diff options
Diffstat (limited to 'lib/stwcs/updatewcs')
| -rw-r--r-- | lib/stwcs/updatewcs/corrections.py | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/stwcs/updatewcs/corrections.py b/lib/stwcs/updatewcs/corrections.py index 6dc2ecd..f9e0b38 100644 --- a/lib/stwcs/updatewcs/corrections.py +++ b/lib/stwcs/updatewcs/corrections.py @@ -104,8 +104,11 @@ class TDDCorr(object): skew_coeffs = hwcs.idcmodel.refpix['skew_coeffs'] cy_beta = skew_coeffs['TDD_CY_BETA'] - - hwcs.idcmodel.cy[1,1] += cy_beta*(rday - skew_coeffs['TDD_DATE']) + cy_alpha = skew_coeffs['TDD_CY_ALPHA'] + if cy_alpha is None: + hwcs.idcmodel.cy[1,1] += cy_beta*(rday - skew_coeffs['TDD_DATE']) + else: + hwcs.idcmodel.cy[1,1] = cy_alpha + cy_beta*(rday - skew_coeffs['TDD_DATE']) apply_tdd2idc2 = classmethod(apply_tdd2idc2) |