World Coordinate value at the reference point, axis 3.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | microns |
| example | 0.0 |
| default value | |
| special processing | OPTIONAL |
| source | Calibration Software |
| software source | |
| calculation | |
| DB destination | ['ScienceCommonExt.crval3'] |
| data type in DB | float |
| instrument | Multiple |
| mode | All |
| product level | 2b |
| FITS hdu | SCI |
| FITS header section | WCS Parameters |