Z spatial coordinate of JWST (km). Science Data Processing code (SDP) reads this from the observatory ephemeris data.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | kilometers |
| example | |
| default value | |
| special processing | VALUE_REQUIRED |
| source | Ephemeris |
| software source | |
| calculation | Value from either DefinitiveEphemeris or PredictedEphemeris tables where useAfter date is closest to the exposure's EXPMID time. |
| DB destination | ['ScienceCommon.jwst_z', 'GuideStar.jwst_z'] |
| data type in DB | float |
| instrument | Multiple |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Exphemeris |