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.

• Sort the table below by name.
• Sort the table below by size (ascending).
• Sort the table below by size (descending).

The Data Volume of Data Release 9

Directory	Description	Size	Running Total
boss/qso	QSO catalog	191.37 MB	191.37 MB
boss/calib/dr8_final	Photometric calibration files	1.00 GB	1.19 GB
boss/lss	Large Scale Structure Catalog Files	2.16 GB	3.35 GB
boss/lya	Ly-α forest sample	7.01 GB	10.36 GB
sdss/target	Legacy targeting files	9.37 GB	19.73 GB
boss/photoObj/plates	Matches to photometry	10.08 GB	29.81 GB
sdss/tiling	Legacy tiling files	11.31 GB	41.12 GB
sdss/spectro/plates	Matches to photometry	11.55 GB	52.67 GB
boss/photoObj/photoz-weight	Photometric redshift distributions	12.91 GB	65.59 GB
boss/photoObj/xdqso	XDQSO catalog	39.21 GB	104.80 GB
sdss/segue2/target	SEGUE-2 target files	65.21 GB	170.01 GB
sdss/segue1/target	SEGUE-1 targeting files	88.91 GB	258.92 GB
boss/photoObj/astromqa	QA files for astrometry	93.21 GB	352.14 GB
boss/photoObj/atlasOutline	Files describing image masks	133.21 GB	485.35 GB
boss/resolve/2010-05-23	Photo resolve files	225.67 GB	711.02 GB
sdss/segue2/targetAll	SEGUE-2 targeting on all data	351.82 GB	1.04 TB
boss/sweeps/dr9	Photometric sweep catalog	367.49 GB	1.40 TB
sdss/sspp	SSPP files	432.70 GB	1.82 TB
boss/photoObj/external	Matches to other catalogs	629.88 GB	2.43 TB
sdss/spectro/data	Raw SDSS spectroscopy files	1.34 TB	3.77 TB
boss/spectro/data	Raw BOSS spectroscopy files	1.65 TB	5.42 TB
boss/target	BOSS targeting files	2.33 TB	7.75 TB
boss/photoObj/301	Complete photometric catalog	3.40 TB	11.15 TB
boss/spectro/redux	2d & 1d BOSS spectro reductions	4.20 TB	15.35 TB
sdss/spectro/redux	2d & 1d SDSS spectro reductions	5.56 TB	20.90 TB
boss/photo/redux	Photometric reductions	10.27 TB	31.18 TB
boss/photo/data	Raw imaging data	11.57 TB	42.74 TB
boss/photoObj/frames	Corrected frame files	15.37 TB	58.11 TB

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