Joint Analysis With Swarm and Ground Stations: Ionospheric Current System and Geomagnetically Induced Currents. - Zhang, C. M.; Dunlop, M. W.; Yang, J. Y.; Tan, X.; Marghitu, O.; Blagau, A.; Xiong, C.; Dong, X. C.; Wei, D.; Constantinescu, V.; Kervalishvili, G. (Journal of Geophysical Research. Space Physics, 2026)