In this paper,based on analyzing the precision of forecasting ephemeris quantificationally,the feasibility of applying the forecasting ephemeris to predict the DOP was researched,and the view of GPS optimization design on GPS ephemeris was put forward.

• 本文通过定量分析卫星预报星历的精度,对应用预报星历预报卫星的几何分布精度因子的可行性进行了探讨,提出应用预报星历对GPS测量进行优化设计的思想。