def testRADec(self):
# We won't compare Vmag, because this also needs information on trailing losses.
times = self.jpl['mjdUTC'].unique()
deltaRA = np.zeros(len(times), float)
deltaDec = np.zeros(len(times), float)
for i, t in enumerate(times):
# Find the JPL objIds visible at this time.
j = self.jpl.query('mjdUTC == @t').sort_values('objId')
# Set the ephems, using the objects seen at this time.
suborbits = self.orbits.orbits.query('objId in @j.objId').sort_values('objId')
subOrbits = Orbits()
subOrbits.setOrbits(suborbits)
ephems = PyOrbEphemerides()
ephems.setOrbits(subOrbits)
ephs = ephems.generateEphemerides([t], timeScale='UTC', obscode=807, byObject=False)
deltaRA[i] = np.abs(ephs['ra'] - j['ra_deg'].as_matrix()).max()
deltaDec[i] = np.abs(ephs['dec'] - j['dec_deg'].as_matrix()).max()
# Convert to mas
deltaRA *= 3600. * 1000.
deltaDec *= 3600. * 1000.
# Much of the time we're closer than 1mas, but there are a few which hit higher values.
self.assertTrue(np.max(deltaRA) < 18)
self.assertTrue(np.max(deltaDec) < 6)
self.assertTrue(np.std(deltaRA) < 2)
self.assertTrue(np.std(deltaDec) < 1)
print('max JPL errors', np.max(deltaRA), np.max(deltaDec))
print('std JPL errors', np.std(deltaRA), np.std(deltaDec))
def setUp(self):
self.testdir = os.path.join(getPackageDir('sims_movingObjects'), 'tests/orbits_testdata')
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdir, 'test_orbitsQ.des'))
self.orbitsKEP = Orbits()
self.orbitsKEP.readOrbits(os.path.join(self.testdir, 'test_orbitsA.des'))
self.ephems = PyOrbEphemerides()
def setUp(self):
self.testdir = 'orbits_testdata'
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdir, 'test_orbitsQ.des'))
self.orbitsA = Orbits()
self.orbitsA.readOrbits(os.path.join(self.testdir, 'test_orbitsA.des'))
self.ephems = PyOrbEphemerides()
def setUp(self):
self.testdatadir = os.path.join(getPackageDir('sims_movingObjects'), 'tests/orbits_testdata')
self.scratch_dir = tempfile.mkdtemp(dir=ROOT, prefix='TestChebyValues-')
self.coeffFile = os.path.join(self.scratch_dir, 'test_coeffs')
self.residFile = os.path.join(self.scratch_dir, 'test_resids')
self.failedFile = os.path.join(self.scratch_dir, 'test_failed')
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdatadir, 'test_orbitsNEO.s3m'), skiprows=1)
self.pyephems = PyOrbEphemerides(os.path.join(os.getenv('OORB_DATA'), 'DE405.dat'))
self.pyephems.setOrbits(self.orbits)
self.tStart = self.orbits.orbits.epoch.iloc[0]
self.interval = 30
self.nCoeffs = 14
self.nDecimal = 13
self.chebyFits = ChebyFits(self.orbits, self.tStart, self.interval, ngran=64,
skyTolerance=2.5, nDecimal=self.nDecimal, nCoeff_position=self.nCoeffs,
obscode=807, timeScale='TAI')
self.setLength = 0.5
self.chebyFits.calcSegmentLength(length=self.setLength)
self.chebyFits.calcSegments()
self.chebyFits.write(self.coeffFile, self.residFile, self.failedFile, append=False)
self.coeffKeys = ['objId', 'tStart', 'tEnd', 'ra', 'dec', 'geo_dist', 'vmag', 'elongation']
def setUp(self):
self.testdatadir = 'orbits_testdata'
self.coeffFile = 'test_coeffs'
self.residFile = 'test_resids'
self.failedFile = 'test_failed'
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdatadir, 'test_orbitsNEO.s3m'), skiprows=1)
self.pyephems = PyOrbEphemerides(os.path.join(os.getenv('OORB_DATA'), 'DE405.dat'))
self.pyephems.setOrbits(self.orbits)
self.tStart = self.orbits.orbits.epoch.iloc[0]
