Saji, Sharon Sara, Harishkumar Sellamuthu, and Ram Krishan Sharma. “On J2 Short-Term Orbit Predictions in Terms of KS Elements”. International Journal of Advanced Astronomy 5, no. 1 (January 13, 2017): 7–11. Accessed April 29, 2024. https://www.sciencepubco.com/index.php/IJAA/article/view/7083.