Page 119 - 卫星导航2021年第1-2合期
P. 119
Xia et al. Satell Navig (2021) 2:8 Page 5 of 19
Fig. 3 The number of the visible satellites for a BDS, b GPS, c Galileo and d GLONASS at three moments in the UK territory
Fig. 4 GDOP distribution of BDS satellites with elevation angles above 5° at a GPS time 15:00:00, b 16:00:00, and c 17:00:00 on July 23, 2020
