The activity identifier is a two character indentifier (base 36), which identifies activity within a sequence. It is included in the observation ID.
| Attribute | Value |
|---|---|
| data type | string |
| enumerated Values | not defined |
| units | |
| example | 01 |
| default value | |
| special processing | VALUE_REQUIRED |
| source | Science Image Header |
| software source | |
| calculation | OBS_ID[25-26] |
| DB destination | ['ScienceCommon.act_id'] |
| data type in DB | nchar(2) |
| instrument | Multiple |
| mode | All |
| product level | 1a |
| FITS hdu | PRIMARY |
| FITS header section | Observation identifiers |