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Proceedings Paper

Influence of the soil on reflections from above surface objects in GPR data
Author(s): J. van der Kruk; Evert C. Slob
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Paper Abstract

During a ground penetrating radar (gpr) survey special attention must be paid to objects which are present above the earth surface. These objects can result in unwanted reflections in the measured data. Due to the low losses in air and the high velocity, these reflected waves can obscure the data and can make the interpretation of gpr data a difficult task. Especially in an urban area it is important to know the origin of these reflections and how to reduce the influence of these unwanted reflections. The radiation characteristics of a horizonal dipole are investigated to determine the sensitivity for reflections coming from an object which is present above the surface. Both the amplitude and polarization of the electric field play an important role. It is shown that the presence of the soil enables relatively strong reflections from vertical objects, which are present in a specific plane relative to the antennas. This analysis indicates that a reduction of the amplitude of unwanted reflections is possible by changing the acquisition parameters. A validation of these expectations is carried out by numerical modeling using a 3D modeling package for different objects present above the surface, which confirms the former expectations that the amplitude of unwanted reflections can be reduced by choosing a proper orientation of the source and receiver.

Paper Details

Date Published: 27 April 2000
PDF: 6 pages
Proc. SPIE 4084, Eighth International Conference on Ground Penetrating Radar, (27 April 2000); doi: 10.1117/12.383611
Show Author Affiliations
J. van der Kruk, Delft Univ. of Technology (Netherlands)
Evert C. Slob, Delft Univ. of Technology (Netherlands)

Published in SPIE Proceedings Vol. 4084:
Eighth International Conference on Ground Penetrating Radar
David A. Noon; Glen F. Stickley; Dennis Longstaff, Editor(s)

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