Known and Unknown parameters

Some parameter values in the header are the same for all images, and some of them don't matter for the analysis of the AAFDCC. So, these values will be added to the header of the converted fits files:

OBJECT='SUN'
TYPE-OBS='FULLDISK'
SEEING=0                  / I don't think this matters for the analysis
CDELT1=1.05440       / This quantity is the same for all images
CDELT2=1.05440       /
CTYPE1='ARCSEC'
CTYPE2='ARCSEC'
CRVAL1=0                / I don't really know what this means, but it is always 0
CRVAL2=0
ORIGIN='BBSO'
TELESCOPE='SINGER'
WAVELNTH='HALPHA'
OBSERVER='X'
EXPTIME=0.04000   / Observing times vary from 0.025 to 0.05 seconds, but it probably doesn't matter for AAFDCC. Even if it does, there is no way to derive the exposure time.
TEC_TEMP=0          / There is no way to extract this from the images
ASP=1.00000           / Raw image aspect ratio


The remaining parameters listed below can be extracted from the converted images:

# By analysis of the solar disk, detecting its center and radius:
CRPIX1=      / Central pixel in X
CRPIX2=      / Central pixel in Y
CENX=              / Raw image disk center X
CENY=              / Raw image disk center Y
WIDT=               / Width of the disk (pixels)  
MAXC=              / Quiet Sun Max Brightness (probably won't be able to extract this)

# From the filename:
TIME-OBS='hh:mm:ss'  / From the filename
DATE-OBS='yyy-mm-dd'  / From filename
DATE_OBS='yyy-mm-ddThh:mm:ss.000Z' /


Now, the job is to actually extract these parameters and write them in the filename headers.