Dabbakuti, J R K Kumar, D. Venkata Ratnam, and Surendra Sunda. “Modelling of Ionospheric Time Delays Based on Adjusted Spherical Harmonic Analysis”. Aviation 20, no. 1 (April 11, 2016): 1-7. Accessed November 10, 2024. https://transport.vgtu.lt/index.php/Aviation/article/view/693.