Multi-GNSS Fast Precise Point Positioning with Multi-Frequency Uncombined Model and Cascading Ambiguity Resolution

Figure 2

Distribution of stations for satellites FCB estimation from IGS MGEX and ARGN. Stations denoted as blue solid circles only receive GPS and galileo dual-system data; stations denoted as red solid circles can additionally receive B1I and B3I signal data of BDS; stations denoted as green solid circles can additionally receive B1c or B2a signal data of BDS-3; stations denoted as yellow stars can receive E6 signal data of Galileo.