Compute geometrical factors over the homogeneous half-space with a
        constant electrode spacing

def compute_K_analytical(self, spacing):
        """Compute geometrical factors over the homogeneous half-space with a
        constant electrode spacing
        """
        K = redaK.compute_K_analytical(self.data, spacing=spacing)
        self.data = redaK.apply_K(self.data, K)
        redafixK.fix_sign_with_K(self.data)