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U/danielsf/fix iers interp #91

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U/danielsf/fix iers interp #91

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d6e0f21
update hour angle test to use date in the past
danielsf Oct 29, 2019
1b4899f
just do not even try to download the IERS tables
danielsf Oct 29, 2019
a47f702
actually pick appropriate MJD for test
danielsf Oct 29, 2019
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14 changes: 7 additions & 7 deletions tests/testGalSimInterface.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,9 +36,9 @@
import lsst.afw.image as afwImage
from lsst.sims.coordUtils import clean_up_lsst_camera

# Tell astropy not to download this file again, even if it's out of date.
# Tell astropy not to download the IERS tables
from astropy.utils import iers
iers.conf.auto_max_age = None
iers.conf.auto_download=False

ROOT = os.path.abspath(os.path.dirname(__file__))

Expand Down Expand Up @@ -1253,20 +1253,20 @@ def test_hour_angle(self):
BandpassDict.loadTotalBandpassesFromFiles(),
None, apply_sensor_model=False)

mjd = 59877.15107861111027887
mjd = 57780.0 # pick an MJD that does not require interpolation
ra = 55.52107440528638449
self.assertAlmostEqual(math.cos(math.radians(321.62974517903774)),
self.assertAlmostEqual(math.cos(math.radians(0.19508880821259567)),
math.cos(math.radians(gs_interpreter.getHourAngle(mjd, ra))),
places=4)

self.assertAlmostEqual(math.sin(math.radians(321.62974517903774)),
self.assertAlmostEqual(math.sin(math.radians(0.19508880821259567)),
math.sin(math.radians(gs_interpreter.getHourAngle(mjd, ra))),
places=4)

# Pick a MJD such that GAST = -observatory geodetic longitude,
# so that local hour angle = 360 - ra.
mjd = 58265.3194197049 - gs_interpreter.observatory.getLongitude().asDegrees()/360.
self.assertAlmostEqual(-ra, gs_interpreter.getHourAngle(mjd, ra),
mjd = 57779.84565546585
self.assertAlmostEqual(360.0-ra, gs_interpreter.getHourAngle(mjd, ra),
places=4)


Expand Down