method of least squares to test the integer ambiguity.Relationship between protection level,satellite geometry and miss detection probability is analyzed.Experiment results indicate that the success rate of integer ambiguity is 100% at single epoch on the fly.By adding one observation satellite,the vertical protection level will reduce about 0.2 m,the test statistic can detect cycle slips with 100% success rate.