Data Volume Table

The table below lists the sizes of the various data products in DR12.  Note that the total data volume is about 116 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.

There are additional, small value-added catalogs that may not be listed here, due to the timing of their release.

The Data Volume of Data Release 12

Directory Description Size
apo/ecam Engineering Camera data 5.32 GB
apo/gcam Guide Camera data 912 GB
apo/ircam Cloud Camera data 292 GB
apo/mapper Plate Mapper data 45.9 GB
apogee/spectro/data Raw APOGEE spectroscopy files 21.5 TB
apogee/spectro/data1m Raw APOGEE spectroscopy files from the 1-m telescope 961 GB
apogee/spectro/redux APOGEE spectro reductions 10.8 TB
apogee/target APOGEE target files 14.2 GB
boss/calib/dr8_final Photometric calibration files 947 MB
boss/photo/data Raw imaging data 25.5 TB
boss/photo/redux Photometric reductions 10.2 TB
boss/photoObj/301 Complete photometric catalog 3.40 TB
boss/photoObj/astromqa QA files for astrometry 80.8 GB
boss/photoObj/atlasOutline Files describing image masks 82.5 GB
boss/photoObj/external Matches to other catalogs 713 GB
boss/photoObj/frames Corrected frame files 15.4 TB
boss/photoObj/photoz-weight Photometric redshift distributions 12.9 GB
boss/photoObj/plates Matches to photometry 16.1 GB
boss/photoObj/xdqso XDQSO catalog 39.1 GB
boss/resolve/2010-05-23 Photo resolve files 214 GB
boss/qso QSO Catalog Files 1.34 GB
boss/spectro/data Raw BOSS spectroscopy files 3.88 TB
boss/spectro/redux 2d & 1d BOSS spectro reductions 10.7 TB
boss/sweeps/dr9 Photometric sweep catalog 516 GB
boss/target BOSS targeting files 2.33 TB
marvels/spectro/data Raw MARVELS spectroscopy files 766 GB
marvels/spectro/redux MARVELS spectro reductions 41.1 GB
marvels/target MARVELS target files 112 MB
sdss/segue1/target SEGUE-1 targeting files 88.9 GB
sdss/segue2/target SEGUE-2 target files 65.2 GB
sdss/segue2/targetAll SEGUE-2 targeting on all data 352 GB
sdss/spectro/data Raw SDSS spectroscopy files 1.33 TB
sdss/spectro/plates Matches to photometry 11.5 GB
sdss/spectro/redux 2d & 1d SDSS spectro reductions 5.66 TB
sdss/sspp SSPP files 428 GB
sdss/target Legacy targeting files 9.35 GB
sdss/tiling Legacy tiling files 11.1 GB