def testOffset(self):
"""Test offset, angularSeparation and orientationTo for offsets over a wide range of angles
"""
for fromPolarAng in (-87.1, -25.5, 0.43, 36.7, 87.0):
for fromEquatAng in (0, 41.0): # should not matter
fromCoord = Coord(fromEquatAng, fromPolarAng)
for fromOrient in (-89.9, -45.0, 0.01, 12.5, 89.0, 90.0):
for dist in (0.0001, 0.01, 0.13, 5.73):
sideA = 90.0 - fromPolarAng
angB = 90.0 - fromOrient
sideC = dist
unknownAng, angA, sideB, angC = angSideAng(sideA, angB, sideC)
self.assertFalse(unknownAng)
predEquatAng = fromEquatAng + angC
predPolarAng = 90 - sideB
predAng = angA - 90
toCoord, toOrient = fromCoord.offset(fromOrient, dist)
atPole, toEquatAng, toPolarAng = toCoord.getSphPos()
places = 7
self.assertAlmostEqual(toEquatAng, predEquatAng, places=places)
self.assertAlmostEqual(toPolarAng, predPolarAng, places=places)
self.assertAlmostEqual(toOrient, predAng, places=places)
fromCoord = Coord(fromEquatAng, fromPolarAng)
toCoord = Coord(toEquatAng, toPolarAng)
self.assertAlmostEqual(dist, fromCoord.angularSeparation(toCoord))
self.assertAlmostEqual(fromOrient, fromCoord.orientationTo(toCoord))
self.assertAlmostEqual(toOrient, wrapNear(180 + toCoord.orientationTo(fromCoord), toOrient))
def testOffsetSmall(self):
"""Test offset, angularSeparation and orientationTo for small offsets not too near the pole
In this regime delta-long = dist along long / cos(lat) is a reasonable approximation
but I have no simple way to compute toOrient, except if dist very small then toOrient = fromOrient
"""
for fromPolarAng in (-40.0, 0.43, 36.7):
cosPolarAng = cosd(fromPolarAng)
for fromEquatAng in (0, 41.0): # should not matter
fromCoord = Coord(fromEquatAng, fromPolarAng)
for fromOrient in (-90, -72, -45.0, -30, 0.01, 12.5, 31, 47,
56, 68, 89):
cosFromOrient = cosd(fromOrient)
sinFromOrient = sind(fromOrient)
for dist in (0, 1e-12, 1e-11, 1e-10, 1e-9, 1e-8, 1e-7,
1e-5, 0.001, 0.01, 0.13):
predEquatAng = fromEquatAng + (dist * cosFromOrient /
cosPolarAng)
predPolarAng = fromPolarAng + (dist * sinFromOrient)
toCoord, toOrient = fromCoord.offset(fromOrient, dist)
atPole, toEquatAng, toPolarAng = toCoord.getSphPos()
if abs(dist) > 0.1:
places = 3
else:
places = 5
if abs(dist) < 0.0001:
orientPlaces = 4
else:
orientPlaces = 7
self.assertAlmostEqual(toEquatAng,
predEquatAng,
places=places)
self.assertAlmostEqual(toPolarAng,
predPolarAng,
places=places)
fromCoord = Coord(fromEquatAng, fromPolarAng)
toCoord = Coord(toEquatAng, toPolarAng)
self.assertAlmostEqual(
dist, fromCoord.angularSeparation(toCoord))
predFromOrient = fromCoord.orientationTo(toCoord)
if numpy.isfinite(predFromOrient):
self.assertAlmostEqual(fromOrient,
predFromOrient,
places=orientPlaces)
self.assertAlmostEqual(
toOrient,
wrapNear(
180 + toCoord.orientationTo(fromCoord),
toOrient),
places=orientPlaces)
else:
self.assertLess(dist, 1e-7)
self.assertAlmostEqual(fromEquatAng, toEquatAng)
self.assertAlmostEqual(fromPolarAng, toPolarAng)
self.assertAlmostEqual(fromOrient, toOrient)
def testWrap(self):
for wrap in (-1000, -10, -1, 0, 1, 10, 1000):
for offset in (-360, -180, -90, 0, 90, 180, 270, 360):
for epsMult in (-3, -2, -1, 0, 1, 2, 3):
