A New GPT2w Model Improved by PSO-LSSVM for GNSS High-Precision Positioning

Table 1

Comparison of ZTD between GPT2w and PSO-LSSVM at selected stations.

GNSS stations	GPT2w-ZTD RMS (mm)	PSO-LSSVM-ZTD RMS (mm)	Percentage of improvement
HKKT	1.4514	0.4989	65.62%
HKOH	1.3078	0.3231	75.29%
HKPC	1.4006	0.3320	76.29%
HKSC	1.3983	0.3141	77.54%
HKSS	1.3845	0.3014	78.23%
HKST	1.3074	0.3036	76.78%