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import unittest
from ObservationSim.Straylight import Straylight
import numpy as np
import math
import astropy.constants as cons
import galsim
from astropy.table import Table
from scipy import interpolate
import matplotlib.pyplot as plt
hubbleAverZodiacal = {'nuv':0.0035,'u':0.0163,'g':0.1109,'r':0.1471,'i':0.1568,'z':0.0953,'y':0.0283}
hubbleAverEarthShine = {'nuv':0.00024,'u':0.0051,'g':0.0506,'r':0.0591,'i':0.0568,'z':0.0315,'y':0.0090}
def transRaDec2D(ra, dec):
x1 = np.cos(dec / 57.2957795) * np.cos(ra / 57.2957795);
y1 = np.cos(dec / 57.2957795) * np.sin(ra / 57.2957795);
z1 = np.sin(dec / 57.2957795);
return np.array([x1, y1, z1])
def getAngle132(x1=0, y1=0, z1=0, x2=0, y2=0, z2=0, x3=0, y3=0, z3=0):
cosValue = 0;
angle = 0;
x11 = x1 - x3;
y11 = y1 - y3;
z11 = z1 - z3;
x22 = x2 - x3;
y22 = y2 - y3;
z22 = z2 - z3;
tt = np.sqrt((x11 * x11 + y11 * y11 + z11 * z11) * (x22 * x22 + y22 * y22 + z22 * z22));
if (tt == 0):
return 0;
cosValue = (x11 * x22 + y11 * y22 + z11 * z22) / tt;
if (cosValue > 1):
cosValue = 1;
if (cosValue < -1):
cosValue = -1;
angle = math.acos(cosValue);
return angle * 360 / (2 * math.pi);
def calculateAnglePwithEarth(sat = np.array([0,0,0]), pointing = np.array([0,0,0]), sun = np.array([0,0,0])):
modSat = np.sqrt(sat[0]*sat[0] + sat[1]*sat[1]+sat[2]*sat[2])
modPoint = np.sqrt(pointing[0]*pointing[0] + pointing[1]*pointing[1] + pointing[2]*pointing[2])
withLocalZenithAngle = (pointing[0] * sat[0] + pointing[1] * sat[1] + pointing[2] * sat[2]) / (modPoint*modSat)
innerM_sat_sun = sat[0] * sun[0] + sat[1] * sun[1] + sat[2] * sun[2]
cosAngle = innerM_sat_sun / (modSat * cons.au.value/1000)
isInSunSide = 1
if (cosAngle < -0.3385737): #cos109.79
isInSunSide = -1;
elif cosAngle >= -0.3385737 and cosAngle <= 0.3385737:
isInSunSide = 0;
return math.acos(withLocalZenithAngle)*180/math.pi,isInSunSide
class TestStraylight(unittest.TestCase):
def __init__(self, methodName='runTest',datFn = '', filter = 'i', grating = "GI"):
super(TestStraylight,self).__init__(methodName)
self.pointingData = np.loadtxt(datFn, dtype=np.double)
self.filter = filter
self.grating = grating
def test_EarthShineFilter(self):
d_sh = self.pointingData.shape
sl_e_pix = np.zeros([d_sh[0],3],dtype=np.double)
for i in np.arange(d_sh[0]):
# if i > 50:
# continue
ju = self.pointingData[i, 5]
# pointing = transRaDec2D(self.pointingData[i, 0], self.pointingData[i, 1])
# print(ju, pointing, surveylist[i,3:9])
sl = Straylight(jtime=ju, sat_pos=self.pointingData[i, 6:9], pointing_radec=np.array([self.pointingData[i, 0], self.pointingData[i, 1]]),sun_pos=self.pointingData[i,9:12])
e1, py = sl.calculateEarthShineFilter(filter=self.filter)
earthZenithAngle, isInSunSide = calculateAnglePwithEarth(sat=self.pointingData[i, 6:9], pointing= sl.pointing, sun=self.pointingData[i,9:12])
# e2, _ = sl.calculateZodiacalFilter2(filter='i', sun_pos=sl.sun_pos)
# e3 = sl.calculateStarLightFilter(filter='i', pointYaxis=py)
# e_all = sl.calculateStrayLightFilter(filter='i')
# s_pix, spec = sl.calculateStrayLightGrating(grating='GI')
sl_e_pix[i,0] = e1
sl_e_pix[i, 1] = earthZenithAngle
sl_e_pix[i, 2] = isInSunSide
median = np.median(sl_e_pix[:,0])
print(' average Earthshine %s: %e' % (self.filter, median))
self.assertTrue(median-hubbleAverEarthShine[self.filter] < 0.1)
plt.figure()
ids1 = sl_e_pix[:, 2] == 1
ids2 = sl_e_pix[:, 2] != 1
plt.plot(sl_e_pix[ids1, 0], sl_e_pix[ids1, 1], 'r.')
plt.plot(sl_e_pix[ids2, 0], sl_e_pix[ids2, 1], 'b.')
