* The electric-field vector
, E(r), that may result from this [rho](r) in the FAC.
The horizontal component of the geoelectric field is characterized by the intensity of 1-20 V/km and the change period from 10 s to 30 min, the electric-field vector
of this field is oriented mainly towards the meridian [6, 7].
In optics, the state of optical polarization (SOP) is defined as the shape traced out by the electric-field vector
of the transmitted light in a fixed plane.
Such an idealized vector sensor's array manifold (also called unit-power electromagnetic field vector) would be a concatenation of the 3 x 1 electric-field vector
e with the 3 x 1 magnetic-field vector h, to be :