Gopalratnam, Girija, and RaolJ. “View the PDF Document PC Based Flight Path Reconstruction Using UD Factorisation Filtering Algorithm .”. Defence Science Journal 43, no. 4 (January 1, 2013): 429-447. Accessed October 27, 2020. https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/4294.