TY JOUR TI Variability of ionospheric TEC at low latitude station,Hyderabad during medium solar activity KW Ionospheric variability KW Total Electron Content KW International Reference Ionosphere-2016 model JO Russian Journal of Earth Sciences AU Bhardwaj, S.. AU Khan, P.. AU Manssori, A.. AU Ahmad, R.. AU Purohit, P.K. PY 2021 IS 21 PB Geophysical Center of the Russian Academy of Sciences