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Recent AEM case study examples using a full waveform time-domain system for near-surface applications.

Prikhodko, Alexander, Legault, Jean M., Kwan, Karl, Eadie, Timothy, Oldenborger, Greg A., Sapia, Vincenzo, Viezzoli, Andrea V., Gloaguen, Erwan, Smith, Bruce D. et Best, Melvyn E. (2013). Recent AEM case study examples using a full waveform time-domain system for near-surface applications. In: 26th Symposium on the Application of Geophysics to Engineering and Environmental Problems - SAGEEP 2013., 17-21 mars 2013, Denver, États-Unis.

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Résumé

A new time-domain design implementation for the VTEM helicopter time-domain EM system, known as "Full-waveform" VTEM, addresses the early time issues that have been limiting its shallow mapping capability for near-surface applications. The Full-waveform design implementation consists of acombination of a) streamed half-cycle recording of transmitter and receiver waveform data, as well as b) continuous system calibration corrections, b) parasitic-noise and transmitter-drift corrections, and d) ideal-waveform-deconvolution corrections that are applied in a separate post-processing step. This leads to an improvement in usable early time data from ∼100usec in standard VTEM systems to ∼20usec for Full waveform VTEM. This results in a vastly improved near-surface hydrogeologic characterization. The Full-waveform system and theory were previously described by Legault et al. (2012). This paper presents VTEM case-study examples with emphasis on near-surface applications.

Type de document: Document issu d'une conférence ou d'un atelier
Mots-clés libres: continuous system; design implementation; full-waveforms; hydrogeologic characterization; post processing; shallow mapping; time issues; transmitter and receiver
Centre: Centre Eau Terre Environnement
Date de dépôt: 08 mai 2018 18:25
Dernière modification: 08 mai 2018 18:25
URI: https://espace.inrs.ca/id/eprint/3735

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