will be continued.

This research was supported by NNSFC grants 11790303 (11790300), 41774180, and 11750110424. The authors are grateful to the Nançay team for their open access data policy. Also, the authors thank the teams who support and operate various CALLISTO stations. GPS data were provided by IGS, UNAVCO, SOPAC, EPN, BKGE, OLG, IGNE, DUT, ASI, ITACYL, ESEAS, SWEPOS, NMA, BIGF, RENAG, and ITINGV. GPS-TEC database was partially supported by JSPS KAKENHI Grant Number JP16H06310, JP15H05813, and JP16H06286.

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