Filter wheel position offset (actual minus commanded)
| Attribute | Value |
|---|---|
| data type | integer |
| enumerated Values | not defined |
| units | DN |
| example | 5 |
| default value | |
| special processing | OPTIONAL |
| source | Science Data Processing (SDP) |
| software source | |
| calculation | achieved position from engineering mnemonic INRC_{A|B}_M_FW_{LW|SW}_AS_POS ('A' or 'B' from MODULE, 'LW' for 'LONG' or 'SW' for 'SHORT' from CHANNEL) minus commanded position from engineering mnemonic INRC_SW_ICECMDn_POSWRD (where n is one of {1, 2, 3, 4} and engineering mnemonic INRC_SW_ICECMDn_MECHID specifies which wheel is assigned to that slot for the exposure's commanded position) |
| DB destination | ['NircamScience.fwposoff'] |
| data type in DB | int |
| instrument | NIRCAM |
| mode | All |
| product level | 1b |
| FITS hdu | PRIMARY |
| FITS header section | Instrument |