ImpulseRadar, in conjunction with a local survey company recently conducted Raptor® surveys in Los Angeles, California, as part of a US infrastructure project to evaluate railroad crossings at key intersections.
GPR is a proven non-destructive method for the evaluation of roads and other paved surfaces, because of its ability to detect subsurface defects and measure construction layer thickness. The key advantage of Raptor® is its ability to collect high quality 3D data much faster than any other commercial GPR system. By using a vehicle mounted carrier solution, Raptor® can be deployed quickly and efficiently to survey at speeds more than 130 km/h with 5 cm point intervals. Conventional systems typically operate at no more than 30 km/h, with the same settings.
“There is no question that the speed and resolution of Raptor® is meeting everyone’s expectations,” says Christer Gustafsson, Director of Technical Services at ImpulseRadar.
The density of collected data means that a single pass is all that is needed to obtain high quality 3D information of the line surveyed. Combined with the synchronization of accurate positional data, each survey line, or ‘swath’, can be precisely aligned to adjacent swaths. This optimizes the data gathering process for efficient subsurface mapping.
Christer comments further, “the system speed of Raptor® coupled with GPS is a game changer for sites where GPS is permissible. We anticipated 6-8 days of data collection for Phase I of the project, but we completed this in only 2-days and are now surveying into Phase II. I have been involved with GPR technology for the past 20-years and I have to admit that Raptor® is producing some of the best data I have seen from a 3D array system, with clear advantages over older technology.”