self.interval = 15
self.nCoeffs = 14
self.chebyFits = ChebyFits(self.orbits, self.tStart, self.tStart+self.interval, ngran=64,
skyTolerance=2.5, nDecimal=2, nCoeff_position=self.nCoeffs, obscode=807)
self.setLength = 0.5
self.chebyFits.calcSegmentLength(length=self.setLength)
self.chebyFits.calcSegments()
self.chebyFits.write(self.coeffFile, self.residFile, self.failedFile, append=False)
self.coeffKeys = ['objId', 'tStart', 'tEnd', 'ra', 'dec', 'delta', 'vmag', 'elongation']
class TestChebyValues(unittest.TestCase):
def setUp(self):
self.testdatadir = 'orbits_testdata'
self.coeffFile = 'test_coeffs'
self.residFile = 'test_resids'
self.failedFile = 'test_failed'
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdatadir, 'test_orbitsNEO.s3m'), skiprows=1)
self.pyephems = PyOrbEphemerides(os.path.join(os.getenv('OORB_DATA'), 'DE405.dat'))
self.pyephems.setOrbits(self.orbits)
self.tStart = self.orbits.orbits.epoch.iloc[0]
self.interval = 15
self.nCoeffs = 14
self.chebyFits = ChebyFits(self.orbits, self.tStart, self.tStart+self.interval, ngran=64,
skyTolerance=2.5, nDecimal=2, nCoeff_position=self.nCoeffs, obscode=807)
self.setLength = 0.5
self.chebyFits.calcSegmentLength(length=self.setLength)
self.chebyFits.calcSegments()
self.chebyFits.write(self.coeffFile, self.residFile, self.failedFile, append=False)
self.coeffKeys = ['objId', 'tStart', 'tEnd', 'ra', 'dec', 'delta', 'vmag', 'elongation']
def tearDown(self):
del self.orbits
del self.chebyFits
os.remove(self.coeffFile)
os.remove(self.residFile)
if os.path.isfile(self.failedFile):
os.remove(self.failedFile)
def testSetCoeff(self):
# Test setting coefficients directly from chebyFits outputs.
chebyValues = ChebyValues()
chebyValues.setCoefficients(self.chebyFits)
for k in self.coeffKeys:
self.assertTrue(k in chebyValues.coeffs)
self.assertTrue(isinstance(chebyValues.coeffs[k], np.ndarray))
self.assertEqual(len(np.unique(chebyValues.coeffs['objId'])), len(self.orbits))
# This will only be true for carefully selected length/orbit type, where subdivision did not occur.
# For the test MBAs, a len=1day will work. For the test NEOs, a len=0.25 day will work (with 2.5mas skyTol).
#self.assertEqual(len(chebyValues.coeffs['tStart']), (self.interval / self.setLength) * len(self.orbits))
self.assertEqual(len(chebyValues.coeffs['ra'][0]), self.nCoeffs)
self.assertTrue('meanRA' in chebyValues.coeffs)
self.assertTrue('meanDec' in chebyValues.coeffs)
def testReadCoeffs(self):
# Test reading the coefficients from disk.
chebyValues = ChebyValues()
chebyValues.readCoefficients(self.coeffFile)
chebyValues2 = ChebyValues()
chebyValues2.setCoefficients(self.chebyFits)
for k in chebyValues.coeffs:
if k == 'objId':
# Can't test strings with np.test.assert_almost_equal.
np.testing.assert_equal(chebyValues.coeffs[k], chebyValues2.coeffs[k])
else:
# All of these will only be accurate to 2 less decimal places than they are
# print out with in chebyFits. Since vmag, delta and elongation only use 7
# decimal places, this means we can test to 5 decimal places for those.
np.testing.assert_almost_equal(chebyValues.coeffs[k], chebyValues2.coeffs[k],
decimal=5)
def testGetEphemerides(self):
# Test that getEphemerides works and is accurate.
chebyValues = ChebyValues()
#chebyValues.setCoefficients(self.chebyFits)
chebyValues.readCoefficients(self.coeffFile)
