Robust and Resilient GNSS Synchronization of LEO Satellites for Space-based Aircraft Multilateration

This paper aims at developing a robust and resilient synchronization framework for Low Earth Orbit (LEO) satellites based on the combination of GNSS and Precision Time Protocol (PTP) via inter-satellite link. The satellite synchronization is needed to enable precise aircraft tracking in areas without radar coverage, by leveraging Automatic Dependent Surveillance-Broadcast (ADS-B) signals and advanced localization algorithms, exploiting Time Of Arrival (TOA), Frequency Of Arrival (FOA), and Angle Of Arrival (AOA). An Extended Kalman Filter (EKF) corrects onboard clock errors in real time, while detecting and mitigating anomalies or cyber-attacks like GNSS jamming, spoofing or denial of service. Nanosecond accuracy under nominal and disrupted conditions is obtained, significantly enhancing safety and reliability of the tracking system.

• Publication year

  2025

• Venue

  IEEE International Workshop on Metrology for AeroSpace

• Publication date

  2025-06-18

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1109/MetroAeroSpace64938.2025.11114554
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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