Modelling and Assessment of BDS-3 Real-time Precise Point Positioning Time Transfer Based on PPP-B2b Service

Table 2

Processing strategies.

Items	Methods
Constellation	BDS-3
Filter	Kalman filter
Cut-off elevation	7°
Observation weight	sin 2(e) [32]
Observations	B1I/B3I and B1C/B2a IF observations
Sampling rate	30 s
Phase windup	Model correction [33]
Tidal effect	Model correction [34]
Relativistic effect	Model correction [34]
APC	igs.atx
Tropospheric Delay	Hydrostatic delay: saas model [35]
	Wet delay: estimated + GMF [36] mapping function
Reference	GBM final products
Receiver clock offset	Estimated as white noise
Phase Ambiguity	Float