Using Non-meteorological Parameters Tropospheric Delay Estimation Model for Accelerating Convergence of PPP

Research based on non-meteorological parameters in the tropospheric zenith total delay estimation model is becoming mature and the scope of applications continues to broaden.We studied application of non-meteorological parameters to precise point positioning，and analyzed the effect of its application from the aspects of positioning accuracy and convergence time. Experimental results show that，when applied the non-meteorological parameter estimation model，positioning convergence time has been significantly improved by approximately 23%.However，there was no significant change in postttontng accuracy.