geoana.em.tdem.VerticalMagneticDipoleHalfSpace.theta

property VerticalMagneticDipoleHalfSpace.theta

Analog to wavenumber in the frequency domain. See Ward and Hohmann, 1988 pages 174-175:

\[\theta = \sqrt{\frac{\mu \sigma}{4t}}\]

Parameters:

timefloat or numpy.ndarray

propagation time (s)

sigmafloat or numpy.ndarray

electrical conductivity (S/m)

mufloat or numpy.ndarray, optional

magnetic permeability (A/m). Default is the permeability of free-space (\(\mu_0\))

Returns:

float, np.ndarray

The theta value for all times.