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 , .. AU , .. AU , .. AU , .. AU , .. PY 2021 IS 21 PB Геофизический центр Российской Академии Наук