An example of 3D conductivity mapping using the TEMPEST airborne electromagnetic system

Lane, Richard; Green, Andrew; Golding, Chris; Owers, M.; Pik, P.; Plunkett, C.; Sattel, Daniel; Thorn, Bob

doi:10.1071/eg00162

Cited by 115 publications

(55 citation statements)

References 15 publications

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“…the fixed wing transient (i.e., time domain) Tempest system [Lane et al, 2000], the frequency domain systems Resolve from Fugro [Mullen et al, 2007], the HEM system of BGR [Siemon, 2009], and the time domain helicopter EM systems like SkyTEM [Sørensen and Auken, 2004].…”

Section: Methodsmentioning

confidence: 99%

Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Viezzoli

Tosi

Teatini³

et al. 2010

Geophysical Research Letters

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[1] A comprehensive investigation of the mixing between salt/fresh surficial water and groundwater in transitional environments is an issue of paramount importance considering the ecological, cultural, and socio-economic relevance of coastal zones. Acquiring information, which can improve the process understanding, is often logistically challenging, and generally expensive and slow in these areas. Here we investigate the capability of airborne electromagnetics (AEM) at the margin of the Venice Lagoon, Italy. The quasi-3D interpretation of the AEM outcome by the spatially constrained inversion (SCI) methodology allows us to accurately distinguish several hydrogeological features down to a depth of about 200 m. For example, the extent of the saltwater intrusion in coastal aquifers and the transition between the upper salt saturated and the underlying fresher sediments below the lagoon bottom are detected. The research highlights the AEM capability to improve the hydrogeological characterization of subsurface processes in worldwide lagoons, wetlands, deltas. Citation: Viezzoli, A., L. Tosi, P. Teatini, and S. Silvestri (2010), Surface water -groundwater exchange in transitional coastal environments by airborne electromagnetics:

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Section: Methodsmentioning

confidence: 99%

Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Viezzoli

Tosi

Teatini³

et al. 2010

Geophysical Research Letters

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“…The geophysical setting is best summarized as a weakly conductive horizontal plate in an electrically neutral, homogeneous halfspace. In this example, a broadband airborne EM system [58] successfully detected very subtle responses associated with changes in conductivity directly related to chemical and physical alteration processes around the unconformity horizon (Fig. 16).…”

Section: Airborne Electromagneticsmentioning

confidence: 99%

“…The example presented here demonstrates the application of a broadband airborne electromagnetic system [58] in defining a paleochannel system and a derived product used to assist the exploration process. Typically, information from the survey is presented in the form of a Conductivity Depth Image (CDI) as shown in Fig.…”

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confidence: 99%

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Correlation of radon and geomagnetic anomalies of the territory of Ukraine

Orlyuk¹,

Марченко²,

Yatsevsky³

2018

Dopov. Nac. akad. nauk Ukr.

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Under the terms of Articles III.A and VIII.C of its Statute, the IAEA is authorized to foster the exchange of scientific and technical information on the peaceful uses of atomic energy. The publications in the IAEA Nuclear Energy Series provide information in the areas of nuclear power, nuclear fuel cycle, radioactive waste management and decommissioning, and on general issues that are relevant to all of the above mentioned areas. The structure of the IAEA Nuclear Energy Series comprises three levels: 1 -Basic Principles and Objectives; 2 -Guides; and 3 -Technical Reports.The Nuclear Energy Basic Principles publication describes the rationale and vision for the peaceful uses of nuclear energy.Nuclear Energy Series Objectives publications explain the expectations to be met in various areas at different stages of implementation.Nuclear Energy Series Guides provide high level guidance on how to achieve the objectives related to the various topics and areas involving the peaceful uses of nuclear energy.Nuclear Energy Series Technical Reports provide additional, more detailed, information on activities related to the various areas dealt with in the IAEA Nuclear Energy Series.The IAEA Nuclear Energy Series publications are coded as follows: NG -general; NP -nuclear power; NF -nuclear fuel; NW -radioactive waste management and decommissioning. In addition, the publications are available in English on the IAEA's Internet site:http://www.iaea.org/Publications/index.html For further information, please contact the IAEA at PO Box 100, Vienna International Centre, 1400 Vienna, Austria.All users of the IAEA Nuclear Energy Series publications are invited to inform the IAEA of experience in their use for the purpose of ensuring that they continue to meet user needs. Information may be provided via the IAEA Internet site, by post, at the address given above, or by email to Official.Mail@iaea.org. ADVANCES IN AIRBORNE AND GROUND GEOPHYSICAL METHODS FOR URANIUM EXPLORATION FOREWORDOne of the IAEA's statutory objectives is to "seek to accelerate and enlarge the contribution of atomic energy to peace, health and prosperity throughout the world". One way this objective is achieved is through the publication of a range of technical series. Two of these are the IAEA Nuclear Energy Series and the IAEA Safety Standards Series.According to Article III.A.6 of the IAEA Statute, the safety standards establish "standards of safety for protection of health and minimization of danger to life and property." The safety standards include the Safety Fundamentals, Safety Requirements and Safety Guides. These standards are written primarily in a regulatory style, and are binding on the IAEA for its own programmes. The principal users are the regulatory bodies in Member States and other national authorities.The IAEA Nuclear Energy Series comprises reports designed to encourage and assist R&D on, and application of, nuclear energy for peaceful uses. This includes practical examples to be used by owners and operators of utilities in Member States, imp...

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“…It is a fixed-wing time-domain system with the transmitter strung around the aircraft and the receiver coils towed in a bird behind and below the aircraft as described by Lane et al (2000). With this setup high acquisition speeds are achieved making it feasible for large and remote area mapping.…”

Section: Introductionmentioning

confidence: 99%

Quantifying the effect of primary field modelling on TEMPEST data - The importance of uncertainty

Christiansen

Auken

Ley-Cooper

et al. 2016

ASEG Extended Abstracts

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SUMMARYThe TEMEPST system is used widely for large-scale mapping. It is a fixed-wing time-domain system with the transmitter strung around the aircraft and the receiver coils towed in a bird behind and below the aircraft. The TEMPEST data are special in the sense that the data are presented as B-field, 100 % duty cycle data. In this process the system self-response is removed, which means that one needs to compute and reinstate the primary field that was removed to accurately model the measured data.In this paper we show that it is crucial to assign uncertainty to the reinstating of the primary field because it can be several orders of magnitude larger than the secondary field especially over resistive grounds and at late times. To quantify the effect of the uncertainty we have produced a number of inversions of a line in the Capricorn survey where we have added different levels of uncertainty when reinstating the primary field. The results have all been produced with the Aarhus Workbench which uses the AarhusInv algorithm and compared with results from the GA-LEI algorithm.We show that reinstating the primary field into the forward calculations is necessary for accurate modelling of TEMPEST responses. Though, to achieve realistic and fitting inversion models (particularly over resistive ground when less signal is measured) it is crucial to allow for a small uncertainty on the primary field when this is reinstated to the forward response. This balances the inversion and allows for misfits in the range of the assumed data noise, which is not possible for the resistive areas without the assumed noise on the primary.

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An example of 3D conductivity mapping using the TEMPEST airborne electromagnetic system

Cited by 115 publications

References 15 publications

Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Surface water–groundwater exchange in transitional coastal environments by airborne electromagnetics: The Venice Lagoon example

Correlation of radon and geomagnetic anomalies of the territory of Ukraine

Quantifying the effect of primary field modelling on TEMPEST data - The importance of uncertainty

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