Influence of the second-order ionospheric delay on GPS PPP time transfer
DING Shuo,YANG Haiyan,YANG Xuhai,ZHANG Zhe,ZHAO Kunjuan
Journal of Xidian University . 2021, (4): 50 -56 .  DOI: 10.19665/j.issn1001-2400.2021.04.007

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