hcards_wcs

This OTW script reads WCS-related parameters and creates an ASCII version of the corresponding WCS FITS header cards. Tow versions are generated:

The classical CDELT,CROTA convention
The CD matrix convention


% hcards_wcs.sh --help 

Usage: hcards_wcs.sh 12:00:00.00 +32:30:00.0 100.0 100.0 N 1.000 +30.0 25.0  
arg1 - RAo (J2000) in sexigecimal format
arg2 - DECo (J2000) in sexigecimal format
arg3 - X position in pixels of RAo 
arg4 - Y position in pixels of DECo 
arg5 - mirror flip (yes=Y, No=N) 
arg6 - plate scale in arcsec per pixel  
arg7 - position angle (deg) of Y-axis to North 
arg8 - estimated combined RAo,DECo error in arcsec 

hcards_wcs.sh:
  Read basic WCS-related image parameters and write the standard WCS header cards. 
Two sets of header cards are made: 
  1) CDELT convention 
  2) CD_ rotation+scale matrix convention

In Aug2017 I added a second type of wcs header type in hcards_wcs.sh. It uses the CD_ matrix formalism. Although not very intuitive, it seems to be used frequently (e.g. for the HET acm headers).

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