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GPR2004
10th International Conference on Ground Penetrating Radar
75th Anniversary of First GPR Sounding
June 21-24, 2004, Delft, The Netherlands
DOS
version of GRORADAR™ is now freeware
HEALTH/SAFETY/REGULATORY
INFORMATION:
(check out FCC/NTIA restrictions on GPR)
(New NTIA UWB publications January 2001)
FCC/NTIA/IRAC/FDA/OSHA
****************************
>>> FCC Certified New Equipment <<<
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Ground
penetrating radar (GPR, sometimes called ground probing radar, georadar,
subsurface radar, earth sounding radar or "radar terrestre penetrant") is a
noninvasive electromagnetic geophysical technique for subsurface exploration,
characterization and monitoring (history). It is widely
used in locating lost utilities, environmental site characterization and monitoring,
agriculture, archaeological and forensic investigation, unexploded ordnance and land mine
detection, groundwater, pavement and infrastructure characterization, mining, ice
sounding, permafrost, void, cave and tunnel detection, sinkholes, subsidence, karst, and a
host of other applications. It may be deployed from the surface by hand or vehicle, in boreholes,
between boreholes, from aircraft and from satellites. It has the highest resolution of any geophysical
method for imaging the subsurface, with centimeter scale resolution sometimes possible.
Resolution is controlled by
wavelength of the propagating electromagnetic
wave in the ground. Resolution increases with increasing frequency (shorter
wavelength). Depth of investigation varies
from less than one meter in mineralogical clay soils like montmorillonite to more than
5,400 meters in polar ice. Depth of investigation increases with decreasing
frequency but with decreasing resolution. Typical depths of investigation in
fresh-water saturated, clay-free sands are about 30 meters. Depths of investigation
(and resolution) are controlled by electrical properties
through conduction losses, dielectric relaxation in water, electrochemical reactions at
the mineralogical clay-water interface, scattering losses, and
(rarely) magnetic relaxation losses in iron bearing
minerals. Scattering losses are the result of spatial scales of heterogeneity approaching the size of the wavelength in the ground
(like the difference between an ice cube and a snowball in scattering visible
light). Detectability of objects in the
ground depends upon their size, shape, and orientation relative to the antenna, contrast with the host medium, as well as
radiofrequency noise and interferences.
This is representative but greatly oversimplified: see tutorial.
GRORADAR™
data processing, modeling and display software.
Library,
Bibliographic and Data Search Links
Search "ground penetrating radar",
"georadar" or "ground probing radar" on:
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Websites
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AGU
Geophysical Year Calendar
ASCE Events Calendar
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Conference Search
SEG Meetings
Calendar
Society
of Exploration Geophysicists
Annual Meeting 26-31 October 2003 Dallas, Texas USA
(10-15 October 2004 Denver)
GPR2010
13th International Conference on Ground Penetrating Radar
21-25 June 2010 Lecce, Italy
32nd International Geological
Congress
August 2004, Florence, Italy
Society
of Exploration Geophysicists
10-15 October 2004 Denver, Colorado USA
GRORADAR™ Contact
Information:
Postal address: P.O. Box 1520, Golden,
CO
80402-1520 USA
Shipping: 1818 Smith
Road, Golden, CO 80401-1756 USA
Phone:
303-279-7932 Fax: 303-273--9202
Email: golhoeft@g-p-r.com Resume and Publications of Gary R. Olhoeft
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