NIRCam or NIRISS dither pattern size that indicates the dither point distribution for the INTRASCA pattern type. It is included when an FGS External Calibration dither is in parallel with either NIRCam Engineering Imaging (and PATTTYPE=INTRASCA) or NIRISS External Calibration. Possible values are NONE, SMALL, MEDIUM, LARGE.
| Attribute | Value |
|---|---|
| data type | string |
| enumerated Values | ['SMALL', 'MEDIUM', 'LARGE', 'NONE'] |
| units | |
| example | SMALL |
| default value | |
| special processing | OPTIONAL |
| source | Proposal and Planning System (PPS) |
| software source | |
| calculation | |
| DB destination | ['ScienceCommon.pattsize'] |
| data type in DB | nvarchar(10) |
| instrument | NIRCAM |
| mode | ['NRC_IMAGE', 'NRC_FLAT'] |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Dither |