FLATFILE= '/data/gcam/58241/gimg-0003.fits.gz'                                  
FLATFILE= '/data/gcam/58241/gimg-0206.fits.gz'                                  
FLATFILE= '/data/gcam/58241/gimg-0336.fits.gz'                                  
FLATFILE= '/data/gcam/58241/gimg-0470.fits.gz'