A Hybrid Analytical-Machine Learning Approach for LEO Satellite Orbit Prediction. - Jamil Haidar-Ahmad; Nadim Khairallah; Zaher M. Kassas (FUSION, 2022)

An Interacting Multiple Model Estimator of LEO Satellite Clocks for Improved Positioning. - Nadim Khairallah; Zaher M. Kassas (VTC Spring, 2022)

Navigation with Multi-Constellation LEO Satellite Signals of Opportunity: Starlink, OneWeb, Orbcomm, and Iridium. - Zaher M. Kassas; Sharbel E. Kozhaya; Haitham Kanj; Joe Saroufim; Samer Watchi Hayek; Mohammad Neinavaie; Nadim Khairallah; Joe Khalife (PLANS, 2023)

Ephemeris Tracking and Error Propagation Analysis of LEO Satellites With Application to Opportunistic Navigation. - Nadim Khairallah; Zaher M. Kassas (IEEE Trans. Aerosp. Electron. Syst., 2024)

Aircraft Navigation in GNSS-Denied Environments via Radio SLAM With Terrestrial Signals of Opportunity. - Zaher M. Kassas; Nadim Khairallah; Joe J. Khalife; Chiawei Lee; Juan D. Jurado; Steven Wachtel; Jacob Duede; Zachary Hoeffner; Thomas Hulsey; Rachel Quirarte; RunXuan Tay (IEEE Trans. Intell. Transp. Syst., 2024)