PlasmaCalcs.addons.instability_tools.instability_theory_tools.xarray_mod_vphase

PlasmaCalcs.addons.instability_tools.instability_theory_tools.xarray_mod_vphase(array)

returns magnitude of phase velocity: mod_vphase = |real(omega)| / |k|.

Phase velocity tells wave propagation speed. Group velocity tells wave envelope speed.

For DataArrays, assumes array is an array of real(omega) if real, or omega (if complex).

For Datasets, gets omega from ds[‘omega’].

See also: smod_phase, vphase.