'The VDOP is correctly determined from PDOP and HDOP.'

def test_positionAndHorizontalSet(self):

    (pdop, hdop) = (2.0, 1.0)
    vdop = (((pdop ** 2) - (hdop ** 2)) ** 0.5)
    pe = base.PositionError(pdop=pdop, hdop=hdop)
    self._testDOP(pe, pdop, hdop, vdop)
