Ground-based Radar

The Company's experience in Ground Penetration Radar(GPR) extends from the use of simple hand-towed radars to the construction and field operation of sophisticated coherent imaging radars with ground and foliage penetration ability. This company provides consulting and field data acquisition / interpretation services in all fields related to remote sensing, but with particular emphasis on ground and foliage penetration radar. Ancillary services, in support of GPR work include resistively fusion with other remote sensors, site analysis prior to survey, and consulting advice on survey procedures, equipment and extent.

Ground-based GPR was first introduced in the early 1970's and quickly became a commercially available technology. It's early uses were concentrated on utility mapping, archeology and artifact recovery. Research on GPR revealed that it had many limitations, mostly through the conductivity of moist soils causing rapid attenuation of the radar signal, with resultant poor penetration. Figures 1 and 2 show the effects of conductivity and radar frequency on penetration depth





GPR applications vary significantly in their requirements for penetration and resolution, companies performing GPR services need a wide variety of antennas to cover the frequency range. However, since they are readily available through geophysics rental companies it is possible to analyse the survey objectives and rent the best antenna for the job. This does not work however, if the requirements dictate a frequency range or other equipment parameter that is not readily available. IRC fills this gap by designing, building and fielding specialised GPR equipment.

Here are some general links for more information on ground based GPR units;

http://www.ldolphin.org/mycurr.shtml
http://www.g-p-r.com
http://www.cssip.uq.edu.au/staff/noon/gprlist.html
http://www.geophysical.com/applications.htm

For Airborne radar applications, the reader is directed to ;

http://www.sandia.gov/radar/programs.html
http://www.sri.com