simpeg.electromagnetics.natural_source.Simulation1DElectricField.getA# Simulation1DElectricField.getA(freq)[source]# System matrix \[\mathbf{A} = \mathbf{G}^\top \mathbf{M}^e_{\mu^{-1}} \mathbf{G} + 1\omega \mathbf{M}^f_\sigma\]