GNSS Interference

Aircraft-reported navigation degradation. A daily view of possible interference.

Connecting to GPSJAM…

Daily observations · not a real-time jamming detector. Degraded accuracy does not confirm jamming or spoofing.

Observation day · UTC—Completed 24-hour period

Cells with observations—Geographic cells, not unique aircraft

Matching cells—Across the world under selected filters

High indicator · >10%—Matching cells with elevated degradation

Observation day · UTCLeave blank for latest available

Map view

Minimum aircraft count per cell

Degradation indicator

Search by ICAO, IATA, airport name or city. Select a result to inspect observations within 100 km.

Layer OPENSTREETMAP / DAILY SEVERITY Cell outlinesOpacity 75%

Loading map…

Navigation degradationAdjusted indicator · non-linear scale

0%2%10%25%50%100%

Low <2%Medium 2–10%High >10%

Colour represents severity within each observed cell, not aircraft density or jammer power. Unshaded areas may lack observations or be filtered out.

Select a cell to inspect its counts. Colours show daily indicators, not jammer locations.

Weather overlays: SIGMET and AIRMET areas are shown by default. Enable radar, cloud cover, or live weather above. Advisory areas are aviation hazards, not GNSS-interference causes.

SIGMETAIRMETVolcanic-ash SIGMETSIGMET / AIRMET by NOAA Aviation Weather Center

Cell details

Select a heatmap cell to view the observation counts and daily indicator.

DIGITAL OBSERVATION REGISTER

Cells in the current map view

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Cell	Centre · lat, lon	Good / low accuracy	Adjusted indicator	Level
Waiting for observations…

Up to 100 cells, ordered by indicator then sample count. Aircraft may occur in multiple cells; counts must not be summed into a unique aircraft total.

GNSS Interference

Interference severity heatmap

Cell details

Cells in the current map view