Merge pull request #205 from lsst/tickets/DM-32549

DM-32549: Supply position to psf.computeShape() calls
lsst · Dec 8, 2021 · 5706f01 · 5706f01
2 parents 5f749c9 + cb5ef32
commit 5706f01
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/python/lsst/ip/diffim/modelPsfMatch.py b/python/lsst/ip/diffim/modelPsfMatch.py
@@ -336,8 +336,10 @@ def run(self, exposure, referencePsfModel, kernelSum=1.0):
         result = self._buildCellSet(exposure, referencePsfModel)
         kernelCellSet = result.kernelCellSet
         referencePsfModel = result.referencePsfModel
-        fwhmScience = exposure.getPsf().computeShape().getDeterminantRadius()*sigma2fwhm
-        fwhmModel = referencePsfModel.computeShape().getDeterminantRadius()*sigma2fwhm
+        sciAvgPos = exposure.getPsf().getAveragePosition()
+        modelAvgPos = referencePsfModel.getAveragePosition()
+        fwhmScience = exposure.getPsf().computeShape(sciAvgPos).getDeterminantRadius()*sigma2fwhm
+        fwhmModel = referencePsfModel.computeShape(modelAvgPos).getDeterminantRadius()*sigma2fwhm
 
         basisList = makeKernelBasisList(self.kConfig, fwhmScience, fwhmModel, metadata=self.metadata)
         spatialSolution, psfMatchingKernel, backgroundModel = self._solve(kernelCellSet, basisList)