time = self.tStart + self.interval / 2.0
# Test for all objects.
ephemerides = chebyValues.getEphemerides(time)
pyephemerides = self.pyephems.generateEphemerides(time, obscode=807,
timeScale='TAI', byObject=False)
# RA and Dec should agree to 2.5mas (skyTolerance above)
pos_residuals = np.sqrt((ephemerides['ra'] - pyephemerides['ra'][0]) ** 2 +
(ephemerides['dec'] - pyephemerides['dec'][0]) ** 2)
pos_residuals *= 3600.0 * 1000.0
self.assertTrue(np.max(pos_residuals) <= 2.5)
# Let's just look at the max residuals in all quantities.
for k in ('ra', 'dec', 'dradt', 'ddecdt', 'delta'):
resids = np.abs(ephemerides[k] - pyephemerides[k][0])
print 'max diff ', k, np.max(resids)
resids = np.abs(ephemerides['elongation'] - pyephemerides['solarelon'][0])
print 'max diff elongation', np.max(resids)
resids = np.abs(ephemerides['vmag'] - pyephemerides['magV'][0])
print 'max diff vmag', np.max(resids)
# Test this for a subset of the objects.
objIds = self.orbits.orbits.objId.head(3).as_matrix()
ephemerides = chebyValues.getEphemerides(time, objIds)
self.assertEqual(len(ephemerides['ra']), 3)
class TestPyOrbEphemerides(unittest.TestCase):
def setUp(self):
self.testdir = os.path.join(getPackageDir('sims_movingObjects'),
'tests/orbits_testdata')
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdir, 'test_orbitsQ.des'))
self.orbitsKEP = Orbits()
self.orbitsKEP.readOrbits(
os.path.join(self.testdir, 'test_orbitsA.des'))
self.ephems = PyOrbEphemerides()
self.ephems.setOrbits(self.orbits)
self.len_ephems_basic = 11
self.len_ephems_full = 34
def tearDown(self):
del self.orbits
del self.orbitsKEP
del self.ephems
def testSetOrbits(self):
# Test that we can set orbits.
self.ephems.setOrbits(self.orbits)
# Test that setting with an empty orbit object fails.
# (Avoids hard-to-interpret errors from pyoorb).
with self.assertRaises(ValueError):
emptyOrb = Orbits()
empty = pd.DataFrame([], columns=self.orbits.dataCols['KEP'])
emptyOrb.setOrbits(empty)
self.ephems.setOrbits(emptyOrb)
def testConvertToOorbArray(self):
# Check that orbital elements are converted.
self.ephems._convertToOorbElem(self.orbits.orbits,
self.orbits.orb_format)
self.assertEqual(len(self.ephems.oorbElem), len(self.orbits))
self.assertEqual(self.ephems.oorbElem[0][7], 2)
self.assertEqual(self.ephems.oorbElem[0][9], 3)
self.assertEqual(self.ephems.oorbElem[0][1],
self.orbits.orbits['q'][0])
# Test that we can convert KEP orbital elements too.
self.ephems._convertToOorbElem(self.orbitsKEP.orbits,
self.orbitsKEP.orb_format)
self.assertEqual(len(self.ephems.oorbElem), len(self.orbitsKEP))
self.assertEqual(self.ephems.oorbElem[0][7], 3)
self.assertEqual(self.ephems.oorbElem[0][1],
self.orbitsKEP.orbits['a'][0])
def testConvertFromOorbArray(self):
# Check that we can convert orbital elements TO oorb format and back
# without losing info (except ObjId -- we will lose that unless we use updateOrbits.)
self.ephems._convertToOorbElem(self.orbits.orbits,
self.orbits.orb_format)
newOrbits = Orbits()
newOrbits.setOrbits(self.orbits.orbits)
newOrbits.updateOrbits(self.ephems.convertFromOorbElem())
self.assertEqual(newOrbits, self.orbits)
def testConvertTimes(self):
times = np.arange(49353, 49353 + 10, 0.5)
ephTimes = self.ephems._convertTimes(times, 'UTC')
# Check that shape of ephTimes is correct. (times x 2)
self.assertEqual(ephTimes.shape[0], len(times))
self.assertEqual(ephTimes.shape[1], 2)
