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GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L21607, doi:10.1029/2004GL021112, 2004

The effect of vertical measurement resolution on the correlation structure of a ground penetrating radar reflection image

Rosemary Knight

Geophysics Department, Stanford University, Stanford, California, USA


Paulette Tercier

Department of Earth and Ocean Sciences, University of British Columbia, Burnaby, British Columbia, Canada


James Irving

Geophysics Department, Stanford University, Stanford, California, USA


Abstract

Geostatistical analysis of a ground penetrating radar reflection image can be used to quantify the maximum correlation direction and the range of horizontal and sub-horizontal radar reflections. A review of previous work, and an analysis of a photograph of layered sediments, suggest that the vertical resolution of a radar image strongly affects its lateral correlation structure. Numerical modeling was used to generate synthetic radar sections and investigate the effect of the vertical resolution of the radar measurement on the link between the correlation structure of the radar reflections and the true correlation structure of subsurface water content. The horizontal range of the radar reflections decreased as the vertical resolution improved, closely matching that of the water content when the vertical resolution was approximately equal to the vertical range of the water content.

Received 26 July 2004; accepted 22 September 2004; published 9 November 2004.

Index Terms: 0694 Electromagnetics: Instrumentation and techniques; 0994 Exploration Geophysics: Instruments and techniques; 1894 Hydrology: Instruments and techniques.

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Citation: Knight, R., P. Tercier, and J. Irving (2004), The effect of vertical measurement resolution on the correlation structure of a ground penetrating radar reflection image, Geophys. Res. Lett., 31, L21607, doi:10.1029/2004GL021112.