GNSS jamming

GNSS jamming, including GPS jamming, is an act of overwhelming global navigation satellite systems (GNSS) receivers with powerful radio signals that drown out the signals from the GPS, GLONASS, BeiDou, or Galileo satellite constellations. It renders the receiver unable to calculate its position or time accurately. Such jamming can disrupt various GPS-dependent devices, from vehicle and aircraft navigation systems to precision agriculture and mobile phone networks. In civil aviation, GPS jamming can disrupt ADS-B transmission. GPS jamming is a particular type of GNSS interference.

Under ITU rules, countries are obliged to eliminate harmful interference through GPS jamming and GPS spoofing, but the ITU lacks effective enforcement measures. The ICAO legal framework requires that countries should implement appropriate prevention and mitigation of GPS jamming and spoofing. Under the ICAO's Montreal Convention, countries shall make GPS jamming and spoofing punishable. In the United States, the operation, marketing, or sale of any GPS jamming equipment is prohibited under federal law.

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