System capable of multiple configurations for detecting and characterizing jammers (SAFIR)


The signals of global navigation satellite systems (GNSS) can be affected by intentional or unintentional interference, known as jamming. This interference can cause systems based on or controlled by a GNSS to function with diminished capacity or to fail altogether. SAFIR technology makes it possible to automatically detect the sources of interference and characterize them, i.e. extract a source’s parameters. A source can thus be recognized easily in the future. Every source of interference detected is archived for further analysis or purposes of documentation. Findings based on archived data will be evaluated and presented in an automated manner.

→ Need for versatile and adaptable detection and characterization of sources of interference

Project objectives

  • Automatic detection and characterization of jammers
  • Support for all GNSS frequency bands, including Galileo Public Regulated Service (PRS)
  • Multiband, bandwidths up to 60 MHz, 8-bit quantization
  • Archiving of identified sources of interference
  • Operation during GNSS installation
  • Different versions: 19-inch, 3HE rack or mobile system (notebook with flexiband data recorder)
  • Open system  
    • Custom specification (frequency bands, bandwidths, dynamics)
    • Custom detection thresholds
    • Incorporation of the user’s own developments/add-ons
    • Availability of the source code

Potential for technology transfer

  • Stationary monitoring and detection of sources of interference in conjunction with existing GNSS stations
  • Operation concurrent with GNSS reference stations, e.g. monitoring of L1/L2 dual-band with 50 MHz or E1/E6 PRS with 50 MHz
  • Mobile operation for measuring campaigns

More information


GNSS receiver technologies

Satellite navigation receivers and antennas for a wide range of applications