The Feature of Ionospheric Mid-Latitude Trough during Geomagnetic Storms Derived from GPS Total Electron Content (TEC) Data. - Na Yang; Tao Yu; Huijun Le; Libo Liu; Yang-Yi Sun; Xiangxiang Yan; Jin Wang; Chunliang Xia; Xiaomin Zuo; Guangliang Huang (Remote. Sens., 2022)