ang = offset + (wrap * 360)
ang += ang * DoubleEpsilon * epsMult
sinAng = sind(ang)
cosAng = cosd(ang)
pvt = PVT(ang, ang, 35.0) # pick anything for vel and time
posAng = wrapPos(ang)
self.assertGreaterEqual(posAng, 0.0)
self.assertLess(posAng, 360.0)
# prove that posAng and ang are the same angle
# sin and cos are a sanity check on wrapCtr
self.assertAlmostEqual(wrapCtr(posAng - ang), 0)
self.assertAlmostEqual(sind(posAng), sinAng)
self.assertAlmostEqual(cosd(posAng), cosAng)
posPvt = wrapPos(pvt)
self.assertEqual(posPvt.pos, posAng)
self.assertEqual(posPvt.vel, pvt.vel)
self.assertEqual(posPvt.t, pvt.t)
ctrAng = wrapCtr(ang)
self.assertGreaterEqual(ctrAng, -180.0)
self.assertLess(ctrAng, 180.0)
# prove that ctrAng and ang are the same angle
self.assertAlmostEqual(wrapCtr(ctrAng - ang), 0)
self.assertAlmostEqual(sind(ctrAng), sinAng)
self.assertAlmostEqual(cosd(ctrAng), cosAng)
ctrPvt = wrapCtr(pvt)
self.assertEqual(ctrPvt.pos, ctrAng)
self.assertEqual(ctrPvt.vel, pvt.vel)
self.assertEqual(ctrPvt.t, pvt.t)
for refAngBase in (-180, 0, 180, 360):
for refEpsMult in (-3, -2, -1, 0, 1, 2, 3):
refAng = refAngBase
refAng += refAng * refEpsMult * DoubleEpsilon
nearAng = wrapNear(ang, refAng)
self.assertGreaterEqual(nearAng - refAng, -180)
self.assertLess(nearAng - refAng, 180)
# prove that nearAng and ang are the same angle
self.assertAlmostEqual(wrapCtr(nearAng - ang), 0)
self.assertAlmostEqual(sind(nearAng), sinAng)
self.assertAlmostEqual(cosd(nearAng), cosAng)
def testWrap(self):
for wrap in (-1000, -10, -1, 0, 1, 10, 1000):
for offset in (-360, -180, -90, 0, 90, 180, 270, 360):
for epsMult in (-3, -2, -1, 0, 1, 2, 3):
ang = offset + (wrap * 360)
ang += ang * DoubleEpsilon * epsMult
sinAng = sind(ang)
cosAng = cosd(ang)
pvt = PVT(ang, ang, 35.0) # pick anything for vel and time
posAng = wrapPos(ang)
self.assertGreaterEqual(posAng, 0.0)
self.assertLess(posAng, 360.0)
# prove that posAng and ang are the same angle
# sin and cos are a sanity check on wrapCtr
self.assertAlmostEqual(wrapCtr(posAng - ang), 0)
self.assertAlmostEqual(sind(posAng), sinAng)
self.assertAlmostEqual(cosd(posAng), cosAng)
posPvt = wrapPos(pvt)
self.assertEqual(posPvt.pos, posAng)
self.assertEqual(posPvt.vel, pvt.vel)
self.assertEqual(posPvt.t, pvt.t)
ctrAng = wrapCtr(ang)
self.assertGreaterEqual(ctrAng, -180.0)
self.assertLess(ctrAng, 180.0)
# prove that ctrAng and ang are the same angle
self.assertAlmostEqual(wrapCtr(ctrAng - ang), 0)
self.assertAlmostEqual(sind(ctrAng), sinAng)
self.assertAlmostEqual(cosd(ctrAng), cosAng)
ctrPvt = wrapCtr(pvt)
self.assertEqual(ctrPvt.pos, ctrAng)
self.assertEqual(ctrPvt.vel, pvt.vel)
self.assertEqual(ctrPvt.t, pvt.t)
for refAngBase in (-180, 0, 180, 360):
for refEpsMult in (-3, -2, -1, 0, 1, 2, 3):
refAng = refAngBase
refAng += refAng * refEpsMult * DoubleEpsilon
nearAng = wrapNear(ang, refAng)
self.assertGreaterEqual(nearAng - refAng, -180)
self.assertLess(nearAng - refAng, 180)
# prove that nearAng and ang are the same angle
self.assertAlmostEqual(wrapCtr(nearAng - ang), 0)
self.assertAlmostEqual(sind(nearAng), sinAng)
self.assertAlmostEqual(cosd(nearAng), cosAng)
def testOffsetSmall(self):
