def METHOD_NAME(self):
    "Vertical polarization should decay in (cos2θ)**2 in vertical plane and no correction in horizontal one"
    self.assertTrue(abs(self.ai.polarization(factor=-1)[6] - numpy.ones(13)).max() == 0, "No correction in the horizontal plane")
    self.assertTrue(abs(self.ai.polarization(factor=-1)[:, 6] - (numpy.cos((2 * self.rotX)) + 1) / 2).max() < self.epsilon, "cos(2th)^2 like in the verical plane")