The ionospheric convection data extracted from the SuperDARN convection map dataset

This is the ionospheric convection data used in paper titled "The morphology and oscillations of nightside mid-latitude ionospheric trough at designated longitudes in the Northern Hemisphere" published in Journal of Geophysical Research: Space Physics (doi: 10.1029/2024JA032864), which were extracted from the daily SuperDARN dataset thanks to Xueling Shi and Shibaji Chakraborty at Virginia Tech. This data include three parameters at 2-min temporal resolution: Cross Polar Cap Potential (CPCP), Heppner-Maynard Boundary (HMB), and the number of velocity vectors (NVV).