FLATFILE= '/data/gcam/58091/gimg-0005.fits.gz'                                  
FLATFILE= '/data/gcam/58091/gimg-0157.fits.gz'                                  
FLATFILE= '/data/gcam/58091/gimg-0279.fits.gz'                                  
FLATFILE= '/data/gcam/58091/gimg-0346.fits.gz'