# Seeking assistance with three-dimensional forward modeling using electrical sources to fit with one-dimensional analytical solutions

**URL:** <https://simpeg.discourse.group/t/seeking-assistance-with-three-dimensional-forward-modeling-using-electrical-sources-to-fit-with-one-dimensional-analytical-solutions/567>\
**Category:** Electromagnetics\
**Created:** [April 10, 2024, 6:46am UTC](https://simpeg.discourse.group/t/seeking-assistance-with-three-dimensional-forward-modeling-using-electrical-sources-to-fit-with-one-dimensional-analytical-solutions/567 "2024-04-10T06:46:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![xiao\_mi](https://avatars.discourse-cdn.com/v4/letter/x/8797f3/32.png) [@xiao\_mi](https://simpeg.discourse.group/u/xiao_mi)\
**Post date:** [April 10, 2024, 6:46am UTC](https://simpeg.discourse.group/t/seeking-assistance-with-three-dimensional-forward-modeling-using-electrical-sources-to-fit-with-one-dimensional-analytical-solutions/567/1 "2024-04-10T06:46:15Z")

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Hello, I am a master’s student conducting research on the three-dimensional forward modeling of electromagnetic sources in CSAMT.My excitation source is using an electrical source (LineCurrent), and I am performing forward modeling of magnetic and electric fields using Simulation3DElectricField. However, the forward modeling results do not match the one-dimensional analytical solution for an electric dipole excitation source, with discrepancies of 1-2 orders of magnitude.I’m very confused right now and don’t know what to do. Could you please provide some guidance to help me figure out where I went wrong, or if SIMPGE does not support three-dimensional forward modeling with electrical sources?Whoever can guide me, I would be immensely grateful.  
[mul-freqs-Copy1·-Copy1.ipynb](https://simpeg.discourse.group/uploads/short-url/5PTnK56stVt8YOXOZ1rkuLLESxQ.ipynb) (125.4 KB)