GROUND PENETRATING RADAR – GPR 

Ground Penetrating Radar (GPR) is a non-invasive technique used in civil engineering to image and analyze underground structures. It sends electromagnetic waves into materials and detects reflections from interfaces with different properties, allowing detailed mapping without excavation. 

GPR performance depends on antenna type and frequency: lower frequencies reach deeper but with less detail, while higher frequencies provide finer images at shallower depths. Systems can be air-coupled or ground-coupled and operate with one or two antennas. 

Choosing the right settings is essential to balance resolution and penetration depth. GPR is widely used for safe, efficient subsurface investigations in various engineering applications.