Evaluation of multi-GNSS orbit and clock extrapolating error and their influence on real-time PPP during outages of SSR correction
SHU Bao, WANG Li, ZHANG Qin, HUANG Guanwen
Acta Geodaetica et Cartographica Sinica . 2021, (12): 1738 -1750 .  DOI: 10.11947/j.AGCS.2021.20200580