Fix error in calculation of zenith distance

lsst · Jun 4, 2021 · c208d87 · c208d87
1 parent 0deb56d
commit c208d87
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Showing 3 changed files with 3 additions and 3 deletions.
diff --git a/python/lsst/pipe/tasks/computeExposureSummaryStats.py b/python/lsst/pipe/tasks/computeExposureSummaryStats.py
@@ -154,7 +154,7 @@ def run(self, exposure, sources, background):
                 warnings.simplefilter('ignore')
                 altaz = coord.transform_to(AltAz)
 
-            zenithDistance = altaz.alt.degree
+            zenithDistance = 90.0 - altaz.alt.degree
         else:
             zenithDistance = np.nan
 

diff --git a/tests/test_computeExposureSummaryStats.py b/tests/test_computeExposureSummaryStats.py
@@ -119,7 +119,7 @@ def testComputeExposureSummary(self):
 
         self.assertFloatsAlmostEqual(summary.meanVar, skySigma**2.)
 
-        self.assertFloatsAlmostEqual(summary.zenithDistance, 59.42888, atol=1e-5)
+        self.assertFloatsAlmostEqual(summary.zenithDistance, 30.57112, atol=1e-5)
 
 
 class MyMemoryTestCase(lsst.utils.tests.MemoryTestCase):

diff --git a/tests/test_processCcd.py b/tests/test_processCcd.py
@@ -162,7 +162,7 @@ def testProcessCcd(self):
                         ("summary_psfArea", summary.psfArea, 38.63468352371086),
                         ("summary_ra", summary.ra, 78.85551507080474),
                         ("summary_decl", summary.decl, -9.800258687592303),
-                        ("summary_zenithDistance", float('%.6f' % (summary.zenithDistance)), 47.638999),
+                        ("summary_zenithDistance", float('%.6f' % (summary.zenithDistance)), 42.361001),
                         ("summary_zeroPoint", summary.zeroPoint, 30.940228147639207),
                         ("summary_skyBg", summary.skyBg, 191.4352211728692),
                         ("summary_skyNoise", summary.skyNoise, 12.512330367008024),