3D NM-GPR

What is NM-GPR?

NM-GPR (Noise-Modulated Ground Penetrating Radar) is a unique type of ultra-rapid 3D Ground Penetrating Radar developed by CodedRADAR.

Unlike conventional impulse and stepped-frequency GPR systems, NM-GPR uses proprietary coded transmission signals combined with ultra-rapid real-time sampling hardware, and innovative ground-coupled antenna arrays to gather subsurface measurements thousands of times faster than traditional approaches.

The result is a 3D GPR technology capable of simultaneously delivering:

  • Traffic-speed data collection at speeds exceeding 100 km/h (60 mph)
  • High-resolution 3D subsurface imaging
  • Strong penetration depth
  • Dense measurement coverage
  • Reliable operation within regulatory transmission limits

These capabilities allow NM-GPR systems to image roads, airport pavements, bridge decks, utilities, and other infrastructure faster and in greater detail than conventional 3D GPR technologies.

Surface + subsurface

In addition to gathering 3D NM-GPR data, the Kerberos™ and Lynx systems can also capture geolocated surface imagery in the same pass. This provides a wealth of benefits for site investigations, including:

  • Detailed snapshot: Provides a detailed record of current surface conditions throughout a site, to document or monitor changes over time.
  • Relate cause and effect: Compare the location of subsurface defects and subsurface features or changes that may be causing them.
  • Better site context: Use positions of manholes, pits, drainage inlets, bridge joints and other surface features to better inform  & guide interpretation of 3D GPR data.
  • Reliable positioning: As the surface and subsurface images are synchronized, it is possible to locate subsurface features by measuring their location relative to surface features.  This feature is particularly useful for locating voids or defects within ‘urban canyons’ where GPS reception is often unreliable.
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TerraVerse™

CodedRADAR’s TerraVerse™ software enables 3D NM-GPR and surface imagery data from hundreds of scans to be combined into large geospatially-corrected mosaics. This enables large assets such as roads, bridges, airports, ports, parks, gas stations, carparks to be covered in detail and later viewed and analysed as one model, for a holistic understanding of surface and subsurface features.

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Auxiliary sensors

For more than 15 years we have created systems that integrate 3D NM-GPR with cameras and a variety of off-the-shelf and custom sensors. This includes sensors used for transverse laser profiling (e.g. measuring ruts), inertial measurement of vehicle motion (IMU), illuminated road surface imaging (i.e. for site context; mapping surface defects), roughness measurements (IRI), LiDAR, and a patented photometric stereo technique.

When you need advanced sensors that complement and make better use of 3D GPR data, CodedRADAR is your one-stop-shop.

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