TY JOUR TI Latitudinal variation of ionospheric TEC at Northern Hemispheric region KW Ionospheric TEC KW $Dst$ KW sunspot number KW $Kp$ index JO Russian Journal of Earth Sciences AU Parwani, M.. AU Atulkar, R.. AU Mukherjee, S.. AU Purohit, P.K. PY 2019 IS 19 PB Geophysical Center of the Russian Academy of Sciences