GPSJam
Operator: John Wiseman
A daily map of areas with low GNSS position accuracy reported by aircraft.
Transport & Movement
Product
GPSJam, a daily map of position accuracy reported by aircraft.
Availability and source date
Active
As of: 25 October 2026.
Check: 25 October 2026.
Changing the selected date from 24 to 23 October 2026 and viewing the map at 45° N, 35° E.
The URL date changed to 2026-10-23. A world map with red, yellow and green cells over Europe and the Middle East was visible.
Use in OSINT research
Shows areas with concentrations of low GNSS accuracy reports from aircraft. Daily views help examine spatial and temporal changes in possible interference areas.
Queries
| Input | Result | Result type |
|---|---|---|
| Coordinates | A daily map showing the proportion of observed aircraft that reported low position accuracy in the selected area. | Derived |
Features
- Shows daily accuracy reports in coloured map cells.
- Distinguishes low, medium and high proportions of aircraft with low position accuracy.
- Supports selection of historical daily views.
- Aggregates 24 hours of reports from airplanes.live and ADS-B Exchange.
- Updates daily maps every 24 hours according to the operator.
Categories
- Transport & Movement
- Aviation
Coverage
Geographical coverage
Areas with aircraft and receiver coverage
Dataset
ADS-B navigation accuracy reports (NACp) from airplanes.live and ADS-B Exchange. For each map cell, the proportion of observed aircraft with low position accuracy is calculated. The data period begins on 14 February 2022.
Access
Requirements
Publicly accessible in the browser without an account. Date and map area can be selected.
Export
A shareable map view through the URL. File export is not described on the captured product pages.
Provider
John Wiseman
Country of establishment
Unknown
Interfaces
No API, MCP or AI integration is documented.
Limitations
- Coverage depends on aircraft and available receivers.
- Daily views use UTC and are updated shortly after midnight according to the FAQ.
Guides and practical reports
Official · GPSJam: understanding the data and maps
GPSJam · EN
Explains map cells, data sources, UTC days and daily updates.