Publication Date:
2022-06-08
Description:
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 a combination 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.
Introduction
Description:
Published
Description:
Denver, Colorado
Description:
2TR. Ricostruzione e modellazione della struttura crostale
Keywords:
time domain electromagnetic methods
;
groundwater
;
airborne electromagnetic
;
inversion
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
Conference paper
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