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Acknowledgements:
Those of us who regularly use GPR will know of but may ignore the problem of person and cable noise. In a quick experiment in a control environment representatives of the Electrical Engineering Group at the University of Liverpool measured the effect of body and cable position around a shielded antenna. The effect of body position was minor compared with cable position. The results of two arrangements of cable are shown in the attached figure. It suffices to say that attempting any quantitative modelling or image processing on data potentially distorted by such noise will be further complicated. A constant arrangement of cable position with respect to the antenna is clearly important.
Download Geonics Technical Note TN31 (Word doc)
Download Geonics Technical Note TN31 (PostScript file)
If you don't have WinZip click here to visit WinZip site
Message follows: "We know how much the EM geophysical community loves reading our technical notes, so continuing in that tradition I am attaching the latest (only 2 - weeks old) Technical Note called TN-31. One of the purposes of this excellent note is to explain in detail that the claim of a competing commercial multi-frequency instrument, that it is superior to both our EM31 and EM38 for both layered earth geoelectric sounding and the identification of buried metallic targets, is unfounded. If anyone has a problem with the attached file, just write to me and I will forward a copy directly. Mike Catalano, Technical Sales Representative, Geonics Limited, 8-1745 Meyerside Drive, Mississauga, Ontario, L5T 1C6, Canada Tel: (905) 670-9580 Fax: (905) 670-9204 Our new email:geonics@geonics.com URL:http://www.geonics.com"
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