plt.legend(['In Sun Side', 'In Earths shadow'])
plt.xlabel('straylight-earthshine(e-/pixel/s)')
plt.ylabel('Angle with local zenith(degree)')
plt.show()
def test_ZodiacalFilter(self):
d_sh = self.pointingData.shape
sl_e_pix = np.zeros([d_sh[0],2],dtype=np.double)
for i in np.arange(d_sh[0]):
ju = self.pointingData[i, 5]
sl = Straylight(jtime=ju, sat_pos=self.pointingData[i, 6:9], pointing_radec=np.array([self.pointingData[i, 0], self.pointingData[i, 1]]),sun_pos=self.pointingData[i,9:12])
e1, _ = sl.calculateZodiacalFilter2(filter=self.filter, sun_pos=sl.sun_pos)
sl_e_pix[i,0] = e1
sl_e_pix[i,1] = getAngle132(x1=self.pointingData[i,9], y1=self.pointingData[i,10], z1=self.pointingData[i,11], x2=sl.pointing[0],
y2=sl.pointing[1], z2=sl.pointing[2], x3=0, y3=0, z3=0)
plt.figure()
plt.plot(sl_e_pix[:, 0], sl_e_pix[:, 1], 'r.')
plt.xlabel('straylight-zodiacal(e-/pixel/s)')
plt.ylabel('Angle between pointing and sun(degree)')
plt.show()
median = np.median(sl_e_pix[:,0])
print(' average Zodiacal %s: %f' % (self.filter, median))
self.assertTrue(median-hubbleAverZodiacal[self.filter] < 0.1)
def test_StarFilter(self):
d_sh = self.pointingData.shape
sl_e_pix = np.zeros(d_sh[0],dtype=np.double)
tnum = 10
for i in np.arange(tnum):
# if i > 50:
# continue
ju = self.pointingData[i, 5]
# pointing = transRaDec2D(self.pointingData[i, 0], self.pointingData[i, 1])
# print(ju, pointing, surveylist[i,3:9])
sl = Straylight(jtime=ju, sat_pos=self.pointingData[i, 6:9], pointing_radec=np.array([self.pointingData[i, 0], self.pointingData[i, 1]]),sun_pos=self.pointingData[i,9:12])
e1, py = sl.calculateEarthShineFilter(filter=self.filter)
# e2, _ = sl.calculateZodiacalFilter2(filter='i', sun_pos=sl.sun_pos)
e3 = sl.calculateStarLightFilter(filter=self.filter, pointYaxis=py)
# e_all = sl.calculateStrayLightFilter(filter='i')
# s_pix, spec = sl.calculateStrayLightGrating(grating='GI')
sl_e_pix[i] = e3
median = np.median(sl_e_pix[0:tnum])
print(' average Earthshine %s: %e' % (self.filter, median))
self.assertTrue(median-hubbleAverEarthShine[self.filter] < 0.2)
def test_GratingStraylight(self):
d_sh = self.pointingData.shape
sl_e_pix = np.zeros(d_sh[0],dtype=np.double)
tnum = 10
for i in np.arange(tnum):
# if i > 50:
# continue
ju = self.pointingData[i, 5]
# pointing = transRaDec2D(self.pointingData[i, 0], self.pointingData[i, 1])
# print(ju, pointing, surveylist[i,3:9])
sl = Straylight(jtime=ju, sat_pos=self.pointingData[i, 6:9], pointing_radec=np.array([self.pointingData[i, 0], self.pointingData[i, 1]]),sun_pos=self.pointingData[i,9:12])
# e1, py = sl.calculateEarthShineFilter(filter=self.filter)
# e2, _ = sl.calculateZodiacalFilter2(filter='i', sun_pos=sl.sun_pos)
# e3 = sl.calculateStarLightFilter(filter=self.filter, pointYaxis=py)
# e_all = sl.calculateStrayLightFilter(filter='i')
s_pix, spec = sl.calculateStrayLightGrating(grating=self.grating)
sl_e_pix[i] = s_pix
plt.figure()
plt.plot(spec['WAVELENGTH'], spec['FLUX'], 'r')
plt.xlabel('WAVELENGTH')
plt.ylabel('F$\lambda$(erg/s/cm2/A/arcsec2)')
plt.xlim(2000,10000)
plt.show()
median = np.median(sl_e_pix[0:tnum])
print(' average Earthshine %s: %e' % (self.grating, median))
self.assertTrue(median < 0.8)
if __name__ == '__main__':
suit = unittest.TestSuite()
# case1 = TestStraylight('test_EarthShineFilter',datFn = 'Straylight_test.dat', filter = 'i')
# suit.addTest(case1)
# case2 = TestStraylight('test_ZodiacalFilter',datFn = 'Straylight_test.dat',filter = 'i')
# suit.addTest(case2)
# case3 = TestStraylight('test_StarFilter', datFn='Straylight_test.dat', filter='i')
# suit.addTest(case3)
case4 = TestStraylight('test_GratingStraylight', datFn='Straylight_test.dat', grating = 'GI')
suit.addTest(case4)
unittest.TextTestRunner(verbosity=2).run(suit)