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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/photoObj/frames Corrected frame files 15.37 TB 15.37 TB
boss/photo/data Raw imaging data 11.57 TB 26.94 TB
boss/photo/redux Photometric reductions 10.27 TB 37.21 TB
sdss/spectro/redux 2d & 1d SDSS spectro reductions 5.56 TB 42.77 TB
boss/spectro/redux 2d & 1d BOSS spectro reductions 4.20 TB 46.96 TB
boss/photoObj/301 Complete photometric catalog 3.40 TB 50.37 TB
boss/target BOSS targeting files 2.33 TB 52.69 TB
boss/spectro/data Raw BOSS spectroscopy files 1.65 TB 54.34 TB
sdss/spectro/data Raw SDSS spectroscopy files 1.34 TB 55.68 TB
boss/photoObj/external Matches to other catalogs 629.88 GB 56.29 TB
sdss/sspp SSPP files 432.70 GB 56.72 TB
boss/sweeps/dr9 Photometric sweep catalog 367.49 GB 57.07 TB
sdss/segue2/targetAll SEGUE-2 targeting on all data 351.82 GB 57.42 TB
boss/resolve/2010-05-23 Photo resolve files 225.67 GB 57.64 TB
boss/photoObj/atlasOutline Files describing image masks 133.21 GB 57.77 TB
boss/photoObj/astromqa QA files for astrometry 93.21 GB 57.86 TB
sdss/segue1/target SEGUE-1 targeting files 88.91 GB 57.95 TB
sdss/segue2/target SEGUE-2 target files 65.21 GB 58.01 TB
boss/photoObj/xdqso XDQSO catalog 39.21 GB 58.05 TB
boss/photoObj/photoz-weight Photometric redshift distributions 12.91 GB 58.06 TB
sdss/spectro/plates Matches to photometry 11.55 GB 58.07 TB
sdss/tiling Legacy tiling files 11.31 GB 58.08 TB
boss/photoObj/plates Matches to photometry 10.08 GB 58.09 TB
sdss/target Legacy targeting files 9.37 GB 58.10 TB
boss/lya Ly-α forest sample 7.01 GB 58.11 TB
boss/lss Large Scale Structure Catalog Files 2.16 GB 58.11 TB
boss/calib/dr8_final Photometric calibration files 1.00 GB 58.11 TB
boss/qso QSO catalog 191.37 MB 58.11 TB