Is GPR a safe technique?
Yes. While "Ground
Penetrating Radar" may sound like a hazardous technique, it is
extremely safe and emits roughly 1% of the power of a cellular
Can GPR locate non-metallic subsurface
Yes. Because GPR works differently from a metal
detector, it can accurately locate both metallic and non-metallic
How deep can GPR "see" to locate
Penetration depth depends greatly on the material
being surveyed and the antenna being used. Lower frequency antennas
can penetrate further but with a lower resolution. In general, dry
sandy soils with little salt content return excellent survey
resolution, but heavy clay-based soils are difficult to penetrate
with GPR. In some situations, penetration depth may be limited to a
few feet or less within clays, whereas pipes residing in sandy soils
could be detected at depths up to 30 feet. Penetration depth for
concrete is typically 18" or more.
Can GPR be used with survey data?
Yes. Our GPR
systems work seamlessly with coordinate data collected through
engineering surveys. The resulting data file links each target with
its coordinates for use in creating drawings and CAD files.
Does GPR interfere with the operation of any other
With any transmitter, there is always a risk of
interference; however, Atlantic Subsurface Imaging's FCC certified
equipment emits very low powered electromagnetic pulses, which are
heavily attenuated and dispersed by the material being scanned. With
Antennas contacting the surface of the ground or structure being
surveyed, all transmitted EM energy is directed into the ground or
structure; no radiated energy is transmitted to the surrounding
area. According to GSSI, the manufacturer of our equipment, at no
time in the past 30 years has the FCC recorded any GPR interference
with other receivers.
Does any equipment interfere with the operation of
Since GPR operates by transmitting and receiving
electromagnetic (EM) energy at a particular frequency, cellular
phones, two-way radios and pagers should be turned off as they also
transmit EM energy and will interfere with a survey. If you must
have them on, it is essential to keep these devices at least 25-30
feet away from the antenna. Heavy electrical motors and transformers
can also potentially cause interference.