1DCSEMQWE: 1D Controlled Source Electromagnetic Method in Geophysics Using Quadrature With Extrapolation

We present a C++ package entitled 1D Controlled Source Electromagnetic Method using Quadrature With Extrapolation (1DCSEMQWE), which computes the electromagnetic field for a one-dimensional model in geophysics. This package supports the computation for both electric and magnetic dipole sources. Transmitters and receivers can be placed anywhere in the layered model. The formulation of the electromagnetic field in the frequency domain avoids using positive exponential terms, leading to higher accuracy. In particular, we introduce a new computation tool using quadrature with extrapolation for integral evaluation. Our tool addresses the numerical error occurring in the previous quadrature rule algorithm and gives users the ability to control the precision of the computed electromagnetic field. ?? 2022 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Automated summary

We present a C++ package called 1D Controlled Source Electromagnetic Method using Quadrature With Extrapolation (1DCSEMQWE) for computing the electromagnetic field of a one-dimensional model in geophysics. This package supports both electric and magnetic dipole sources, and allows transmitters and receivers to be placed anywhere in the layered model. By formulating the electromagnetic field in the frequency domain without positive exponential terms, higher accuracy is achieved. We introduce a new computation tool using quadrature with extrapolation for integral evaluation, effectively addressing numerical errors and providing users with control over the precision of the computed electromagnetic field.