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