Abstract:The paper analyzes the characteristics of AODE in broadcast ephemeris for different orbit of BDS from 2013 to 2015. According to the AODE distribution of IGSO and MEO, the signal-in-space accuracy based on different AODE is analyzed in the paper. The results show: AODE of satellites is in period and is consistent with the orbit. For IGSO satellites, the average AODE is about 1.7 hours, reaching to a maximum of 7 hours. Considering orbit alone, the URE of different AODE varies 0.5 m at the worst. For MEO satellites, the average AODE is about 11 hours, and the maximum reachedis two days. Considering orbit alone, the URE of different AODE varies 0.9 m for the worst. During 2013 to 2015,the average URE of IGSO satellites are 0.81 m, 0.84 m and 1.11 m; for MEO satellites they are 0.84 m, 0.82 m and 1.04 m.