Directory key:
     2/                            Zodiacal Background Observation
     6/                            Extragalactic Observation
     7/                            Extremely deep extragalactic observations embedded in shallow fields
File name key:
     mosaic.fits                   Mosaic image
     unc.fits                      Uncertainty map
     cov.fits                      Coverage map
     std.fits                      Standard deviation map
     median_mosaic.fits            Median mosaic image
     median_mosaic_unc.fits        Median uncertainty map
     uf_mosaic.fits                Unfiltered mosaic image
     uf_unc.fits                   Unfiltered uncertainty map
     uf_cov.fits                   Unfiltered coverage map
     uf_std.fits                   Unfiltered standard deviation map
     uf_median_mosaic.fits         Unfiltered median mosaic image
     uf_median_mosaic_unc.fits     Unfiltered median uncertainty map