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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.; 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: http://espace.inrs.ca/id/eprint/3735

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