A New Procedure of Reduction to Pole of Magnetic Data - Improved Noise Rejection Capability
H. Szegedi, A. Kiss, M. Dobróka and J. Somogyi Molnár
Event name: Near Surface Geoscience 2016 - 22nd European Meeting of Environmental and Engineering Geophysics
Session: Modelling, Inversion and Data-processing IV
Publication date: 04 September 2016
Info: Extended abstract, PDF ( 793.1Kb )
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In geophysical research it is an important objective to find more accurate measuring and more effective data processing methods. Measurement data always contain noise, which can mislead the interpreter, or hide useful information. The often used traditional DFT algorithm shows low noise rejection capability. On the other hand there are robust methods to solve the overdetermined inverse problem with excellent noise rejection capabilities. Therefore we suggest a new inversion based Fourier transformation method, where the continuous frequency spectrum is discretized with series expansion and the series expansion coefficients as model parameters are determined in the framework of the Iteratively Reweighted Least Squares (IRLS) algorithm using the so-called Cauchy-Steiner weights. In this paper the method was tested on noisy synthetic magnetic data generated above two magnetic bodies. The results prove the successful applicability of our inversion based S-IRLS-FT algorithm.