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-rw-r--r--hstwcs/dgeo.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/hstwcs/dgeo.py b/hstwcs/dgeo.py
index 70e6a98..4ab9079 100644
--- a/hstwcs/dgeo.py
+++ b/hstwcs/dgeo.py
@@ -149,7 +149,7 @@ class DGEOCorr(object):
"""
coeffs = cls.getCoeffs(header)
idcscale = header['IDCSCALE']
- sclcoeffs = numpy.linalg.inv(coeffs)/idcscale
+ sclcoeffs = numpy.linalg.inv(coeffs/idcscale)
ndx, ndy = numpy.dot(sclcoeffs, [dx.ravel(), dy.ravel()])
ndx.shape = dx.shape
ndy.shape=dy.shape