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TISA® 2D Borehole Radar

TISA® 2D Borehole Radar is the geophysicist’s choice for a simple, safe and clear way to receive data about the subsurface. TISA® is can be used in either a reflection mode from a single borehole, or in a transillumination mode from two boreholes. 
Reflection mode
What makes TISA® unique is its primary reflection mode were both antennas are positioned in the same borehole. The transmitted pulses are reflected by the nearby object and is received back by the receiver antenna. The depth of the antenna system and the measured pulse two way travel time defines the 2D position of the detected object.

Urban environments

The TISA® 2D tool can be used in various shallow and deep underground applications where traditional surface radar cannot penetrate and is beyond their range. Dense urban environments present different challenges than open unobstructed areas where GPR is most often used. What if the buried object is under a concrete slab or under a building?
TISA® 2D BHR has the ability to aid the search and the recovery of such targets. In the subsurface when there is a contrast of physical properties between the target and the material in which it is buried, it is possible to isolate and precisely observe where the buried object is located.  


The TISA® 2D tool has been successfully used in a wide range of projects from sink-hole detection, locating concrete walls and even unexploded ordnance (UXO). TISA® 2D is most often used in Europe in identifying and aiding in the recovery of WWII aerial bombs. UXO detection is limited in NorthAmerica but it does demonstrate the tool’s ability to find metal objects liked buried steel drums potentially storing toxic chemicals.

Antenna options
The operator can choose from a range of antennas that best apply to their given application. Collected data is processed using T&A’s property software TISAMap providing unsurpassed accuracy and clarity of results.


TISA 2D can be used in various shallow and deep underground applications where surface radar operation is not feasible, such as:
  • Jetgrout column diameter determination
  • Detection of metal and non metal objects
  • Fracture and void detection
  • Inspection of concrete shaft
  • Hydrogeological surveys
  • Civil engineering
  • Foundation detection
  • Mining

For more information on TISA® 2D please dont hesitate to contact us!

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T&A Survey - Dynamostraat 48 - 1014 BK AMSTERDAM - Tel: 020 6651368 - info@ta-survey.nl