Hedi, Ivan, Enes Cirikovic, Zeljko Borkovic, and Renato Filjar. “A Method for Assemblage of an Open Access Data Set for Research in Geomagnetic Effects on GPS/GNSS Ionospheric Delay in Sub-Equatorial Regions”. The Journal of CIEES 3, no. 1 (May 30, 2023): 7–11. Accessed June 25, 2024. https://journal.ciees.eu/index.php/ojs/article/view/35.