Noise modulated GPR: Second generation technology

NM-GPR is a new technique which allows the creation of high performance GPR arrays, with the cost and simplicity of an impulse system and the performance of a stepped frequency system. Radar Portal Systems (RPS) had previously developed a prototype high speed 3D GPR system for road assessment based on this technique. This system demonstrated the effectiveness of this approach, allowing penetration to a depth of 1.2 meters for roads, at a speed of 100km/h on 24 channels. Since then, RPS has worked to improve the technique, adding features to improve system performance and allow full channel calibration. As a result, we now have an extra 50dB signal performance in comparison to the previous units, allowing deeper penetration. These new units can also be daisy chained to produce virtually unlimited GPR arrays, while still maintaining full synchronization. This paper describes the features and the performance of these new units.