Location of the reference point in the image for axis 1, indexed from 1 (not 0). Note that the reference point may lie outside the image.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | |
| example | 1024 |
| default value | 0.0 |
| special processing | not defined |
| source | Science and Operations Center Project Reference Database (PRD) |
| software source | PRD:Aperture.XSciRef |
| calculation | |
| DB destination | ['ScienceCommonExt.crpix1', 'GuideStarExt.crpix1'] |
| data type in DB | float |
| instrument | Multiple |
| mode | All |
| product level | 1p |
| FITS hdu | SCI |
| FITS header section | WCS Parameters |