Observatory UTC time when the guider function started.
| Attribute | Value |
|---|---|
| data type | string |
| enumerated Values | not defined |
| units | |
| example | 2015-07-29 00:02:45.8540000 |
| default value | |
| special processing | OPTIONAL |
| source | Science Data Processing (SDP) |
| software source | |
| calculation | SDP sets from METRICS_DB:VisitTimeline.startDate |
| DB destination | ['GuideStar.gf_start'] |
| data type in DB | datetime2 |
| instrument | Multiple |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Guide star Information |