Upper atmosphere physics and radiopropagation Working Group; Cesaroni, C.; Marcocci, C.; Pica, E.; Spogli, L. Electronic Space Weather Upper Atmosphere Database (eSWua) - Total Electron Content (TEC) Data, Version 1.0. Istituto Nazionale di Geofisica e Vulcanologia (INGV) August 1, 2020. https://doi.org/10.13127/ESWUA/TEC.