The effects of higher-order ionospheric delay on precise point positioning ambiguity resolution tropospheric parameters estimation
This paper investigates the impact of high-order ionospheric(HOI)delays on the estimation of tropospheric parameters in precise point positioning ambiguity resolution(PPP-AR).The study utilizes observation data from 16 continuously operating reference stations(CORS)of the Satellite Positioning Reference System in Hong Kong(SatRef)to estimate tropospheric parameters and analyze the effects of different ionospheric environments on HOI delays.The experimental results indicate that during periods of solar wind and geomagnetic storm activity,HOI delays have a maximum impact of 4.03 mm on the tropospheric zenith wet delay(ZWD)in PPP-AR,with the impact being more pronounced on the north-south gradient compared to the east-west gradient.Furthermore,the experimental results further demonstrate that through(global positioning system)GPS/Galileo satellite navigation system(Galileo)PPP-AR can significantly reduce the impact of HOI delays on ZWD,with reductions in root mean square(RMS)values of 17％,15％,and 21％for the north-south gradient and east-west gradient,respectively.
higher-order ionospheric delayprecise point positioning ambiguity resolutionzenith wet delaygradients
NETL
NSTL
万方数据
