UTC exposure start time as calcualted from values reported in the engineering data stream (format YYYY-MM-DDThh:mm:ss.sss).
| Attribute | Value |
|---|---|
| data type | string |
| enumerated Values | not defined |
| units | |
| example | 2015-01-01T12:01:01.001 |
| default value | |
| special processing | OPTIONAL |
| source | Engineering Service |
| software source | |
| calculation | Calculated from instrument-specific engineering values. For MIRI, (most-significant bytes, least-signifcant bytes) based on DETECTOR: (IMIR_IC_EXP_START_MSB, IMIR_IC_EXP_START_LSB) for MIRIMAGE; (IMIR_LW_EXP_START_MSB, IMIR_LW_EXP_START_LSB) for MIRIFULONG; (IMIR_SW_EXP_START_MSB, IMIR_SW_EXP_START_LSB) for MIRIFUSHORT. |
| DB destination | ['ScienceCommon.expsteng'] |
| data type in DB | datetime2 |
| instrument | Multiple |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Exposure |