Data Interpretation

Multi-Frequency GPR systems: Data Comparison (Ground Penetrating Radar)

By August 8, 2017 2 Comments

A recent trend in ground penetrating radar is the emergence of multi-frequency systems. These units have 2 or more GPR antenna on board which provides several benefits:

1. The systems can scan at different depths.

2. The higher frequency antenna will produce higher resolution.

In this video, I show you how a 250 MHz antenna was able to identify a target that the 700 MHz antenna couldn’t because the target was buried too deep for the higher frequency. I also show how the 700 MHz antenna was able to distinguish between multiple targets at shallow depths where the 250 MHz only recorded one reflection.

These benefits can be attained with any system that has multiple antennae that can be swapped in and out and all users should attempt to accumulate antenna with different frequencies so you can use the right tool for the right job. BUT, one other benefit to multi-frequency systems is:

3.That it reduces data collection times since 2 or more antenna are collecting at the same time.

This helps reduce some of the guesswork and experimentation that is sometimes need with systems where you have to swap out antenna.

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Go to http://learngpr.com to sign up for our free Introductory Training Video on Ground Penetrating Radar (GPR).

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Join the discussion 2 Comments

  • Chris van Isselt says:

    Thanks Dan, very good examples of the multi-frequency antenna’s. We have an antenna array with four antenna’s, 2 x 250 MHz and 2 x 650 MHz. This way you can scan simultaneously with the low and high frequency antenna’s. It is a 2 m wide array, only possible to use on large areas.
    The brand is IDS, see: http://idsgeoradar.com/products/ground-penetrating-radar/ris-mf-hi-mod

    Best regards,
    Chris van Isselt

    P.S.: Thanks for all the GPR video’s, I like them. Please keep on going with that, there are very helpful for training our GPR operators.

    • dpbigman says:

      Hi Chris,

      Thanks so much for the comment. I’m glad you like the videos and use them to train your operators.

      I like the IDS products too. The data from the video was collected with a Leica Geosystems DS 2000 which is basically the IDS opera Duo.

      I figured that very few data set’s that I have seen from people don’t even get at the reasons for using the multi frequency. So I decided to go ahead and make a video about it.

      Keep on watching and thanks again.

      Dan