# Check that 'timescale' for ephTimes is correct.
self.assertEqual(ephTimes[0][1], 1)
ephTimes = self.ephems._convertTimes(times, 'TAI')
self.assertEqual(ephTimes[0][1], 4)
def testOorbEphemeris(self):
self.ephems.setOrbits(self.orbits)
times = np.arange(49353, 49353 + 3, 0.25)
ephTimes = self.ephems._convertTimes(times)
# Basic ephemerides.
oorbEphs = self.ephems._generateOorbEphsBasic(ephTimes,
obscode=807,
ephMode='N')
# Check that it returned the right sort of array.
self.assertEqual(
oorbEphs.shape,
(len(self.ephems.oorbElem), len(times), self.len_ephems_basic))
# Full ephemerides
oorbEphs = self.ephems._generateOorbEphsFull(ephTimes,
obscode=807,
ephMode='N')
# Check that it returned the right sort of array.
self.assertEqual(
oorbEphs.shape,
(len(self.ephems.oorbElem), len(times), self.len_ephems_full))
def testEphemeris(self):
# Calculate and convert ephemerides.
self.ephems.setOrbits(self.orbits)
times = np.arange(49353, 49353 + 2, 0.3)
ephTimes = self.ephems._convertTimes(times)
oorbEphs = self.ephems._generateOorbEphsBasic(ephTimes, obscode=807)
# Group by object, and check grouping.
ephs = self.ephems._convertOorbEphsBasic(oorbEphs, byObject=True)
self.assertEqual(len(ephs), len(self.orbits))
# Group by time, and check grouping.
oorbEphs = self.ephems._generateOorbEphsBasic(ephTimes, obscode=807)
ephs = self.ephems._convertOorbEphsBasic(oorbEphs, byObject=False)
self.assertEqual(len(ephs), len(times))
# And test all-wrapped-up method:
ephsAll = self.ephems.generateEphemerides(times,
obscode=807,
ephMode='N',
ephType='basic',
timeScale='UTC',
byObject=False)
np.testing.assert_equal(ephsAll, ephs)
# Reset ephems to use KEP Orbits, and calculate new ephemerides.
self.ephems.setOrbits(self.orbitsKEP)
oorbEphs = self.ephems._generateOorbEphsBasic(ephTimes,
obscode=807,
ephMode='N')
ephsKEP = self.ephems._convertOorbEphsBasic(oorbEphs, byObject=True)
self.assertEqual(len(ephsKEP), len(self.orbitsKEP))
oorbEphs = self.ephems._generateOorbEphsBasic(ephTimes,
obscode=807,
ephMode='N')
ephsKEP = self.ephems._convertOorbEphsBasic(oorbEphs, byObject=False)
self.assertEqual(len(ephsKEP), len(times))
# And test all-wrapped-up method:
ephsAllKEP = self.ephems.generateEphemerides(times,
obscode=807,
ephMode='N',
ephType='basic',
timeScale='UTC',
byObject=False)
np.testing.assert_equal(ephsAllKEP, ephsKEP)
class TestPyOrbEphemerides(unittest.TestCase):
def setUp(self):
self.testdir = os.path.join(getPackageDir('sims_movingObjects'),
'tests/orbits_testdata')
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdir, 'test_orbitsQ.des'))
self.orbitsKEP = Orbits()
self.orbitsKEP.readOrbits(
os.path.join(self.testdir, 'test_orbitsA.des'))
self.ephems = PyOrbEphemerides()
def tearDown(self):
del self.orbits
del self.orbitsKEP
del self.ephems
def testSetOrbits(self):
# Test that we can set orbits.
self.ephems.setOrbits(self.orbits)
assert_frame_equal(self.ephems.orbitObj.orbits, self.orbits.orbits)
# Test that setting with something other than an Orbit object fails.
with self.assertRaises(ValueError):
self.ephems.setOrbits(self.orbits.orbits)
