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IBIS-FM: Interferometric Mine Slope Radar




Improved safety for both personnel and equipment;

Reduced production delays due to increased knowledge of the rock mass strength and early warning of slope instability;

Fast alarm response and low false alarm rate due to high spatial resolution and fast scan time;

Reduced service disruptions due to a highly robust construction and a limited number of moving parts;



As open-pit mines get deeper, massive slope failure can occur with little or no warning. In view of this situation, IDS has developed a unique radar system - IBIS-FM - capable of:

  • Continuously measuring mine wall/slope movements with sub-millimeter accuracy from distances up to 4 km;
  • Providing reliable early warning alerts for progressive wall/slope movements than can potentially lead to failure;
  • Mapping the long term evolution of slow moving slopes.

IDS has furnished IBIS-FM with a suite of advanced technologies which overcome the deficiencies of the previous generation of slope radar systems. IBIS-FM now offers the following leading edge features:

  • Highest spatial resolution: 0.5m x 4.4m resolution cell @1 km, resulting in the detection of smaller failure areas.
  • Longest operating range: From 10 m up to 4000 m.
  • Extremely broad coverage of pit walls: Can cover an area of around 5 km2 @ 2 km.
  • Low acquisition time: Just a few minutes for a full resolution scan at long range (2.5 minutes @2 km).
  • Long term monitoring: Through either permanent installations away from blasting restricted areas or by precise re-positioning of the system.
  • Fully self-powered operation: Using a combination of solar panels and batteries, only switching to a diesel generator as a back-up.
  • High in-service availability: A limited number of moving parts and low maintenance requirements help to keep down-time to a minimum.
  • Fully remote operation: Provided by a wire-less radio link.
  • Advanced atmospheric estimation.;
  • Fully tested in harsh mining environments.

Guardian Software

IBIS-FM is supplied along with the Guardian software suite which is specifically designed for critical and background monitoring. Guardian provides automatic real-time processing of radar data, visualization of displacement maps with multiple analysis options (extraction of time series for displacements, velocity, inverse of velocity) and the possibility to create multiple hazard-maps with user-defined alarm criteria for active monitoring.

IBIS Guardian makes use of state-of the art automatic atmospheric correction algorithms to provide accurate and reliable displacement maps which are fully geo-referenced on a digital terrain model.

The capability to handle long-term projects with large datasets makes Guardian also suitable for the long-term tracking of movements which is potentially useful for regulators, the back analysis of slope failure and more comprehensive geotechnical/geological analysis.

  • User friendly intuitive interface
  • Real-time automatic processing
  • Automatic advanced atmospheric corrections
  • Alarm generation with user-defined levels and multiple alarm criteria
  • Long datasets for geotechnical back analysis
  • Fully geo-referenced outputs
  • 3D interactive data handling
  • User defined zones for alarm generation
  • Import of multiple digital layers for displaying geological information
  • Exportability of outputs to mine planning software








Accuracy +/- 0.1 mm (l.o.s.)
Spatial Resolution Range: 0.5 m, Cross Range: 4.4 mrad (@1 km, 0.5 m by 4.4 m; @2 km, 0.5 m by 8.8m)
Area Coverage Extremely broad (e.g. @2 km an area around 5 km2)
Operating Range 10 m to 4000 m
Operating Temperature -20°C to +55°C
Scan Time Less than 3 min
Power Consumption Less than 100 W
Weight 250 kg, depending on the version
Environment IP66
Certifications FCC, CE, IC
The IBIS FM basic configuration, including linear scanner, radar sensor and power supply module, can be provided with the optional tools listed below
Genset Diesel generator controlled by IBIS Controller
Digital Camera High Resolution Digital Camera with dedicated software
Radio Link Wi-fi point-to-point link for data transfer
Radio Link Repeater Radio link repeater for data transfer
Weather Station Weather station controlled by IBIS Controller
IBIS Controller:
Acquisition & system management software
  • Acquisition parameter setting
  • Power supply control
  • Status information
  • Preliminary data processing
  • Data transfer tools
IBIS Guardian:
Real time processing, data interpretation & early warning software
  • Automatic atmospheric correction
  • Alarm generation with user-defined levels
  • Multiple alarm criteria based on area definition
  • 3D interactive data handling
  • Output exportation to mine planning packages
  • External Digital Terrain Model (DTM) importation
Transmitter specifications
Radio-frequency band 17.1-17.3 GHz
Maximum carrier power 12 dBm
Emission bandwidth at a level of minus 30 dB 200 MHz
Relative carrier instability 12×10-6
Out-of-band emissions less than 50 dBm/MHz
Spurious emissions ratio
  • Harmonic components (lower than 3fp): minus 60 dB
  • Harmonic components (higher than 3fp): minus 60 dB
  • Noise emissions level: minus 70 dB
Receiver specifications
Radio-frequency band 17.1-17.3 GHz
Antenna specifications
Beam width at a level of minus 3 dB, deg.
  • In the horizontal plane: 50
  • In the vertical plane: 20
Gain 14 dB