Procesing

Procesing - working with GPR data

 

GPR produces unprocessed phalograms, containg hundreds of superimposing images, distortions, noises and interferences. Data processing is the key task for GPR operator. In order to give us interesting information, data needs to be processed in numerous ways.

The first image is not always readable enough, especially when we are looking for subtle anomalies or when other objects produce noise. Particular fragments need to be extinguished or strenghtened. Therefore the very goal of the examination and the possible sources of useful information must be known.

 

Below is illustrated the step-by-step process of file-filtering, leading to extinguishing or even eilimination of the noise, and strenghtening the weaker signals. The point was to localise a 90cm wide pipe dug at approx. 3 metre. Data was colected using 500 MHz shielted antenna.