Processing strategy for 3-D georadar data acquired in areas characterized by rugged topography

B. Heincke, J. Van Der Kruk, A. G. Green, H. Horstmeyer

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingspeer-review

1 Citation (Scopus)

Abstract

Processing 3-D georadar data acquired across rugged terrains is a challenging and time-consuming task. We have recorded 3-D georadar data and corresponding coordinate information on an unstable mountainside in the Swiss Alps. The primary objective was to detect active fracture zones. After passing the data through a conventional processing scheme (i.e. dewow filtering, time-zero alignment, gridding, amplitude scaling, low-pass frequency filtering, and conventional topographic static corrections), the resultant 3-D images were plagued by artificial discontinuities (e.g. anomalous time shifts and signal variations) and data gaps caused by coordinate inaccuracies and radiation pattern distortions associated with the presence of abrupt topographic variations and large boulders. We resolved these problems by passing the data through an adaptive f-xy deconvolution routine followed by f-kx and f-ky filtering. This scheme also reduced incoherent noise. Finally, the data were migrated using a 3-D algorithm that fully accounted for the rugged topography. In the migrated images, a moderately dipping reflector and a suite of prominent point diffractors could be projected to open fracture zones at the surface.

Original languageEnglish
Title of host publicationProceedings of the Tenth International Conference Ground Penetrating Radar, GPR 2004
EditorsE. Slob, A. Yarovoy, J.B. Rhebergen
Pages283-286
Number of pages4
Publication statusPublished - 2004
EventProceedings of the Tenth International Conference Ground Penetrating Radar, GPR 2004 - Delft, Netherlands
Duration: 21 Jun 200424 Jun 2004

Publication series

NameProceedings of the Tenth International Conference Ground Penetrating Radar, GPR 2004
Volume1

Conference

ConferenceProceedings of the Tenth International Conference Ground Penetrating Radar, GPR 2004
Country/TerritoryNetherlands
CityDelft
Period21/06/0424/06/04

Keywords

  • 3-D surface georadar
  • F-xy deconvolution
  • Fracture zone detection
  • Rugged terrain
  • Topographic migration

Programme Area

  • Programme Area 5: Nature and Climate

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