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Data Volume Table

The table below lists the sizes of the various data products in DR9. Note that the total data volume is almost 60 TB. A substantial fraction (~50%) of this is raw or intermediate data that is primarily of interest to experts. If your institution requires most or all of this data you may email us at the helpdesk to contact a data transfer expert.

The Data Volume of Data Release 9
Directory Description Size Running Total
boss/calib/dr8_final Photometric calibration files 1.00 GB 1.00 GB
boss/lss Large Scale Structure Catalog Files 2.16 GB 3.16 GB
boss/lya Ly-α forest sample 7.01 GB 10.17 GB
boss/photo/data Raw imaging data 11.57 TB 11.58 TB
boss/photo/redux Photometric reductions 10.27 TB 21.85 TB
boss/photoObj/301 Complete photometric catalog 3.40 TB 25.25 TB
boss/photoObj/astromqa QA files for astrometry 93.21 GB 25.34 TB
boss/photoObj/atlasOutline Files describing image masks 133.21 GB 25.47 TB
boss/photoObj/external Matches to other catalogs 629.88 GB 26.09 TB
boss/photoObj/frames Corrected frame files 15.37 TB 41.46 TB
boss/photoObj/photoz-weight Photometric redshift distributions 12.91 GB 41.47 TB
boss/photoObj/plates Matches to photometry 10.08 GB 41.48 TB
boss/photoObj/xdqso XDQSO catalog 39.21 GB 41.52 TB
boss/qso QSO catalog 191.37 MB 41.52 TB
boss/resolve/2010-05-23 Photo resolve files 225.67 GB 41.74 TB
boss/spectro/data Raw BOSS spectroscopy files 1.65 TB 43.39 TB
boss/spectro/redux 2d & 1d BOSS spectro reductions 4.20 TB 47.59 TB
boss/sweeps/dr9 Photometric sweep catalog 367.49 GB 47.95 TB
boss/target BOSS targeting files 2.33 TB 50.27 TB
sdss/segue1/target SEGUE-1 targeting files 88.91 GB 50.36 TB
sdss/segue2/target SEGUE-2 target files 65.21 GB 50.42 TB
sdss/segue2/targetAll SEGUE-2 targeting on all data 351.82 GB 50.77 TB
sdss/spectro/data Raw SDSS spectroscopy files 1.34 TB 52.10 TB
sdss/spectro/plates Matches to photometry 11.55 GB 52.11 TB
sdss/spectro/redux 2d & 1d SDSS spectro reductions 5.56 TB 57.67 TB
sdss/sspp SSPP files 432.70 GB 58.09 TB
sdss/target Legacy targeting files 9.37 GB 58.10 TB
sdss/tiling Legacy tiling files 11.31 GB 58.11 TB