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)

Simultaneous LEO Satellite Tracking and Differential LEO-Aided IMU Navigation. - Joe Saroufim; Samer Watchi Hayek; Zaher M. Kassas (PLANS, 2023)

Robust Position Estimation using Range Measurements from Transmitters with Inaccurate Positions. - Artun Sel; Samer Watchi Hayek; Zaher M. Kassas (FUSION, 2024)

Opportunistic Navigation Exploiting Always-On and On-Demand 5G Downlink Signals on a Ground Vehicle. - Faezeh Mooseli; Samer Watchi Hayek; Sharbel E. Kozhaya; Zaher M. Kassas (VTC Fall, 2024)

A Localization Error Upper-bound with Range Measurements to Transmitters with Uncertain Positions. - Artun Sel; Samer Watchi Hayek; Zaher M. Kassas (VTC Fall, 2024)

Warm Start Navigation with Non-Cooperative LEO Satellites via Online Ephemeris Error Estimation. - Samer Watchi Hayek; Zaher M. Kassas (PLANS, 2025)

Towards Navigation with Non-Cooperative LEO Satellites: Resolving Ephemeris and Timing Errors. - Zaher M. Kassas; Joe Saroufim; Samer Watchi Hayek; Sharbel E. Kozhaya; Will Barrett (PLANS, 2025)

Light will Guide You: Passive Joint DOA/FOA Sensing, Tracking, and Navigation with Unknown LEO Satellites. - Sharbel E. Kozhaya; Joe Saroufim; Samer Watchi Hayek; Paul El-Kouba; Zaher M. Kassas (PLANS, 2025)

Modeling and Compensation of Timing and Spatial Ephemeris Errors of Non-Cooperative LEO Satellites With Application to PNT. - Samer Watchi Hayek; Zaher M. Kassas (IEEE Trans. Aerosp. Electron. Syst., 2025)