As uncrewed aviation becomes increasingly dependent on shared digital position, global navigation satellite system (GNSS) degradation can propagate far beyond navigation — affecting containment, conformance, human decision-making and ultimately the trust on which digital airspace is built, writes Manuel Ignacio Pérez Pan
A complete loss of GNSS is comparatively easy to understand. The navigation solution disappears, the aircraft generates an alert, and the remote crew recognises that a capability has been lost. The consequences may be serious, particularly during beyond visual line of sight (BVLOS) flight, but the situation itself is clear: something that was available is no longer available, and the crew should transition into the degraded-navigation or contingency procedure defined before departure.
The more difficult case begins when very little appears to have failed. Latitude and longitude are still available. Ground speed looks plausible. The aircraft icon continues moving smoothly across the control-station map. The flight-control system still has a navigation solution, the aircraft appears to remain inside its expected operational volume, and connected services may continue receiving position information. To the remote pilot, the operation may look normal. Yet the position may no longer represent reality.
Read the full story at our sister publication Unmanned Airspace.
