北斗卫星导航系统测量误差指标体系

围绕北斗卫星导航系统中的伪距测量误差，全面分析系统的测量原理，提出系统误差指标体系的构建流程，构建基于误差层次分解方法的北斗卫星导航系统测量误差指标体系，指标体系由1个系统层指标、3个准则层指标、11个要素层指标和36个基础指标等51个指标组成。同时，结合实例，从卫星下行链路的绝对时延的测试需求，引出了绝对时延的测试问题，定义星载导航任务处理单元对外1PPS信号的输出口作为卫星的时间零点，给出需要测试的绝对时延的路径组成。根据目前系统的实际情况，通过每一部分的测试误差，求出整个绝对时延的测量误差精度。

Measurement Error Index System of BeiDou Satellite Navigation System

This paper focuses on the pseudorange measurement error in the BeiDou satellite navigation system, comprehensively analyzes the measurement principle of the system, proposes the construction procedure of the system error index system, and constructs the BeiDou satellite navigation system measurement error index system based on the error gradation decomposition method. It consists of 51 indicators including a system-level indicator, 3 criteria-level indicators, 11 factor-level indicators, and 36 basic indicators. At the same time, in combination with an example, the absolute delay test requirement of the downlink of the navigation satellite leads to the problem of the absolute delay testing. The output port of the 1PSS external to the satellite navigation task processing unit is defined as the time zero point of the satellite, and the path of the absolute delay that needs to be tested is given. According to the actual situation of the current engineering system, through the measurement error of each part, the measurement error accuracy of the entire absolute delay is obtained.