Fig. 4From: Initial assessment of single- and dual-frequency BDS-3 RTK positioningHorizontal (E is east direction and N is north direction) position scatters and vertical position (U is up direction) time series for single-frequency of BDS-3 B1C, B2a, B1I, and B3I for short-baseline IGG04–IGG05 with an elevation cutoff angles of 15° on day 172 of 2020Back to article page