Improved Mitigation Method for the Multipath Delays of BDS-3 Code Observations with the Aid of a Sparse Modeling Algorithm

Figure 6

Residuals between predicted and estimated delays of Experiments 1 and 2 in the third group of experiments (WUH1, DOY 228, 2020).

(a) Original multipath series

(b) Multipath residuals for the AR method only

(c) Multipath residuals of the LS-combined AR

(d) Multipath residuals with prior information