the start of guider data within this file (Modified Julian Date)
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | days |
| example | |
| default value | |
| special processing | VALUE_REQUIRED |
| source | calculated |
| software source | |
| calculation | |
| DB destination | ['GuideStar.datastrt'] |
| data type in DB | float |
| instrument | Multiple |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Guide star Information |