Losing the Signal: Tracking and Monitoring GNSS Integrity Risks

Overview:
GNSS integrity degradation represents a critical and expanding threat in aviation. Spoofing, jamming, false position injection, and other interference modalities now constitute routine operational hazards affecting navigation accuracy, surveillance fidelity, and safety assurance systems across the aviation environment.

This presentation examines how GNSS integrity issues can be systematically detected, measured, and monitored using objective metrics. It focuses on two complementary approaches: positional integrity monitoring and independent position verification, enabling ANSPs to identify anomalies with higher confidence and fewer false positives.

The presentation further demonstrates the operational integration of GNSS integrity metrics into the CANSO Safety Reports and Aireon’s ANSP-specific dashboards, establishing a standardised framework for longitudinal risk assessment, trend analysis, and comparative benchmarking against established safety performance metrics.

Session Objectives:
• Characterise the current operational threat landscape for GNSS interference, including technical analysis of spoofing attacks, jamming profiles, and false position injection.
• Define quantifiable metrics for positional integrity assessment and degradation detection thresholds.
• Demonstrate the application of independent position verification techniques to enhance detection confidence and minimise false alarm rates.
• Present integration methodologies for incorporating GNSS integrity indicators into existing Regional Safety Report structures.