Analysis of the impact of different geomagnetic activity levels and high-order ionospheric corrections on PPP
Wanjun Ma, Xing Zhou, Zhenyu Li, Liyang Wang, Liang Zhao, Gongwei Xiao, Genyou Liu
Acta Geodaetica et Cartographica Sinica . 2026, (7): 1254 -1265 .  DOI: 10.11947/j.AGCS.2026.20250327