Fig. 3From: Initial assessment of single- and dual-frequency BDS-3 RTK positioningHorizontal (E is east direction and N is north direction) position scatters and vertical (U is up direction) time series of BDS-3 dual-frequency the B1C + B2a, and the B1I + B3I for zero-baseline IGG01–IGG03 with an elevation cutoff angles of 15° on day 172 of 2020Back to article page