Add check for NaN PSF sigma

lsst · Nov 27, 2024 · b66c389 · b66c389
1 parent 1a0ca8c
commit b66c389
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/python/lsst/meas/algorithms/installGaussianPsf.py b/python/lsst/meas/algorithms/installGaussianPsf.py
@@ -76,6 +76,9 @@ def run(self, exposure):
         if exposure.hasPsf():
             psfModel = exposure.getPsf()
             psfSigma = psfModel.computeShape(psfModel.getAveragePosition()).getDeterminantRadius()
+            if math.isnan(psfSigma):
+                raise RuntimeError("Cannot create a Gaussian PSF model. "
+                                   "The computed exposure psfSigma is NaN!")
             width, height = psfModel.computeImage(psfModel.getAveragePosition()).getDimensions()
         else:
             psfSigma = self.config.fwhm / FwhmPerSigma