Abstract:We derive the triple-frequency ionospheric-free parameters and minimum noise line expression using the space geometric principle. We compare the positioning accuracy and convergence speed of triple-frequency and dual-frequency ionospheric-free models using data from five static observation stations and Beidou triple-frequency observation data of measured sports car. The results show that under static conditions, the position error of triple-frequency PPP is 3.75 cm, the standard deviation is 2.06 cm, and convergence time is 109.6 min, which is 22.3%,19.8% and 22.1% higher than the performance of dual-frequency PPP, respectively. Under dynamic conditions, the position error of triple-frequency PPP is 15.21 cm and the standard deviation is 12.89 cm, which is 42.4% and 26.8% higher than the dual-frequency PPP, and the convergence speed is better than that.
HE Maihang,SUN Fuping,XIAO Kai et al. Model and Verification of Beidou Triple-Frequency IF-PPP Based on Space Geometric Principle[J]. jgg, 2020, 40(12): 1290-1293.