This paper focuses on the sampling of the electromagnetic transient as acquired by airborne TDEM systems. Typically, the sampling of the electromagnetic transient is done using a fixed number of gates whose width grows logarithmically (log-gating). The log-gating has two main benefits: improving the S/N ratio at late times, when the electromagnetic signal has amplitudes equal or lower than the natural background noise, and at same time ensuring a good resolution at the early times. We show, using synthetic models, how different sampling schemes can influence the results of the inversion. We propose a new sampling method, adapting the gating on the base of the slope variations in the EM transient. The use of such an alternative sampling scheme aims to get more accurate inverse models by extracting the geological information from the measured data in an optimal way.

Adaptive sampling of AEM transients

DI MASSA, DOMENICO;FLORIO, GIOVANNI
2015

Abstract

This paper focuses on the sampling of the electromagnetic transient as acquired by airborne TDEM systems. Typically, the sampling of the electromagnetic transient is done using a fixed number of gates whose width grows logarithmically (log-gating). The log-gating has two main benefits: improving the S/N ratio at late times, when the electromagnetic signal has amplitudes equal or lower than the natural background noise, and at same time ensuring a good resolution at the early times. We show, using synthetic models, how different sampling schemes can influence the results of the inversion. We propose a new sampling method, adapting the gating on the base of the slope variations in the EM transient. The use of such an alternative sampling scheme aims to get more accurate inverse models by extracting the geological information from the measured data in an optimal way.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/622432
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