Abstract:This paper firstly compares and analyzes the difference between the unit harmonic estimation and the multi-harmonic estimation in extracting multipath effects, introduce the mathematical principles and implementation methods of the two methods, then compare the effects of the two methods through a field experiment. The experimental results show that both unit-harmonic estimation and multi-harmonic estimation can significantly extract the multipath effect. In the case of no data interruption, the denoising effect of multi-harmonic estimation is more obvious. The rejection rate of E/N/U directions is improved by 2.67%/2.50%/4.48% respectively, but in the case of severe data interruption, the denoising effect of the unit harmonic estimation is better. The rejection rate of the unit harmonic estimation in the E/N/U direction is improved by 2.42%/4.65%/0.05% respectively.
CAO Tingting,LI Zhifeng,GOU Haoyang. Research on Least Squares Harmonic Estimation in Extracting the Multipath Effect of GNSS Coordinate Time Series[J]. jgg, 2022, 42(2): 139-142.