Python Cn2Profile.zenith_angle_to_airmass示例

示例#1

 def testTheta0OfSingleLayer(self):
     zenAngle = 23.5
     airmass = Cn2Profile.zenith_angle_to_airmass(zenAngle)
     r0 = 0.13
     h = 1000.
     pr = Cn2Profile.from_fractional_j(r0, 1.0, 30, h, 10, 0.3)
     pr.set_zenith_angle(zenAngle)
     pr.set_wavelength(1.0e-6)
     wanted = (2.914 / 0.422727)**(-3. / 5) * pr.r0().value / (
         h * airmass) * Constants.RAD2ARCSEC
     self.assertAlmostEqual(wanted, pr.theta0().value)

示例#2

 def testAirmass(self):
     self.assertAlmostEqual(1, Cn2Profile.zenith_angle_to_airmass(0))
     self.assertAlmostEqual(2, Cn2Profile.zenith_angle_to_airmass(60))
     self.assertAlmostEqual(np.sqrt(2),
                            Cn2Profile.zenith_angle_to_airmass(45))