Barycentric X component of the JWST velocity vector, in km/s, at the mid-point of the exposure.
Attribute | Value |
---|---|
data type | float |
enumerated Values | not defined |
units | km/s |
example | 42.0 |
default value | |
special processing | VALUE_REQUIRED |
source | Science Data Processing (SDP) |
software source | |
calculation | jwst_dx 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_dx', 'GuideStarExt.jwst_dx'] |
data type in DB | float |
instrument | ALL |
mode | All |
product level | 1b |
FITS hdu | SCI |
FITS header section | Ephemeris |