# Test that setting with an empty orbit object fails.
# (Avoids hard-to-interpret errors from pyoorb).
with self.assertRaises(ValueError):
emptyOrb = Orbits()
empty = pd.DataFrame([], columns=self.orbits.dataCols['KEP'])
emptyOrb.setOrbits(empty)
self.ephems.setOrbits(emptyOrb)
def testConvertToOorbArray(self):
# Check that orbital elements are converted.
self.ephems.orbitObj = self.orbits
self.ephems._convertToOorbElem()
self.assertEqual(len(self.ephems.oorbElem), len(self.orbits))
self.assertEqual(self.ephems.oorbElem[0][7], 2)
self.assertEqual(self.ephems.oorbElem[0][9], 3)
self.assertEqual(self.ephems.oorbElem[0][1],
self.orbits.orbits['q'][0])
# Test that we can convert KEP orbital elements too.
self.ephems.orbitObj = self.orbitsKEP
self.ephems._convertToOorbElem()
self.assertEqual(len(self.ephems.oorbElem), len(self.orbitsKEP))
self.assertEqual(self.ephems.oorbElem[0][7], 3)
self.assertEqual(self.ephems.oorbElem[0][1],
self.orbitsKEP.orbits['a'][0])
def testConvertFromOorbArray(self):
self.ephems.orbitObj = self.orbits
self.ephems._convertToOorbElem()
newOrbits = self.ephems._convertFromOorbElem(self.ephems.oorbElem)
self.assertEqual(newOrbits, self.orbits)
def testConvertTimes(self):
times = np.arange(49353, 49353 + 10, 0.5)
ephTimes = self.ephems._convertTimes(times, 'UTC')
# Check that shape of ephTimes is correct.
self.assertEqual(ephTimes.shape[0], len(times))
self.assertEqual(ephTimes.shape[1], 2)
# Check that 'timescale' for ephTimes is correct.
self.assertEqual(ephTimes[0][1], 1)
ephTimes = self.ephems._convertTimes(times, 'TAI')
self.assertEqual(ephTimes[0][1], 4)
def testOorbEphemeris(self):
self.ephems.setOrbits(self.orbits)
times = np.arange(49353, 49353 + 3, 0.25)
ephTimes = self.ephems._convertTimes(times)
oorbEphs = self.ephems._generateOorbEphs(ephTimes, obscode=807)
# Check that it returned the right sort of array.
self.assertEqual(oorbEphs.shape,
(len(self.ephems.oorbElem), len(times), 10))
def testEphemeris(self):
# Calculate and convert ephemerides.
self.ephems.setOrbits(self.orbits)
times = np.arange(49353, 49353 + 2, 0.3)
ephTimes = self.ephems._convertTimes(times)
oorbEphs = self.ephems._generateOorbEphs(ephTimes, obscode=807)
# Group by object, and check grouping.
ephs = self.ephems._convertOorbEphs(oorbEphs, byObject=True)
self.assertEqual(len(ephs), len(self.orbits))
# Group by time, and check grouping.
ephs = self.ephems._convertOorbEphs(oorbEphs, byObject=False)
self.assertEqual(len(ephs), len(times))
# And test all-wrapped-up method:
ephsAll = self.ephems.generateEphemerides(times,
obscode=807,
timeScale='UTC',
byObject=False)
np.testing.assert_equal(ephsAll, ephs)
# Reset ephems to use KEP Orbits, and calculate new ephemerides.
self.ephems.setOrbits(self.orbitsKEP)
oorbEphs = self.ephems._generateOorbEphs(ephTimes, obscode=807)
ephsKEP = self.ephems._convertOorbEphs(oorbEphs, byObject=True)
self.assertEqual(len(ephsKEP), len(self.orbitsKEP))
ephsKEP = self.ephems._convertOorbEphs(oorbEphs, byObject=False)
self.assertEqual(len(ephsKEP), len(times))
# Check that ephemerides calculated by each method are almost equal.
for column in ephs.dtype.names:
np.testing.assert_allclose(ephs[column],
ephsKEP[column],
rtol=0,
atol=1e-7)
# And test all-wrapped-up method:
ephsAllKEP = self.ephems.generateEphemerides(times,
obscode=807,
timeScale='UTC',
byObject=False)
np.testing.assert_equal(ephsAllKEP, ephsKEP)
