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Stream EM: Ground Penetrating Radar (GPR)


Stream EM


Improved management of underground utility design, relocation and coordination;

Cost and time reductions: No need to block traffic or perform surveys at night;

Increase in accuracy with a detection accuracy of as little as 5 cm (2 inches);

Increase productivity and have the ability to detect every buried target;

Highly modular structure allows it to be reconfigured to map sidewalks and difficult to access areas;



Stream EM is the multi channel Ground Penetrating Radar solution dedicated to utility locating and mapping.

The solution has been conceived to cover tens of hectares/day obtaining the best utilities detection quality thanks to 40 separate channels. The solution includes double polarized (VV and HH) antennas, to cover wide road surfaces with only longitudinal scans for both longitudinal and transversal pipes detection  maintaining the same maximum data collection speed, 15 Km/h.

The system makes possible what was a dream until now. Imagine mapping all the underground utilities in large areas of dozens of hundreds Km2 and obtain clear and easily enterable result. The high number of antennas increase the quality of the data achievable boosting the reliability of pipes detection.

Stream EM is easily dismountable, enabling it to be transported in a van. It can be reconfigured for mapping sidewalks and difficult areas and can also be easily adapted, by using suitable kits, for other applications (archaeology, environmental, road/runway)

 Stream EM
  • Massive array of 40 antennas in two polarizations: A massive array of 40 antennas ensures a high sampling density. This results in accurate 3D modeling of the subsurface and ease of detecting buried targets and anomalies. The use of both polarizations provides optimal detection of main and junction pipes at the same time.
  • Speed: Stream EM can be towed by a car up to 15 km/h (12mph). This boosts productivity as Stream EM can survey many miles per day, can be operated by 2 people, is able to run continuously without interrupting traffic and allows the crew to remain safe inside the vehicle.
  • Accurate to less than 5 cm (2 inches): Stream EM can be interfaced with GPS or a total station in order to accurately geo-locate the surveyed area and to individually distinguish all the pipes, cables and anomalies detected with high accuracy.
  • Professional Subsurface Utility Engineering (SUE) survey: Automatic transfer to CAD/GIS: Pipes, cables and buried object can be automatically transferred to CAD and GIS format with a proprietary software tool.

Stream EM is supplied with the OneVsion and GRED HD 3D CAD software suites.


OneVision is a new software application for advanced GPR data collection, which provides real-time target viewing, onsite object mapping and GPS navigation. It is a powerful tool for use with an array of antennas when performing utility mapping, archeological and environmental surveys and extensive mapping of medium to large size projects.

OneVision is available for:

  • Stream EM
  • Stream X
  • RIS MF Hi-Mod

OneVision is a powerful application for advanced surveys with integrated navigation, providing:

  • Real-time tomography on a cartographic background (e.g. Google Maps, GeoTIFF and KML);
  • Multi-view screen with GPR radar maps (B-scan and T-scan), radar tomography (C scan) and cartography;
  • Survey planning tools;
  • Special function for the RIS MF Hi-Mod array that allows tomographic merging of transversal and longitudinal swathes;
  • Continuous monitoring of GPR and GPS statuses;
  • Survey management with interactive and on-site target mapping as well as review and editing.

OneVision provides increased productivity and reduced costs:

  • Real-time on-site detection allows immediate decision making;
  • OneVision aids target recognition removing the need for specialist skills;
  • Provision of the tomographic map in real time ensures immediate understanding of complex environments e.g. urban areas;
  • OneVision’s integrated acquisition and navigation functions ensure that complete coverage is always provided in a single visit.



GRED HD 3D CAD is specifically designed to offer an integrated framework for CAD and GIS, combining the characteristics of industrial productivity with high levels of reliability. It also offers unique features such as the creation and display of 2D and 3D tomograms in just a few minutes after the basic filtering of the raw data and the direct export of structures and objects of any generic shape to CAD or GIS maps.

The software is fully compatible with any GPS or positioning data in order to obtain automatically geo-referenced data plots.

Key features include:

  • Real-time display of trajectories using GPS or Total Station.
  • 2D and 3D tomography for an immediate visualization and detection of anomalies.
  • Automated transfer to CAD/GIS: the identified target can be automatically transferred to CAD or GIS maps for professional SUE / utility mapping.
  • Geolocated data information and visualization

Stream EM can be optionally equipped with the GPR-Slice software platform (











Data Logger Panasonic CF30 PC or similar
Radar Control Unit 3 synchronized DAD MCH FastWaves
Number of Channels 40
Antenna Frequency 200 and 600 MHz
Antenna Polarization Horizontal (HH) and Vertical (VV)
Transversal Sampling Full configuration (2 DML + DCL): 6 cm
Positioning Survey wheel, GPS or Total Station (not included)
Collection Speed Up to 15 km/h in full configuration
Power Consumption 100 Watts
Battery Life > 8.0 h
DAD - Connection to Data Logger Ethernet LAN
Surface Footprint Length: 2.02m, Width: 2.10m
Weight (full configuration) 228 kg
Survey Path Width 21.84 meterV
Environment Rain proof
Processing Software GRED 3D Utilities STREAM including:
  • Automatic and manual data processing
  • Propagation velocity estimation (hyperbola fitting)
  • 2D/3D representation
  • Data fusion for different frequencies
  • Interactive 2D data inspector
  • GPS location
  • Irregular volume representation
  • B-scan and C-scan view
  • Color scale/palette
  • GPS markers view
  • Insert targets function
Output Data Automatic data transfer into CAD maps