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IBIS-FS Plus: Interferometric Radar




Provides accurate measurements even when the system is installed in places with large ground vibrations;

Increase structural health monitoring efficiency through the use of a non-invasive vibration monitoring technique;

Accurate and remote real-time monitoring of structural vibration and natural frequencies;

Reduces the time required for static or dynamic bridge structural testing to just a few minutes;



IBIS-FS Plus is an advanced microwave interferometry based system for remote static and dynamic monitoring of bridges and other structures including buildings, historical monuments and towers. It is an accelerometer version of IBIS-FS that mitigates the effect of large external vibration sources on radar results.



  • Structure load testing;
  • Structure displacement and collapse hazards;
  • Cultural heritage preservation.


  • Structure resonance frequency measurements;
  • Structural modal shape analysis.
  • Remote sensing: Real-time remote sensing at up to 1 km with no need for equipment to be installed on the monitored structure.
  • Accurate measurements: Measures displacements of as little as 0.01mm @ 0.5km range. No standard instrument can achieve such accuracy.
  • Ground vibration removal: Built-in accelerometer to cancel the self-induced vibrations transmitted to the radar from the ground.
  • Sampling: Structural vibration sampling up to 200 Hz.
  • Always operational: Operates day & night and in all weather conditions.

IBIS-FS Plus is equipped with the IBIS Surveyor acquisition software and the IBIS-FS Plus Viewer software for data analysis.

IBIS Surveyor Software

IBIS Surveyor is able to show in real time a power image of the monitored scenario, the displacement of the overall scenario and the displacement of selected points in the scenario. Displacement accuracy can be within 0.01mm.

IBIS Surveyor includes a special tool for IBIS-FS Plus that enables acquisition of the built-in accelerometer’s data to correct for the ground vibrations transmitted via the system’s tripod.

The IBIS Surveyor software is specifically developed to process the raw files generated during measurement sessions by IBIS-FS and IBIS FS Plus. The software is equipped with a complete set of features for the static and dynamic evaluation of the overall structural displacement.

The static information that can be obtained are the power image of the monitored scenario, which allows selection of specific points to be monitored, and the temporal displacement histories of the selected measurement points belonging to the investigated scenario (bridges, dams, landslides, etc.).

Processing of IBIS-FS and IBIS-FS Plus data also includes basic dynamic structural analysis tools to identify the resonance frequencies and modal shapes of the monitored structures.

This information can lead to a complete Structural Health Monitoring system for a structure.

IBIS-FS Plus Viewer

IBIS-FS Plus Viewer is used for data analysis and correction of the ground vibrations transmitted to the system including Frequency Spectrum correction.













Remote Sensing Distance Up to 1 km
Frequency band 17.1-17.3 GHz
Platform Ground-Based
Antennas Horn antennas (20 dB or 15 dB)
Maximum range 0.5 km
Spatial resolution 0.5 m (dependent on local ratio regulation)
Displacement accuracy 0.01 – 0.1 mm (depending on range)
Maximum non-ambiguous displacement 10.0 mm
Acquisition frequency Up to 200 Hz
Power supply SLA batteries 12VDC 12 Ah
Overall Weight (including battery and tripod) 32 kg
Power consumption 28 W
Autonomy 4 hours
Environmental IP65 (radar)
Processing unit Panasonic CF-19 PC with IBIS-FS Plus operating software
Operational Temperature -30°C to +55°C
Certifications CE (Europe), FCC (USA), IC (Canada)
EIRP Power Ku Band Model 26 dBm
IBIS Surveyor:
Acquisition and System
Management Software
  • Acquisition configuration and management
  • Status information
  • Preliminary real-time data processing
  • Data transfer tools
IBIS-FS Plus Viewer:
Data Processing and Interpretation
  • Data processing
  • Output export to external software
  • Analysis and interpretation tools