# Check that the wrapped method using KEP elements and the wrapped method using COM elements match.
for column in ephsAll.dtype.names:
np.testing.assert_allclose(ephsAllKEP[column],
ephsAll[column],
rtol=0,
atol=1e-7)
class TestChebyValues(unittest.TestCase):
def setUp(self):
self.testdatadir = os.path.join(getPackageDir('sims_movingObjects'), 'tests/orbits_testdata')
self.scratch_dir = tempfile.mkdtemp(dir=ROOT, prefix='TestChebyValues-')
self.coeffFile = os.path.join(self.scratch_dir, 'test_coeffs')
self.residFile = os.path.join(self.scratch_dir, 'test_resids')
self.failedFile = os.path.join(self.scratch_dir, 'test_failed')
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdatadir, 'test_orbitsNEO.s3m'), skiprows=1)
self.pyephems = PyOrbEphemerides(os.path.join(os.getenv('OORB_DATA'), 'DE405.dat'))
self.pyephems.setOrbits(self.orbits)
self.tStart = self.orbits.orbits.epoch.iloc[0]
self.interval = 30
self.nCoeffs = 14
self.nDecimal = 13
self.chebyFits = ChebyFits(self.orbits, self.tStart, self.interval, ngran=64,
skyTolerance=2.5, nDecimal=self.nDecimal, nCoeff_position=self.nCoeffs,
obscode=807, timeScale='TAI')
self.setLength = 0.5
self.chebyFits.calcSegmentLength(length=self.setLength)
self.chebyFits.calcSegments()
self.chebyFits.write(self.coeffFile, self.residFile, self.failedFile, append=False)
self.coeffKeys = ['objId', 'tStart', 'tEnd', 'ra', 'dec', 'geo_dist', 'vmag', 'elongation']
def tearDown(self):
del self.orbits
del self.chebyFits
if os.path.exists(self.scratch_dir):
shutil.rmtree(self.scratch_dir)
def testSetCoeff(self):
# Test setting coefficients directly from chebyFits outputs.
chebyValues = ChebyValues()
chebyValues.setCoefficients(self.chebyFits)
for k in self.coeffKeys:
self.assertTrue(k in chebyValues.coeffs)
self.assertTrue(isinstance(chebyValues.coeffs[k], np.ndarray))
self.assertEqual(len(np.unique(chebyValues.coeffs['objId'])), len(self.orbits))
# This will only be true for carefully selected length/orbit type, where subdivision did not occur.
# For the test MBAs, a len=1day will work.
# For the test NEOs, a len=0.25 day will work (with 2.5mas skyTol).
# self.assertEqual(len(chebyValues.coeffs['tStart']),
# (self.interval / self.setLength) * len(self.orbits))
self.assertEqual(len(chebyValues.coeffs['ra'][0]), self.nCoeffs)
self.assertTrue('meanRA' in chebyValues.coeffs)
self.assertTrue('meanDec' in chebyValues.coeffs)
def testReadCoeffs(self):
# Test reading the coefficients from disk.
chebyValues = ChebyValues()
chebyValues.readCoefficients(self.coeffFile)
chebyValues2 = ChebyValues()
chebyValues2.setCoefficients(self.chebyFits)
for k in chebyValues.coeffs:
if k == 'objId':
# Can't test strings with np.test.assert_almost_equal.
np.testing.assert_equal(chebyValues.coeffs[k], chebyValues2.coeffs[k])
else:
# All of these will only be accurate to 2 less decimal places than they are
# print out with in chebyFits. Since vmag, delta and elongation only use 7
# decimal places, this means we can test to 5 decimal places for those.
np.testing.assert_allclose(chebyValues.coeffs[k], chebyValues2.coeffs[k], rtol=0, atol=1e-5)
def testGetEphemerides(self):
# Test that getEphemerides works and is accurate.
chebyValues = ChebyValues()
chebyValues.readCoefficients(self.coeffFile)
