The FWCPOS keyword gives the encoder-based position of the NIRISS filter wheel during an exposure.
| Attribute | Value |
|---|---|
| data type | float |
| enumerated Values | not defined |
| units | millimeters |
| example | 315.82822 |
| default value | 0.0 |
| special processing | not defined |
| source | Engineering Service |
| software source | ENGSERVICE:INIS_FWC_POS:EXPSTART:EXPEND |
| calculation | |
| DB destination | ['NirissScience.fwcpos'] |
| data type in DB | float |
| instrument | NIRISS |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Instrument |