Ground Penetrating Radar: Equipment Spotlight

September 2011, Vol. 66 No. 9
Vermeer's INTERRAGATOR EZ GPR

GPR from Ditch Witch, Geophysical Survey Systems Inc. (GSSI), Underground Imaging Technologies (UIT), MALÅ Geoscience, Sensors & Software, US RADAR,

Ditch Witch
The 2450GR Ground Penetrating Radar system uses radar pulses to image the subsurface and detect both metallic and non-metallic pipes and cables to depths of up to 19 feet. An invaluable tool in utility mapping efforts, the 2450GR is effective in a variety of ground conditions, including rock, soil, pavements and other materials. With 5.6 mph survey speed and digitally controlled radar, the 2450GR provides fast, clear images and accurate surveys whether the operator is pushing or pulling it across any surface. When the surface is uneven, the 2450GR’s dual-frequency, earth-engaged antenna helps maintain signal strength. The advantage of the dual-frequency antenna is that it simultaneously sweeps in two frequencies at depths of up to 19 feet, allowing for one-pass locates. 800.654.6481, ditchwitch.com

Geophysical Survey Systems Inc. (GSSI)
The UtilityScan LT is a lower cost ground penetrating radar solution based on GSSI’s standard UtilityScan. The UtilityScan LT is the perfect entry-level utility locating system. The system allows users to quickly identify the location and depth of underground utilities – gas, communications, sewer lines – and other metallic and non-metallic targets including underground storage tanks and PVC pipes in real-time. 603.893.1109, geophysical.com

Underground Imaging Technologies (UIT)
UIT’s 14-channel GPR system is capable of imaging a 5.12-foot wide data swath in a single pass. Multiple survey passes are performed by the GPR Terravision system to create a three-dimensional data set covering the entire project area. Terravision consists of two banks of seven antennas each with a fixed spacing of 0.4 feet between each antenna module. Data acquired by each of the 14 channels is spaced at 0.08 feet in the direction of travel. The central frequency and approximate bandwidth of each GPR antenna element is 400 MHz, a combination that provides both good penetration and high resolution. Terravision accurately positions data along arbitrary curvi-linear traverses and generates a GPR data set that is sampled in a spatially uniform manner in all directions along the surveyed surface. 518.783.9848, uit-systems.com

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