# Multiple times, all objects, all within interval.
tstep = self.interval/10.0
time = np.arange(self.tStart, self.tStart + self.interval, tstep)
# Test for a single time, but all the objects.
ephemerides = chebyValues.getEphemerides(time)
pyephemerides = self.pyephems.generateEphemerides(time, obscode=807,
timeScale='TAI', byObject=True)
# RA and Dec should agree to 2.5mas (skyTolerance above)
pos_residuals = np.sqrt((ephemerides['ra'] - pyephemerides['ra']) ** 2 +
((ephemerides['dec'] - pyephemerides['dec']) *
np.cos(np.radians(ephemerides['dec']))) ** 2)
pos_residuals *= 3600.0 * 1000.0
# Let's just look at the max residuals in all quantities.
for k in ('ra', 'dec', 'dradt', 'ddecdt', 'geo_dist'):
resids = np.abs(ephemerides[k] - pyephemerides[k])
if k != 'geo_dist':
resids *= 3600.0 * 1000.0
print('max diff', k, np.max(resids))
resids = np.abs(ephemerides['elongation'] - pyephemerides['solarelon'])
print('max diff elongation', np.max(resids))
resids = np.abs(ephemerides['vmag'] - pyephemerides['magV'])
print('max diff vmag', np.max(resids))
self.assertLessEqual(np.max(pos_residuals), 2.5)
# Test for single time, but for a subset of the objects.
objIds = self.orbits.orbits.objId.head(3).as_matrix()
ephemerides = chebyValues.getEphemerides(time, objIds)
self.assertEqual(len(ephemerides['ra']), 3)
# Test for time outside of segment range.
ephemerides = chebyValues.getEphemerides(self.tStart + self.interval * 2, objIds, extrapolate=False)
self.assertTrue(np.isnan(ephemerides['ra'][0]),
msg='Expected Nan for out of range ephemeris, got %.2e' %(ephemerides['ra'][0]))
class TestPyOrbEphemerides(unittest.TestCase):
def setUp(self):
self.testdir = os.path.join(getPackageDir('sims_movingObjects'), 'tests/orbits_testdata')
self.orbits = Orbits()
self.orbits.readOrbits(os.path.join(self.testdir, 'test_orbitsQ.des'))
self.orbitsKEP = Orbits()
self.orbitsKEP.readOrbits(os.path.join(self.testdir, 'test_orbitsA.des'))
self.ephems = PyOrbEphemerides()
def tearDown(self):
del self.orbits
del self.orbitsKEP
del self.ephems
def testSetOrbits(self):
# Test that we can set orbits.
self.ephems.setOrbits(self.orbits)
assert_frame_equal(self.ephems.orbitObj.orbits, self.orbits.orbits)
# Test that setting with something other than an Orbit object fails.
with self.assertRaises(ValueError):
self.ephems.setOrbits(self.orbits.orbits)
# Test that setting with an empty orbit object fails.
# (Avoids hard-to-interpret errors from pyoorb).
with self.assertRaises(ValueError):
emptyOrb = Orbits()
empty = pd.DataFrame([], columns=self.orbits.dataCols['KEP'])
emptyOrb.setOrbits(empty)
self.ephems.setOrbits(emptyOrb)
def testConvertToOorbArray(self):
# Check that orbital elements are converted.
self.ephems.orbitObj = self.orbits
self.ephems._convertToOorbElem()
self.assertEqual(len(self.ephems.oorbElem), len(self.orbits))
self.assertEqual(self.ephems.oorbElem[0][7], 2)
self.assertEqual(self.ephems.oorbElem[0][9], 3)
self.assertEqual(self.ephems.oorbElem[0][1], self.orbits.orbits['q'][0])
