Determination of Distance and Speed of Motion by the Standard Point Positioning based on Smartphone GNSS
It is of great practical value to determine the distance and speed of motion accurately.In this paper,the GNSS observation value of smart phone is used for the standard point positioning(SPP).We use the differencing and the moving average method to correct the smart phone's stand-ard point positioning coordinates,and then use the modified coordinates to calculate the distance and speed of motion.The results showed that no matter whether the high-precision geodetic GNSS re-ceiver OR smartphone GNSS receiver was used as the base station,as long as the smart phone was used as the rover,smart phone positioning accuracy could not be significantly improved by position difference correction.It was related to the error composition of SPP(including tropospheric and ion-osphere model correction)on the smart phone,that was,the main part of the error was the non-public error between the rover and the base station,which could not be eliminated by differencing.The distance and velocity derived from the coordinate time series filtered by moving average method were accurate:comparing with the result from roller measurements,the distance errors were less than 15 m(total distance larger than 4 000 m),and the velocity errors were less than 0.65 m/min(the speed is 80～150 m/min),the accuracy was equivalent to the data accuracy of commercial sports watches.
global navigation satellite systemandroid smartphonedifferential GPSdynamic posi-tioning errormoving average method
国家科技期刊平台
NSTL
万方数据
维普