"""Test offset, angularSeparation and orientationTo for small offsets not too near the pole
In this regime delta-long = dist along long / cos(lat) is a reasonable approximation
but I have no simple way to compute toOrient, except if dist very small then toOrient = fromOrient
"""
for fromPolarAng in (-40.0, 0.43, 36.7):
cosPolarAng = cosd(fromPolarAng)
for fromEquatAng in (0, 41.0): # should not matter
fromCoord = Coord(fromEquatAng, fromPolarAng)
for fromOrient in (-90, -72, -45.0, -30, 0.01, 12.5, 31, 47, 56, 68, 89):
cosFromOrient = cosd(fromOrient)
sinFromOrient = sind(fromOrient)
for dist in (0, 1e-12, 1e-11, 1e-10, 1e-9, 1e-8, 1e-7, 1e-5, 0.001, 0.01, 0.13):
predEquatAng = fromEquatAng + (dist * cosFromOrient / cosPolarAng)
predPolarAng = fromPolarAng + (dist * sinFromOrient)
toCoord, toOrient = fromCoord.offset(fromOrient, dist)
atPole, toEquatAng, toPolarAng = toCoord.getSphPos()
if abs(dist) > 0.1:
places = 3
else:
places = 5
if abs(dist) < 0.0001:
orientPlaces = 4
else:
orientPlaces = 7
self.assertAlmostEqual(toEquatAng, predEquatAng, places=places)
self.assertAlmostEqual(toPolarAng, predPolarAng, places=places)
fromCoord = Coord(fromEquatAng, fromPolarAng)
toCoord = Coord(toEquatAng, toPolarAng)
self.assertAlmostEqual(dist, fromCoord.angularSeparation(toCoord))
predFromOrient = fromCoord.orientationTo(toCoord)
if numpy.isfinite(predFromOrient):
self.assertAlmostEqual(fromOrient, predFromOrient, places=orientPlaces)
self.assertAlmostEqual(toOrient, wrapNear(180 + toCoord.orientationTo(fromCoord), toOrient), places=orientPlaces)
else:
self.assertLess(dist, 1e-7)
self.assertAlmostEqual(fromEquatAng, toEquatAng)
self.assertAlmostEqual(fromPolarAng, toPolarAng)
self.assertAlmostEqual(fromOrient, toOrient)
def testOffset(self):
"""Test offset, angularSeparation and orientationTo for offsets over a wide range of angles
"""
for fromPolarAng in (-87.1, -25.5, 0.43, 36.7, 87.0):
for fromEquatAng in (0, 41.0): # should not matter
fromCoord = Coord(fromEquatAng, fromPolarAng)
for fromOrient in (-89.9, -45.0, 0.01, 12.5, 89.0, 90.0):
for dist in (0.0001, 0.01, 0.13, 5.73):
sideA = 90.0 - fromPolarAng
angB = 90.0 - fromOrient
sideC = dist
unknownAng, angA, sideB, angC = angSideAng(
sideA, angB, sideC)
self.assertFalse(unknownAng)
predEquatAng = fromEquatAng + angC
predPolarAng = 90 - sideB
predAng = angA - 90
toCoord, toOrient = fromCoord.offset(fromOrient, dist)
atPole, toEquatAng, toPolarAng = toCoord.getSphPos()
places = 7
self.assertAlmostEqual(toEquatAng,
predEquatAng,
places=places)
self.assertAlmostEqual(toPolarAng,
predPolarAng,
places=places)
self.assertAlmostEqual(toOrient,
predAng,
places=places)
fromCoord = Coord(fromEquatAng, fromPolarAng)
toCoord = Coord(toEquatAng, toPolarAng)
self.assertAlmostEqual(
dist, fromCoord.angularSeparation(toCoord))
self.assertAlmostEqual(
fromOrient, fromCoord.orientationTo(toCoord))
self.assertAlmostEqual(
toOrient,
wrapNear(180 + toCoord.orientationTo(fromCoord),
toOrient))
def testFile(self):
"""Test file of coordinate conversions from TCC (data/masscc_out.dat)
Known issues:
- radVel does not match; the TCC seems to zero radVel if at infinity, but why?
