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functions in fits.i - F


             FitsHeader - a Yorick structure  defined to store (part of) FITS  
     header information.  The structure has the following members:  
     bitpix   - bits-per-pixel:  8  pixel values are unsigned bytes  
                                16  pixel values are signed 2-byte integers  
                                32  pixel values are signed 4-byte integers  
                               -32  pixel values are 4-byte floating points  
                               -64  pixel values are 8-byte floating points  
     naxis    - number of axis  
     axis(k)  - number of pixel along k-th axis  
     bscale   - pixelValue = BZERO+BSCALE*fileValue  
     bzero    - pixelValue = BZERO+BSCALE*fileValue  
     bunit    - brightness unit  
     datamax  - maximum data value in the file  
     datamin  - minimum data value in the file  
     object   - image name  
     date     - date of file creation (dd/mm/yy)  
     date_obs - date of data acquisition (dd/mm/yy)  
     origin   - institution  
     instrume - data acquisition instrument  
     telescop - data acquisition telescope  
     observer - observer name/identification  
     history  - newline separated history lines  
     comment  - newline separated comment lines  
     epoch    - epoch of coordinate system (year)  
     crval(k) - coord = CRVAL+(pixel-CRPIX)*CDELT  
     crpix(k) - coord = CRVAL+(pixel-CRPIX)*CDELT  
     cdelt(k) - coord = CRVAL+(pixel-CRPIX)*CDELT  
     ctype(k) - type of physical coordinate  
     crota(k) - rotation angle of axis No. #  
keyword,  defined at i/fits.i   line 2982  
SEE ALSO: fits,   fitsMakeOldHeader