伪距测量的概念、定义与精度评估方法

Conception,Definition and Evaluation of Pseudo-range Measurement

伪距是卫星导航系统的基本观测量,伪距的测量精度直接决定了系统的导航定位精度。从伪距测量的基本概念入手,给出了伪距、钟差、真距(传播时间)、设备时延、观测时刻等基本物理量的定义及其相互间的关系,探讨了设备时延测定与伪距测量精度评估的方法与技术状态设置等问题,并给出了几点结论与建议。

Pseudo-range is a significant observable in satellite navigation systems. It is usually related to clock deviation, equipment time-delay and many other basic conceptions. Compared with the existing comprehensions, the specific conceptions and definitions are given of pseudo-range, clock deviation, real range （propagation time）, and equipment time-delay, etc. Their relationships are also deduced. At last, the way how to measure and evaluate equipment time-delay, and how to estimate the precision of pseudo-range is discussed in details. Some conclusions and suggestions are also given.