| Contains basic data for a Chunk |
| A Chunk is a unit for SDSS data export. It is a part of an SDSS stripe, a 2.5 degree wide cylindrical segment aligned at a great circle between the survey poles. A Chunk has had both strips completely observed. Since the SDSS camera has gaps between its 6 columns of CCDs, each stripe has to be scanned twice (these are the strips) resulting in 12 slightly overlapping narrow observation segments. Only those parts of a stripe are ready for export where the observation is complete, hence the declaration of a chunk, usually consisting of 2 runs. |
| Index Type | Key or Field List |
| primary key | chunkID |
| foreign key | StripeDefs(stripe) |