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Abstract

Summary

The fixed-wing systems are a very successful family of AEM system, used over the last 2 decades for conductivity mapping at regional and continental scales. This study analyses the sensitivity to Induced Polarization (IP) and the relevance of IP modelling in of fixed-wing systems. We focus on the TEMPESTTM fixed-wing system, given its large application in the world, currently flying the entire Australian Country in the AusEM project. Airborne IP (AIP) modelling has been researched extensively over recent years, mainly in Helicopter Time Domain EM data. The challenges in fixed-wing IP modelling are mostly given by the system geometry, which consists of a towed receiver bird in offset position, and by the flight altitude, around 100m, which could make the IP effects negligible. In this work we investigate the system sensitivity to IP effects through an extensive synthetic sensitivity study. Then, the modelling of real data is carried out: we first compare the TEMPESTTM AIP models with overlapping Helicopter-borne modelling results; then, we extend the AIP modelling to an area of 20000-line km, covering the entire Musgrave Province in Australia. We believe that AIP modelling in fixed-wing systems will improve the interpretability of geology and, possibly, of exploration targets.

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2025-09-07
2026-02-11

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References

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/content/papers/10.3997/2214-4609.202520251
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Airborne Induced Polarization Modelling at Continental Scale using Fixed-Wing EM Systems
Conference Proceedings 2025, 1 (2025); https://doi.org/10.3997/2214-4609.202520251
/content/papers/10.3997/2214-4609.202520251
/content/papers/10.3997/2214-4609.202520251
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