Also, the TCC seems to be able to round trip RadVel even if at infinity, but how,
if it zeros it when at infinity? Once I resolve this, update the testCoord.py
accordingly, as well as this code.
- Other problems await at other coordinate systems.
"""
site = None
numErrors = 0
with file(DataFile, "rU") as f:
gotSiteData = False
startTime = time.time()
nTested = 0
for lineInd, line in enumerate(f):
line = line.strip()
if not line or line.startswith("#"):
continue
if not gotSiteData:
meanLat, meanLong, elevation, ut1_tai, poleX, poleY = [float(val) for val in line.split()]
site = coordConv.Site(meanLong, meanLat, elevation)
site.setPoleWander(poleX, poleY)
site.ut1_tai = ut1_tai
gotSiteData = True
continue
dataList = line.split()
fromSysCode, fromDate, fromPos1, fromPos2, fromPM1, fromPM2, fromParallax, fromRadVel, fromDir, refCoA, refCoB, \
toSysCode, toDate, refToPos1, refToPos2, refToPM1, refToPM2, refToParallax, refToRadVel, \
refToDir, refScaleChange, refAtInf, refAtPole, isOK, tai, last \
= [cnvFunc(val) for val, cnvFunc in itertools.izip(dataList, CnvList)]
if not isOK:
print "Skipping line %s: %s; isOK false" % (lineInd + 1, line)
if (fromSysCode == 1) and (fromRadVel != 0) and (fromPM1 == 0) and (fromPM2 == 0):
print "Skipping line %s; FK4 with zero PM and nonzero radVel" % (lineInd + 1,)
continue
nTested += 1
fromCoord = coordConv.Coord(fromPos1, fromPos2, fromParallax, fromPM1, fromPM2, fromRadVel)
fromPVTCoord = coordConv.PVTCoord(fromCoord, fromCoord, tai, 0.01)
fromPVTDir = coordConv.PVT(fromDir, 0, tai)
fromCoordSys = getCoordSys(fromSysCode, fromDate, tai)
toCoordSys = getCoordSys(toSysCode, toDate, tai)
site.refCoA = refCoA
site.refCoB = refCoB
try:
toCoord, toDir, scaleChange = toCoordSys.convertFrom(fromCoordSys, fromCoord, fromDir, site)
toPVTDir = coordConv.PVT()
toPVTCoord, scaleChange2 = toCoordSys.convertFrom(toPVTDir, fromCoordSys, fromPVTCoord, fromPVTDir, site)
except Exception:
print "Failed on line %s: %s\n" % (lineInd + 1, line)
raise
atPole, toPos1, toPos2 = toCoord.getSphPos()
toParallax = toCoord.getParallax()
atPole, toPM1, toPM2 = toCoord.getPM()
toRadVel = toCoord.getRadVel()
if toCoord.atInfinity(): # emulate something the TCC does that I don't think my code can do
toRadVel = fromRadVel
predList = (toParallax, toPM1, toPM2, toRadVel)
refList = (refToParallax, refToPM1, refToPM2, refToRadVel)
refToCoord = coordConv.Coord(refToPos1, refToPos2, refToParallax, refToPM1, refToPM2, refToRadVel)
try:
self.assertEqual(toCoord.atPole(), refAtPole)
self.assertEqual(toCoord.atInfinity(), refAtInf)
if (fromSysCode > 0) and (toSysCode > 0):
atol = 1e-7
elif (fromSysCode < -1) and (toSysCode < -1):
atol = 1e-7
else:
# the sla_Mappa in the old TCC is giving slightly different answers
# thatn the latest slaMappa and that appears to explain a small discrepancy
# when converting to/from apparent geocentric coordinates;
# the error is most noticeable for the precession/nutation matrix.
atol = 1e-3
self.assertLess(toCoord.angularSeparation(refToCoord), atol)
self.assertLess(toPVTCoord.getCoord(tai).angularSeparation(refToCoord), atol)
maxPxDelta = refToParallax * 1000.0
self.assertAlmostEqual(toParallax, refToParallax, delta = maxPxDelta)
self.assertTrue(numpy.allclose(predList[1:], refList[1:], atol=atol))
self.assertAlmostEqual(refToDir, coordConv.wrapNear(toDir, refToDir), places=2)
self.assertAlmostEqual(refToDir, coordConv.wrapNear(toPVTDir.getPos(tai), refToDir), places=2)
