The value field shall contain an integer that specifies the number of bits that represent a data value in the associated data array. BITPIX = 0 for the primary header. For an image extension, 16 is uncalibrated and -32 is calibrated. For group information captured in an ASCII table extension BITPIX = 8, denoting that the array contains ASCII characters.
| Attribute | Value |
|---|---|
| data type | integer |
| enumerated Values | not defined |
| units | |
| example | 0 |
| default value | 0 |
| special processing | not defined |
| source | Science Data Processing (SDP) |
| software source | calculation |
| calculation | |
| DB destination | not defined |
| data type in DB | smallint |
| instrument | Multiple |
| mode | All |
| product level | 1a |
| FITS hdu | PRIMARY |
| FITS header section | Basic |