GPS导航电文对定位性能的影响分析  

Influence Analysis of GPS Navigation Messages on Positioning Performance

作　　者：杨峰 林静然[2] 袁梦 周飞[2] 廖昌俊[2] YANG Feng;LIN Jing-ran;YUAN Meng;ZHOU Fei;LIAO Chang-jun(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China;University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]电子信息控制重点实验室,成都610036 [2]电子科技大学,成都611731

出　　处：《电子信息对抗技术》2019年第6期38-43,47,共7页Electronic Information Warfare Technology

摘　　要：开展GPS导航电文对定位性能的影响分析,以时间和卫星空间坐标为切入点,综合利用一阶线性近似等方法对非线性定位方程进行转换和处理,推导出电文参数上的误差和定位误差间的定量关系,据此判断定位性能对某个电文参数的敏感度,通过计算机仿真验证了分析方法的正确性和有效性。The influence of GPS navigation messages on positioning performance is analyzed. By formulating the positioning error caused by different parameters of navigation messages, the influence parameters can be identified and protected;thus helping to improve the safety of GPS. Based on the positioning principles of GPS, the first-order linear approximation method is employed to expand the nonlinear positioning equations with respect to time and satellite coordination parameters, respectively. Hence, the degrees of influence of these parameters on positioning performance can be derived. The effectiveness of the proposed analysis method is verified by numerical simulations.

关 键 词：导航电文 定位性能 敏感度分析 一阶线性近似 

分 类 号：P228.4[天文地球—大地测量学与测量工程]