Real-Time Modeling of Regional Tropospheric Delay Based on Multicore Support Vector Machine

Table 1

Real-time PPP estimation strategy.

Parameter		Handling strategy
Observation information	Observation	LC, PC
	Elevation mask angle	5°; height angle weight determination
	Phase wing-up	Model correction
	Phase center change	IGS08 model
Error correction	Tide correction	Model correction (solid and ocean tide)
	Satellite phase center	Absolute phase center
	Relativistic correction	Model correction
	Satellite clock offset	GBM precise clock and CLK93 real-time clock
	Satellite orbit	GBM precise orbit and CLK93 real-time orbit
	ERPs	GBM IERS products
Parameter estimation	Site coordinates	Estimated as constant for each epoch
	Troposphere	Estimated, UNB3m model + random walk/VCE
	System time offset	Estimated as white noise for each epoch
	Receiver clock biases	Estimated as white noise for each epoch
	Ambiguity	Estimated as constant for each ambiguity arc