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| author | embray <embray@stsci.edu> | 2011-06-22 19:24:07 -0400 |
|---|---|---|
| committer | embray <embray@stsci.edu> | 2011-06-22 19:24:07 -0400 |
| commit | d93a10017d62f39d80167b45c1044a5e113f5994 (patch) | |
| tree | 07967ea82a8550f8a8423bbe30046e798cf6c98e /lib/stwcs/updatewcs/utils.py | |
| parent | 708b4f32ac133fdb6157ec6e243dc76e32f9a84b (diff) | |
| download | stwcs_hcf-d93a10017d62f39d80167b45c1044a5e113f5994.tar.gz | |
Redoing the r13221-13223 merge in the actual trunk now. This updates trunk to the setup_refactoring branch (however, coords, pysynphot, and pywcs are still being pulled from the astrolib setup_refactoring branch. Will have to do that separately then update the svn:externals)
git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@13225 fe389314-cf27-0410-b35b-8c050e845b92
Diffstat (limited to 'lib/stwcs/updatewcs/utils.py')
| -rw-r--r-- | lib/stwcs/updatewcs/utils.py | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/stwcs/updatewcs/utils.py b/lib/stwcs/updatewcs/utils.py new file mode 100644 index 0000000..29ba5f3 --- /dev/null +++ b/lib/stwcs/updatewcs/utils.py @@ -0,0 +1,28 @@ +from __future__ import division # confidence high + +def diff_angles(a,b): + """ + Perform angle subtraction a-b taking into account + small-angle differences across 360degree line. + """ + + diff = a - b + + if diff > 180.0: + diff -= 360.0 + + if diff < -180.0: + diff += 360.0 + + return diff + +def getBinning(fobj, extver=1): + # Return the binning factor + binned = 1 + if fobj[0].header['INSTRUME'] == 'WFPC2': + mode = fobj[0].header.get('MODE', "") + if mode == 'AREA': binned = 2 + else: + binned = fobj['SCI', extver].header.get('BINAXIS',1) + return binned + |