# scale change bears very little resemblance between old and new.
# I believe this is a bug in the old TCC, since mean->mean should be 1.0
# and the new code is significantly closer to 1.0 than the old code.
# self.assertAlmostEqual(refScaleChange, scaleChange, places=5)
self.assertAlmostEqual(scaleChange, scaleChange2, places=5)
if (fromSysCode > 0) and (toSysCode > 0):
self.assertAlmostEqual(scaleChange, 1.0, places=5)
if toCoordSys.getDateType() == coordConv.DateType_TAI:
# "to" system uses tai as its time; try various strategies that remove proper motion to the given tai date
# test the removePM function (which removes proper motion and radial velocity, but not parallax)
zpmFromCoord = fromCoordSys.removePM(fromCoord, tai)
if fromCoordSys.getName() != "fk4":
# FK4 coordinates have fictitious space motion
zpmFromAtPole, zpmFromPM1, zpmFromPM2 = zpmFromCoord.getPM()
self.assertEqual(fromCoord.atPole(), zpmFromAtPole)
self.assertEqual(zpmFromPM1, 0)
self.assertEqual(zpmFromPM2, 0)
zpmFromRadVel = zpmFromCoord.getRadVel()
self.assertEqual(zpmFromRadVel, 0)
# zpmFromAtPole, zpmFromPM1, zpmFromPM2 = zpmFromCoord.getPM()
# self.assertEqual(fromCoord.atPole(), zpmFromAtPole)
# zpmFromRadVel = zpmFromCoord.getRadVel()
# self.assertEqual(zpmFromPM1, 0)
# self.assertEqual(zpmFromPM2, 0)
# self.assertEqual(zpmFromRadVel, 0)
zpmToCoord, zpmToDir, zpmScaleChange = toCoordSys.convertFrom(fromCoordSys, zpmFromCoord, fromDir, site)
zpmToAtPole, zpmToPos1, zpmToPos2 = zpmToCoord.getSphPos()
self.assertEqual(atPole, zpmToAtPole)
zpmToAtPole, zpmToPM1, zpmToPM2 = zpmToCoord.getPM()
self.assertEqual(atPole, zpmToAtPole)
zpmToRadVel = zpmToCoord.getRadVel()
self.assertAlmostEqual(toDir, zpmToDir, places=2) # why so poor?
self.assertAlmostEqual(scaleChange, zpmScaleChange, places=6)
self.assertLess(toCoord.angularSeparation(zpmToCoord), 1e-7)
self.assertEqual(zpmToPM1, 0)
self.assertEqual(zpmToPM2, 0)
self.assertEqual(zpmToRadVel, 0)
except Exception as e:
if ContinueOnError:
print
print str(e)
print "Failed on line %s: %s" % (lineInd + 1, line)
print "fromCoordSys=(%s, %s); toCoordSys=(%s, %s)" % (fromCoordSys.getName(), fromCoordSys.getDate(), toCoordSys.getName(), toCoordSys.getDate())
print "toSphPos= ", toPos1, toPos2
print "refToSphPos=", refToPos1, refToPos2
print "angular sep=", toCoord.angularSeparation(refToCoord) * 3600.0, "arcsec"
print "pred parallax, PM and radVel=", predList
print "ref parallax, PM and radVel=", refList
print "from parallax, PM and radVel=", (fromParallax, fromPM1, fromPM2, fromRadVel)
print "from vec pos, vel=", fromCoord.getVecPos(), fromCoord.getVecPM()
print "to vec pos, vel=", toCoord.getVecPos(), toCoord.getVecPM()
if not ContinueOnError:
raise
numErrors += 1
duration = time.time() - startTime
print "Tested %d conversions in %0.2f seconds: %0.0f conversions/second" % \
(nTested, duration, nTested/duration)
self.assertEqual(numErrors, 0, "%s errors" % (numErrors,))
def testFile(self):
"""Test file of coordinate conversions from TCC (data/masscc_out.dat)
Known issues:
- radVel does not match; the TCC seems to zero radVel if at infinity, but why?
