New techniques for removing static shift from CSAMT data based on Fourier transform and Radon transform

DOI

10.2991/iceeg-16.2016.104How to use a DOI?

Keywords

Fourier tranform, Radon transform, CSAMT, static shift

Abstract

This paper proposed two new techniques to reduce the static shift effect in Controlled Source Audio-frequency Magnetotelluric (CSAMT) method in terms of image and signal, by applying Radon transform and Fourier transform, respectively, for data processing. The first method compensates for the static effect in CSAMT data by repositioning the value around " " = 90ø and " " = 270ø in Radon domain. The second method corrects the CSAMT data by smoothening out the low-frequency components, in Fourier domain. We established 3D model to simulate the static shift that occurs when a low resistive body exists near the surface and corrects it with the two methods. We also applied the two methods to real CSAMT data. The study proved that the effects of small-scale scattering caused by inhomogeneity near the surface can be effectively removed by Radon transform method and Fourier transform method.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Xiaodong Luan
AU  - Qingyun Di
PY  - 2016/06
DA  - 2016/06
TI  - New techniques for removing static shift from CSAMT data based on Fourier transform and Radon transform
BT  - Proceedings of the 7th International Conference on Environment and Engineering Geophysics & Summit Forum of Chinese Academy of Engineering on Engineering Science and Technology
PB  - Atlantis Press
SP  - 384
EP  - 387
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceeg-16.2016.104
DO  - 10.2991/iceeg-16.2016.104
ID  - Luan2016/06
ER  -