| Contains information about the systems of field centres used in the SSA. |
| The Schmidt photographic surveys were based around predefined systems of field centres. This table lists the ones employed in the photographic surveys used to generate the SSA. |
| Name | Type | Length | Unit | Description | Default Value | Unified Content Descriptor |
|---|---|---|---|---|---|---|
| systemID | tinyint | 1 | The system of survey fields used for the survey | ID_MAIN | ||
| name | varchar | 32 | The name of the system, eg. "ESO/SRC", "POSS-I" etc. | NOTE | ||
| centrePitch | real | 4 | degrees | The pitch of the field centres | OBS_DIFF | |
| Total length | 37 |