Correction Model of BDS-3 Satellite Pseudorange Multipath Delays and Its Impact on Single-Frequency Precise Point Positioning

Table 3

Single-frequency PPP processing strategy [37, 38].

Parameter	Processing strategy
Observation	BDS-3: B1I, B3I, B1C, B2a
Precise ephemeris and clock bias	Provided by GFZ analysis center
Function model	Undifferenced and uncombined
Stochastic model	Sine function model based on elevation
Elevation cut-off	10°
Phase center offset (PCO) and phase center variation (PCV)	igs14.atx
Differential code bias (DCB)	DCB files
Tide models	International Earth rotation and reference systems (IERS) 2010
Relativistic effect	Model correction
Antenna phase wind-up	Model correction
Ionospheric delay	Random walk
Tropospheric delay	Dry component: Saastamoinen model;
	Wet component: estimated
Station coordinates	Estimated
Receiver clock bias	Estimated
Ambiguity	Estimated