Ground Penetrating Radar

Call Sub-Surfacebeforeyoudig!

Who we are

Ground Penetrating Radar Services Since 1988, Sub-Surface Informational Surveys has been an industry leader in the field of ground penetrating radar. Using the most advanced technology, we can provide all of your underground radar needs, immediately on-site. Areas serviced include all of New England, New York, New Jersey and Pennsylvania.

SIS is fully insured, professional and quick to respond to our customers needs. Don't waste your valuable time and money on "fly by night" GPR companies. Do it right the first time, and quickly find what you seek with SIS!


How Does GPR Work?

GPR works by sending a tiny pulse of energy into a material and recording the strength and the time required for the return of any reflected signal. A series of pulses over a single area make up what is called a scan. Reflections are produced whenever the energy pulse enters into a material with different electrical conduction properties or dielectric permittivity from the material it left. The strength, or amplitude, of the reflection is determined by the contrast in the dielectric constants and conductivities of the two materials. This means that a pulse which moves from dry sand (low dielectric) to wet sand (higher dielectric) will produce a very strong reflection, while one moving from dry sand (low dielectric) to limestone (which has a close dielectric value to dry sand) will produce a very weak reflection. While some of the GPR energy pulse is reflected back to the antenna, energy also keeps traveling through the material until the pulse signal energy dissipates (attenuates). The rate of signal attenuation varies widely and is dependent on the dielectric properties of the material through which the pulse is passing.

While some of the GPR energy pulse is reflected back to the antenna, energy also keeps traveling through the material until it either dissipates (attenuates) or the GPR control unit has closed its time window. The rate of signal attenuation varies widely and is dependent on the properties of the material through which the pulse is passing.


Our history

1988

Sub-Surface Informational Surveys, Inc opens its doors

1996

Sub-Surface become the offical sponsor of Second Chance Ranch Equine Rescue.

2008

SIS celebrates their 20th anniversary.



What is GPR?

Ground-penetrating radar (GPR) is a geophysical method that uses radar pulses to image the subsurface. This nondestructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and detects the reflected signals from subsurface structures.

Ground Penetrating Radar

1. Control Unit
2. Antenna
3. Survey Wheel