Does this code repository support electromagnetic fields？

[czg-first]

Does this code repository support electromagnetic fields, such as those used in ground-penetrating radar?

[liufeng2317]

Thank you for your question. The ADFWI repository currently implements full waveform inversion for seismic waves (acoustic and elastic wave equations) and does not include electromagnetic field modeling, such as that required for ground‑penetrating radar (GPR) FWI.

However, the framework is modular, and the automatic differentiation-based design allows the forward modeling operator to be replaced. In principle, by implementing a Maxwell-equation-based forward modeling module in place of the seismic wave operator, the ADFWI framework could be adapted for GPR FWI or other electromagnetic inversion applications.

This would involve providing the appropriate electromagnetic forward solver and ensuring the gradients are computed via the automatic differentiation engine, similar to how seismic FWI is handled.

[czg-first]

I actually tried using PyTorch-based automatic differentiation techniques for 3D GPR FDTD simulations, but the memory consumption was enormous, and using checkpoints significantly reduced the speed. Perhaps this automatic differentiation-based method is difficult to perform full-scale simulations with limited resources.