G P R

GPR or Ground Penetrating Radar is a geophysical method that is used to image the subsurface of the ground.The method uses microwave band frequencies of the radio spectrum .The electromagnetic radiation in these frequencies detects the signals that are reflected from the subsurface structures and objects Under favorable conditions ,the GPR can be used to detect all the subsurface objects ,gaps ,cracks and changes in properties of the material below

Permitivities

The permitivities of the material below the subsurface reflects ,refracts or scatters the signal thrown back and is caught by an antenna .This data is then concluded to understand the type of material present below.This subsurface utility engineering is used for underground utility surveys as well as archaeological surveys