First attempts to model AIP in fixed-wing EM data

IP effects can distort airborne EM data, usually producing faster decays and, under certain conditions, changes in signal polarity. These effects, if not recognized and treated with a dispersive resistivity model, often lead to artifacts in the resistivities recovered. Commonly, the IP effects in fixed-wing AEM data are not taken into account in the processing and modelling procedure. This mainly because of their geometric configuration (and the system footprint) that does not allow to uniquely relate the negative measurements to the polarization effects. The rapidly accumulating experience on IP effects in helicopter EM systems, however, warrants further research on fixed wing EM and IP modelling for the recorded data. With the current paper we present a first attempt of Airborne Induced Polarization (AIP) modelling for a fixed-wing electromagnetic system and a joint AIP inversion between fixed-wing and helicopter concentric loop platform data. Realistic retrieval of chargeability from fixed-wing data and comparable with VTEM. Joint AIP inversion of these two systems also shows promising results.