Advanced Ground Penetrating Radar

concrete scanning

Advanced Ground Penetrating Radar Services

service overview

Multi-Channel Ground Penetrating Radar (GPR) is a variation of traditional GPR that uses multiple radar antennas simultaneously to collect data. In a multi-channel GPR system, several antennas are arranged in an array or a line and are connected to a control unit.


The main advantage of multi-channel GPR is the ability to collect data from multiple depths and angles simultaneously. This allows for faster data acquisition and improved imaging of the subsurface. By using multiple antennas, multi-channel GPR can provide a more detailed and comprehensive view of the subsurface compared to single-channel GPR.

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Multi-channel GPR is commonly used in applications where high-resolution imaging and accurate subsurface characterization are required. It is often used for concrete condition analysis, structural analysis, geotechnical investigations, archaeological surveys, utility mapping, and environmental assessments.


The data collected by multi-channel GPR is processed and analyzed using specialized software to create detailed subsurface images and profiles. The interpretation of the data requires expertise in GPR data analysis and knowledge of the specific application.


Overall, multi-channel GPR offers enhanced capabilities for subsurface imaging and provides valuable information for various industries and research fields.

What are the Benefits of SFCW Multichannel GPR Data Collections?

Step Frequency Continuous Wave Multi-Channel GPR offers improved depth of penetration, high-resolution imaging, faster data acquisition, versatility, and non-destructive testing capabilities. These benefits make it a valuable tool for various applications that require subsurface imaging and analysis. Step Frequency Continuous wave multi-channel Ground Penetrating Radar (GPR) offers several benefits:

  • Increased Depth of Penetration

    SFCW MC GPR can penetrate deeper into the ground compared to other GPR systems. This allows for the detection of buried objects or structures at greater depths.

  • High Resolution Imaging

    The multi-channel configuration of this GPR system allows for high-resolution imaging of subsurface features. It can provide detailed information about the composition and structure of the subsurface.

  • Improved Signal-to-Noise Ratio

    The use of multiple channels in SFCW MC GPR helps to improve the signal-to-noise ratio. This results in clearer and more accurate imaging of subsurface features.

  • Faster Data Acquisition

    SFCW MC GPR can acquire data at a faster rate compared to other GPR systems. This allows for more efficient and timely surveys of large areas.

  • Versatility

    This GPR system can be used in a wide range of applications, including archaeological surveys, utility mapping, environmental assessments, and geotechnical investigations. It can provide valuable information for various industries and research fields. The data can also be imported into post-processing and CAD programs. AR videos of the data can be taken live on-site through an iPad.

  • Non-Destructive Testing

    SFCW MC GPR is a non-destructive testing method, meaning it does not require excavation or drilling to gather subsurface information. This makes it a cost-effective and environmentally friendly option for subsurface investigations.

  • the GPR imaging of a concrete slab.

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  • the pipes, wires, and utilities within a concrete slab.

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gpr Post processing

GPR (Ground Penetrating Radar) post-processing refers to the analysis and interpretation of data collected from GPR surveys. After collecting GPR data, it is necessary to process and analyze the data to extract meaningful information about subsurface structures and features.


Some common post-processing techniques used in GPR analysis include:

  • Time-slice Analysis

    This technique involves creating a series of horizontal slices at different depths in the GPR data volume. Time-slice analysis helps in visualizing subsurface features and identifying anomalies.

  • Velocity Analysis

    GPR data is affected by the velocity of electromagnetic waves in the subsurface. By analyzing the arrival times of reflections, it is possible to estimate the velocity of the subsurface materials. Velocity analysis is important for accurate depth determination and interpretation of GPR data.

  • Migration

    GPR data is often affected by the presence of complex subsurface structures, such as inclined layers or curved interfaces. Migration techniques are used to correct for these effects and improve the accuracy of the subsurface imaging.

  • Filtering

    GPR data can be affected by noise and unwanted signals. Filtering techniques, such as bandpass filtering or background removal, are used to enhance the signal-to-noise ratio and improve the quality of the data.

  • Interpretation

    Once the data has been processed, it can be interpreted to identify subsurface features such as buried utilities, geological layers, or archaeological artifacts. Interpretation often involves comparing the GPR data with other geophysical or geological information.

Post-processing software packages, such as GPR-Slice, IQ Maps and GPR Insights are commonly used for GPR data analysis and interpretation. These software tools provide a range of processing and visualization functions to help Cobra extract valuable information from GPR data.

subsurface features gpr can detect

Ground Penetrating Radar (GPR) concrete scanners can identify a range of items and features within concrete structures. Some of the most common items and features that GPR can detect include:

  • Rebar

    GPR is highly effective at locating reinforcing bars (rebar) embedded within concrete. It can determine the depth, spacing, and orientation of rebar, which is crucial for construction and renovation projects.


  • Post-Tension Cables

    GPR can detect the presence and layout of post-tension cables in concrete slabs and beams, helping avoid damage during drilling or cutting activities.


  • Conduit and Pipes

    GPR is used to locate electrical conduits, water pipes, gas lines, and other utility conduits embedded within concrete structures. This prevents accidental damage and ensures safety.

  • Voids and Delamination

    GPR can identify voids, gaps, and delamination within concrete, which may indicate structural defects or deterioration.

  • Thickness of Concrete

    GPR can measure the thickness of concrete slabs and determine variations in thickness, which is valuable for assessing structural integrity.


  • Cracks and Fractures

    GPR is capable of detecting cracks, fractures, and discontinuities in concrete, aiding in condition assessment and maintenance planning.

A hard hat is sitting on top of a concrete surface.

Service Specs:

gpr penetration Depth

Dependent upon soil conditions. Generally 3'-6' in clay soils, 8' or better in sandy soils.

Materials Cut

Concrete, Rebar

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gpr concrete scanning FAQs

We've compiled this comprehensive list of frequently asked questions to provide you with quick and informative answers. Whether you're a new customer seeking information about our offerings or a returning customer with inquiries about using our platform, you'll find valuable insights here.

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  • How deep can you see into concrete?

    The antennas Cobra use can penetrate up to 18″ thick concrete on applications with both sides accessible by up to 36″.

  • Is GPR Safe?

    Absolutely. Much like ultrasound, the signals are very high frequency not unlike those of Wi-Fi or cellphones. The equipment is FCC approved and deemed safe for the operator and all persons nearby. It is much safer AND cost effective than X-ray inspections.

  • How Accurate Is GPR?

    On an average 6″ – 8″ slab on grade inspection, targets were located within 1/4″ of their markings laterally and within 1/4″ of their depth estimations. Markings are made as bold and clear as possible unless finished surfaces do not allow. If that is the case, other means are used such as masking tape, pencil, etc.

  • Why is GPR scanning important in construction projects?

    GPR scanning is crucial for locating rebar, post-tension cables, and utilities within concrete, helping to prevent accidental damage, ensure safety, and save time and money during construction.


  • Is GPR scanning effective for assessing the condition of concrete structures?

    Yes, GPR can identify voids, delamination, cracks, and other structural defects, aiding in condition assessment and maintenance planning.

  • How long does a typical GPR scanning project take?

    The duration of a GPR scanning project depends on the size and complexity of the structure. Small projects may take a few hours, while larger ones could take several days.

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