Title: TEC data Description: This is TEC data used for the paper: Variations in thermosphere composition and ionosphere total electron content under 'geomagnetically quiet' conditions at solar-minimum. There are two files: One is a 2-day data from 0:10 UT on DOY 110 in 2019 to 23:40 UT on DOY 111 in 2019 (name: TEC 30min19110111) another is a 2-day data from 0:10 UT on DOY 232 in 2019 to 23:40 UT on DOY 233 in 2019 (name: TEC 30min 19232233) Metadata URL: https://gdex.ucar.edu/dataset/id/cf2721ff-94b3-4794-9fbf-7248fb1c6c4d.html