Also, the TCC seems to be able to round trip RadVel even if at infinity, but how,
if it zeros it when at infinity? Once I resolve this, update the testCoord.py
accordingly, as well as this code.
- Other problems await at other coordinate systems.
"""
site = None
numErrors = 0
with file(DataFile, "rU") as f:
gotSiteData = False
startTime = time.time()
nTested = 0
for lineInd, line in enumerate(f):
line = line.strip()
if not line or line.startswith("#"):
continue
if not gotSiteData:
meanLat, meanLong, elevation, ut1_tai, poleX, poleY = [
float(val) for val in line.split()
]
site = coordConv.Site(meanLong, meanLat, elevation)
site.setPoleWander(poleX, poleY)
site.ut1_tai = ut1_tai
gotSiteData = True
continue
dataList = line.split()
fromSysCode, fromDate, fromPos1, fromPos2, fromPM1, fromPM2, fromParallax, fromRadVel, fromDir, refCoA, refCoB, \
toSysCode, toDate, refToPos1, refToPos2, refToPM1, refToPM2, refToParallax, refToRadVel, \
refToDir, refScaleChange, refAtInf, refAtPole, isOK, tai, last \
= [cnvFunc(val) for val, cnvFunc in itertools.izip(dataList, CnvList)]
if not isOK:
print "Skipping line %s: %s; isOK false" % (lineInd + 1,
line)
if (fromSysCode == 1) and (fromRadVel != 0) and (
fromPM1 == 0) and (fromPM2 == 0):
print "Skipping line %s; FK4 with zero PM and nonzero radVel" % (
lineInd + 1, )
continue
nTested += 1
fromCoord = coordConv.Coord(fromPos1, fromPos2, fromParallax,
fromPM1, fromPM2, fromRadVel)
fromPVTCoord = coordConv.PVTCoord(fromCoord, fromCoord, tai,
0.01)
fromPVTDir = coordConv.PVT(fromDir, 0, tai)
fromCoordSys = getCoordSys(fromSysCode, fromDate, tai)
toCoordSys = getCoordSys(toSysCode, toDate, tai)
site.refCoA = refCoA
site.refCoB = refCoB
try:
toCoord, toDir, scaleChange = toCoordSys.convertFrom(
fromCoordSys, fromCoord, fromDir, site)
toPVTDir = coordConv.PVT()
toPVTCoord, scaleChange2 = toCoordSys.convertFrom(
toPVTDir, fromCoordSys, fromPVTCoord, fromPVTDir, site)
except Exception:
print "Failed on line %s: %s\n" % (lineInd + 1, line)
raise
atPole, toPos1, toPos2 = toCoord.getSphPos()
toParallax = toCoord.getParallax()
atPole, toPM1, toPM2 = toCoord.getPM()
toRadVel = toCoord.getRadVel()
if toCoord.atInfinity(
): # emulate something the TCC does that I don't think my code can do
toRadVel = fromRadVel
predList = (toParallax, toPM1, toPM2, toRadVel)
refList = (refToParallax, refToPM1, refToPM2, refToRadVel)
refToCoord = coordConv.Coord(refToPos1, refToPos2,
refToParallax, refToPM1, refToPM2,
refToRadVel)
try:
self.assertEqual(toCoord.atPole(), refAtPole)
self.assertEqual(toCoord.atInfinity(), refAtInf)
if (fromSysCode > 0) and (toSysCode > 0):
atol = 1e-7
elif (fromSysCode < -1) and (toSysCode < -1):
atol = 1e-7
else:
# the sla_Mappa in the old TCC is giving slightly different answers
# thatn the latest slaMappa and that appears to explain a small discrepancy
# when converting to/from apparent geocentric coordinates;
# the error is most noticeable for the precession/nutation matrix.
atol = 1e-3
self.assertLess(toCoord.angularSeparation(refToCoord),
atol)
self.assertLess(
toPVTCoord.getCoord(tai).angularSeparation(refToCoord),
atol)
maxPxDelta = refToParallax * 1000.0
self.assertAlmostEqual(toParallax,
refToParallax,
delta=maxPxDelta)
self.assertTrue(
numpy.allclose(predList[1:], refList[1:], atol=atol))
self.assertAlmostEqual(refToDir,
coordConv.wrapNear(toDir, refToDir),
places=2)
self.assertAlmostEqual(refToDir,
coordConv.wrapNear(
toPVTDir.getPos(tai), refToDir),
places=2)
