Description

Jamming is an intentional radio frequency interference (RFI) with GNSS signals. This prevents receivers from locking onto satellites signals and has the main effect of rendering the GNSS system ineffective or degraded for users in the jammed area.

Spoofing involves broadcasting counterfeit satellite signals to deceive GNSS receivers, causing them to compute incorrect position, navigation, and timing data.

These issues particularly affect the geographical areas surrounding conflict zones, e.g. the Black Sea and the Middle East. It is not currently possible to detect affected areas from a distance making pilot reports the main source of information. Indications of possible GNSS RFI include: