| B | 
|---|
| Name | Schema Table | Database | Description | Type | Length | Unit | Default Value | Unified Content Descriptor | 
|---|
 | b | [nspid]CurrentAstrometry, [nspid]PreviousAstrometry | WSA NonSurvey | Galactic latitude of device centre | float | 8 | Degrees |  | POS_GAL_LAT | 
 | b | [nspid]Detection, [nspid]Source | WSA NonSurvey | Galactic latitude | float | 8 | Degrees |  | POS_GAL_LAT | 
 | bandMergingCriterion | [nspid]RequiredSynoptic | WSA NonSurvey | maximum timespan over which different filters are merged into sources in the synoptic source table. | real | 4 | minutes | -0.9999995e9 |  | 
 | beamNS | [nspid]Multiframe | WSA NonSurvey | Topend: N-S beam {image primary HDU keyword: NSBEAM} | real | 4 |  | -0.9999995e9 |  | 
 | beamWE | [nspid]Multiframe | WSA NonSurvey | Topend: W-E beam {image primary HDU keyword: WEBEAM} | real | 4 |  | -0.9999995e9 |  | 
 | bitsPerPix | [nspid]MultiframeDetector | WSA NonSurvey | Number of bits per data pixel, eg. +32 = 4 byte integers {image extension keyword: BITPIX} | smallint | 2 | FITS bitpix |  | NUMBER | 
 | bMag | [nspid]FSstars | WSA NonSurvey | B band total magnitude | real | 4 | mag | -0.9999995e9 | PHOT_INT-MAG | 
 | brgMag | [nspid]CurrentStdStarInfo, [nspid]PreviousStdStarInfo | WSA NonSurvey | BrG band total magnitude of star (from external sources if primary) | real | 4 | mag |  | PHOT_INT-MAG | 
 | brgMagErr | [nspid]CurrentStdStarInfo, [nspid]PreviousStdStarInfo | WSA NonSurvey | BrG band magnitude error of star | real | 4 | mag |  | ERROR |