Ionospheric STEC and VTEC Constraints for Fast PPP

摘要: Significant initialization or convergence time of PPP is a limiting factor for many applications. Recent studies have indicated that external ionospheric information can be applied to provide tight constraint reduce the correlation between position parameters and ionosphere shorten long time. However, receiver DCB one challenge separate from STEC. Receiver often neglected taken granted it absorbed by clock parameter. In this paper, we critiqued STEC VTEC constrained models separating taking advantage nearby station GIM products. The results show improvements positioning accuracy are about 67 26% after 1 min. significantly reduced with constraints station, while performance depends on quality GIM.