Barycentric X spatial coordinate of JWST, in km.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | kilometers |
| example | |
| default value | |
| special processing | VALUE_REQUIRED |
| source | Science Data Processing (SDP) |
| software source | |
| calculation | jwst_x value (geocentric) from either DefEphemeris or PredictEphemeris table where useAfter date is closest to the exposure's EXPMID time, converted into the barycentric frame. |
| DB destination | ['ScienceCommonExt.jwst_x', 'GuideStarExt.jwst_x'] |
| data type in DB | float |
| instrument | ALL |
| mode | All |
| product level | 1b |
| FITS hdu | SCI |
| FITS header section | Ephemeris |