simpeg.electromagnetics.natural_source.receivers.Impedance.evalDeriv

Impedance.evalDeriv(src, mesh, f, du_dm_v=None, v=None, adjoint=False)

Derivative of data with respect to the fields.

Let \(\mathbf{d}\) represent the data corresponding the receiver object. And let \(\mathbf{u}\) represent the discrete numerical solution of the fields on the mesh. Where \(\mathbf{P}\) is a projection function that maps from the fields to the data, i.e.:

\[\mathbf{d} = \mathbf{P}(\mathbf{u})\]

this method computes and returns the derivative:

\[\dfrac{\partial \mathbf{d}}{\partial \mathbf{u}} = \dfrac{\partial [ \mathbf{P} (\mathbf{u}) ]}{\partial \mathbf{u}}\]

Parameters:

strfrequency_domain.sources.BaseFDEMSrc

The NSEM source.

meshdiscretize.TensorMesh

Mesh on which the discretize solution is obtained.

fsimpeg.electromagnetics.frequency_domain.fields.FieldsFDEM

NSEM fields object for the source.

du_dm_vNone, optional

Supply pre-computed derivative?

vnumpy.ndarray, optional

Vector of size

adjointbool, optional

Whether to compute the ajoint operation.

Returns:

numpy.ndarray

Calculated derivative (n_data,) if adjoint is False, and (n_param, 2) if adjoint is True, for both polarizations.