Multi-channel GPR systems use a mobile array of multiple GPR antennas mounted on a cart-based GPR unit, which is typically towed behind a vehicle during survey operations.

Others: IDS Georadar Stream UP GPR, Proceq GP8100, kontur DEEP 1808

One example for instance, consists of 17 GPR antennas positioned in two overlapping rows of 9 transmitters and 8 receivers. This 58 system is collecting 16 channels of densely spaced GPR data. 

GPR imaging with multi-channel systems has greatly improved the areal coverage of the ground. Along with improved imaging software, datasets recorded with multi-channel systems can be processed at similar speeds to coarsely spaced single channel data that would normally require additional time for interpolation processes to fill in the gaps between lines. Case studies of implementation from several different multi-channel GPR systems are shown below.

Ground penetrating radar for buried utilities detection and mapping: a review
https://iopscience.iop.org/article/10.1088/1742-6596/2107/1/012056/pdf

Multichannel 3D Ground Penetrating Radar – Advances in Civil Infrastructure Scanning
https://www.publish.csiro.au/ex/pdf/aseg2015ab039

3D MAPPING OF BURIED PIPES IN MULTI-CHANNEL GPR DATA
https://publica-rest.fraunhofer.de/server/api/core/bitstreams/b5b8b90a-823e-4a82-8c9d-6ed1a556c94c/content

Multichannel GPR Applications for your project
https://rowmanagement.ca/wp-content/uploads/2020/11/2020-Multichannel-GPR-Applications-for-your-project-Jamie-Bradburn-T2-Utility-Engineers.pdf

EFFICIENT LARGE-SCALE UNDERGROUND UTILITY MAPPING USING A NEW MULTI-CHANNEL GROUND-PENETRATING IMAGING RADAR SYSTEM

https://www.mit.edu/~demiller/2002_BirkenEtAl_gpir.pdf

Utility-Locating Technology Development Using Multisensor Platforms

https://nap.nationalacademies.org/read/22274/chapter/4#10