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| author | hack <hack@stsci.edu> | 2011-02-21 16:54:45 -0500 |
|---|---|---|
| committer | hack <hack@stsci.edu> | 2011-02-21 16:54:45 -0500 |
| commit | b8f9a0e94827955eb44f96166d2c75ab71a47054 (patch) | |
| tree | df37863605c5a86aa6ac14f12b4e7d304ab7e777 /wcsutil/mappings.py | |
| parent | c41b232483ee6e89d62591720cfb6764213aa44e (diff) | |
| download | stwcs_hcf-b8f9a0e94827955eb44f96166d2c75ab71a47054.tar.gz | |
The HSTWCS class of STWCS has been updated with a new method: all_sky2pix(). This new method implements an iterative solution using the full distortion model to convert sky positions into pixel positions. The algorithm used was based on the code from drizzle's task 'tranback'. This method has been checked using WFC/IR image with SIP and ACS/HRC image with SIP+NPOLFILE such that the RA/Dec positions for a few random positions can be returned to within a delta close to the error limit (<<0.001 pixels). This also addresses Ticket #673.
git-svn-id: http://svn.stsci.edu/svn/ssb/stsci_python/stsci_python/trunk/stwcs@12003 fe389314-cf27-0410-b35b-8c050e845b92
Diffstat (limited to 'wcsutil/mappings.py')
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