Chakraborty, Monti, Sanjay Kumar, Barin Kumar De, and Anirban Guha. “Latitudinal Characteristics of GPS Derived Ionospheric TEC: A Comparative Study With IRI 2012 Model”. Annals of Geophysics 57, no. 5 (October 14, 2014): A0539. Accessed April 20, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/6438.