# Test that we can convert KEP orbital elements too.
self.ephems.orbitObj = self.orbitsKEP
self.ephems._convertToOorbElem()
self.assertEqual(len(self.ephems.oorbElem), len(self.orbitsKEP))
self.assertEqual(self.ephems.oorbElem[0][7], 3)
self.assertEqual(self.ephems.oorbElem[0][1], self.orbitsKEP.orbits['a'][0])
def testConvertFromOorbArray(self):
self.ephems.orbitObj = self.orbits
self.ephems._convertToOorbElem()
newOrbits = self.ephems._convertFromOorbElem(self.ephems.oorbElem)
self.assertEqual(newOrbits, self.orbits)
def testConvertTimes(self):
times = np.arange(49353, 49353 + 10, 0.5)
ephTimes = self.ephems._convertTimes(times, 'UTC')
# Check that shape of ephTimes is correct.
self.assertEqual(ephTimes.shape[0], len(times))
self.assertEqual(ephTimes.shape[1], 2)
# Check that 'timescale' for ephTimes is correct.
self.assertEqual(ephTimes[0][1], 1)
ephTimes = self.ephems._convertTimes(times, 'TAI')
self.assertEqual(ephTimes[0][1], 4)
def testOorbEphemeris(self):
self.ephems.setOrbits(self.orbits)
times = np.arange(49353, 49353 + 3, 0.25)
ephTimes = self.ephems._convertTimes(times)
oorbEphs = self.ephems._generateOorbEphs(ephTimes, obscode=807)
# Check that it returned the right sort of array.
self.assertEqual(oorbEphs.shape, (len(self.ephems.oorbElem), len(times), 10))
def testEphemeris(self):
# Calculate and convert ephemerides.
self.ephems.setOrbits(self.orbits)
times = np.arange(49353, 49353 + 2, 0.3)
ephTimes = self.ephems._convertTimes(times)
oorbEphs = self.ephems._generateOorbEphs(ephTimes, obscode=807)
# Group by object, and check grouping.
ephs = self.ephems._convertOorbEphs(oorbEphs, byObject=True)
self.assertEqual(len(ephs), len(self.orbits))
# Group by time, and check grouping.
ephs = self.ephems._convertOorbEphs(oorbEphs, byObject=False)
self.assertEqual(len(ephs), len(times))
# And test all-wrapped-up method:
ephsAll = self.ephems.generateEphemerides(times, obscode=807,
timeScale='UTC', byObject=False)
np.testing.assert_equal(ephsAll, ephs)
# Reset ephems to use KEP Orbits, and calculate new ephemerides.
self.ephems.setOrbits(self.orbitsKEP)
oorbEphs = self.ephems._generateOorbEphs(ephTimes, obscode=807)
ephsKEP = self.ephems._convertOorbEphs(oorbEphs, byObject=True)
self.assertEqual(len(ephsKEP), len(self.orbitsKEP))
ephsKEP = self.ephems._convertOorbEphs(oorbEphs, byObject=False)
self.assertEqual(len(ephsKEP), len(times))
# Check that ephemerides calculated by each method are almost equal.
for column in ephs.dtype.names:
np.testing.assert_allclose(ephs[column], ephsKEP[column], rtol=0, atol=1e-7)
# And test all-wrapped-up method:
ephsAllKEP = self.ephems.generateEphemerides(times, obscode=807,
timeScale='UTC', byObject=False)
np.testing.assert_equal(ephsAllKEP, ephsKEP)
# Check that the wrapped method using KEP elements and the wrapped method using COM elements match.
for column in ephsAll.dtype.names:
np.testing.assert_allclose(ephsAllKEP[column], ephsAll[column], rtol=0, atol=1e-7)
type=str,
default=None,
help=
'List of MJD times for ephemerides (if >1: in quotes, separated by spaces'
)
parser.set_defaults()
args = parser.parse_args()
# Read orbits.
orbits = Orbits()
orbits.readOrbits(args.orbitFile)
print('Read %d orbits, first one with epoch of %f.' %
(len(orbits), orbits.orbits.epoch.iloc[0]))
# Set up ephemeris generation.
pyephems = PyOrbEphemerides()
print(pyephems.ephfile)
# set observatory code
obscode = args.obsCode
# Set up dates to predict ephemerides.
if args.ephTimes is not None:
times = np.array(args.ephTimes.split(), float)
obshistids = np.arange(0, len(times))
elif args.ephTimesFile is not None:
times = pd.read_table(args.ephTimesFile,
delim_whitespace=True,
names=['times'])
times = times['times'].values
