GPS Jamming
Definition: The deliberate emission of radio frequency signals to disrupt or deny Global Positioning System (GPS) signals, preventing receivers from determining accurate position, velocity, or time.
Overview
GPS jamming is a form of Electronic Warfare (EW) that exploits the vulnerability of GPS signals due to their low power upon reaching Earth. Unlike spoofing, which provides false data, jamming simply drowns out the legitimate signal with noise.
Recent Developments & Case Studies
- Europe-wide Incidents (2021–2024):
- Significant increase in GPS interference reported across multiple European countries starting in 2021.
- Europe-wide GPS Jamming Events: Satellite Source Investigation Summary details the investigation led by Professor Todd Humphreys following a tip-off in November 2024.
- Analysis utilized data from a pan-European network of GPS monitoring stations to trace the source and scope of the interference.
Technical Characteristics
- Mechanism: High-power signal emission on GPS L-band frequencies (L1: 1575.42 MHz, L2: 1227.60 MHz, L5: 1176.45 MHz).
- Impact:
- Civilian navigation disruption.
- Critical infrastructure timing errors (power grids, financial networks).
- Aviation safety risks.
- Detection: Requires specialized receivers capable of measuring signal-to-noise ratio (C/N0) anomalies.
Key Entities & Research
- Todd Humphreys: University of Wisconsin-Madison GPS expert leading significant research into GNSS vulnerability and mitigation.
- European GNSS Agency (GSA): Monitors and reports on GNSS interference incidents.
Related Concepts
- GPS Spoofing
- Electronic Warfare
- Resilient Navigation
- Signal Interference