# scale change bears very little resemblance between old and new.
# I believe this is a bug in the old TCC, since mean->mean should be 1.0
# and the new code is significantly closer to 1.0 than the old code.
# self.assertAlmostEqual(refScaleChange, scaleChange, places=5)
self.assertAlmostEqual(scaleChange, scaleChange2, places=5)
if (fromSysCode > 0) and (toSysCode > 0):
self.assertAlmostEqual(scaleChange, 1.0, places=5)
if toCoordSys.getDateType() == coordConv.DateType_TAI:
# "to" system uses tai as its time; try various strategies that remove proper motion to the given tai date
# test the removePM function (which removes proper motion and radial velocity, but not parallax)
zpmFromCoord = fromCoordSys.removePM(fromCoord, tai)
if fromCoordSys.getName() != "fk4":
# FK4 coordinates have fictitious space motion
zpmFromAtPole, zpmFromPM1, zpmFromPM2 = zpmFromCoord.getPM(
)
self.assertEqual(fromCoord.atPole(), zpmFromAtPole)
self.assertEqual(zpmFromPM1, 0)
self.assertEqual(zpmFromPM2, 0)
zpmFromRadVel = zpmFromCoord.getRadVel()
self.assertEqual(zpmFromRadVel, 0)
# zpmFromAtPole, zpmFromPM1, zpmFromPM2 = zpmFromCoord.getPM()
# self.assertEqual(fromCoord.atPole(), zpmFromAtPole)
# zpmFromRadVel = zpmFromCoord.getRadVel()
# self.assertEqual(zpmFromPM1, 0)
# self.assertEqual(zpmFromPM2, 0)
# self.assertEqual(zpmFromRadVel, 0)
zpmToCoord, zpmToDir, zpmScaleChange = toCoordSys.convertFrom(
fromCoordSys, zpmFromCoord, fromDir, site)
zpmToAtPole, zpmToPos1, zpmToPos2 = zpmToCoord.getSphPos(
)
self.assertEqual(atPole, zpmToAtPole)
zpmToAtPole, zpmToPM1, zpmToPM2 = zpmToCoord.getPM()
self.assertEqual(atPole, zpmToAtPole)
zpmToRadVel = zpmToCoord.getRadVel()
self.assertAlmostEqual(toDir, zpmToDir,
places=2) # why so poor?
self.assertAlmostEqual(scaleChange,
zpmScaleChange,
places=6)
self.assertLess(toCoord.angularSeparation(zpmToCoord),
1e-7)
self.assertEqual(zpmToPM1, 0)
self.assertEqual(zpmToPM2, 0)
self.assertEqual(zpmToRadVel, 0)
except Exception as e:
if ContinueOnError:
print
print str(e)
print "Failed on line %s: %s" % (lineInd + 1, line)
print "fromCoordSys=(%s, %s); toCoordSys=(%s, %s)" % (
fromCoordSys.getName(), fromCoordSys.getDate(),
toCoordSys.getName(), toCoordSys.getDate())
print "toSphPos= ", toPos1, toPos2
print "refToSphPos=", refToPos1, refToPos2
print "angular sep=", toCoord.angularSeparation(
refToCoord) * 3600.0, "arcsec"
print "pred parallax, PM and radVel=", predList
print "ref parallax, PM and radVel=", refList
print "from parallax, PM and radVel=", (fromParallax,
fromPM1, fromPM2,
fromRadVel)
print "from vec pos, vel=", fromCoord.getVecPos(
), fromCoord.getVecPM()
print "to vec pos, vel=", toCoord.getVecPos(
), toCoord.getVecPM()
if not ContinueOnError:
raise
numErrors += 1
duration = time.time() - startTime
print "Tested %d conversions in %0.2f seconds: %0.0f conversions/second" % \
(nTested, duration, nTested/duration)
self.assertEqual(numErrors, 0, "%s errors" % (numErrors, ))
