N
Name	Schema Table	Database	Description	Type	Length	Unit	Default Value	Unified Content Descriptor
n_blank	twomass_xsc	2MASS	number of blanked source records.	smallint	2			NUMBER
n_ext	twomass_scn	2MASS	Number of regular extended sources detected in scan.	int	4			NUMBER
n_ext	twomass_sixx2_scn	2MASS	number of regular extended sources detected in scan	int	4
n_sub	twomass_xsc	2MASS	number of subtracted source records.	smallint	2			NUMBER
name	FieldSystem	PSSA	The name of the system, eg. "ESO/SRC", "POSS-I" etc.	varchar	32			NOTE
name	FieldSystem	SSA	The name of the system, eg. "ESO/SRC", "POSS-I" etc.	varchar	32			NOTE
nCalCoeffs	Plate	PSSA	No. of photometric calibration coefficients	tinyint	1			FIT_PARAM_VALUE
nCalCoeffs	Plate	SSA	No. of photometric calibration coefficients	tinyint	1			FIT_PARAM_VALUE
ndet	twomass_psc	2MASS	Frame detection statistics.	varchar	6			NUMBER
ndet	twomass_sixx2_psc	2MASS	number of >3-sig. ap. mag measurements, # possible (jjhhkk)	varchar	6
neighbourObjID	Neighbours	SSA	The object ID of the neighbour in SSA.Source	bigint	8			ID_CATALOG
night_key	twomass_xsc	2MASS	key to night data record in "scan DB".	smallint	2			ID_NUMBER
nominalDec	Field	PSSA	Nominal field centre Dec	float	8	degrees		POS_EQ_DEC_MAIN
nominalDec	Field	SSA	Nominal field centre Dec	float	8	degrees		POS_EQ_DEC_MAIN
nominalRA	Field	PSSA	Nominal field centre RA	float	8	degrees		POS_EQ_RA_MAIN
nominalRA	Field	SSA	Nominal field centre RA	float	8	degrees		POS_EQ_RA_MAIN
nopt_mchs	twomass_psc	2MASS	The number of USNO-A2.0 or Tycho 2 optical sources found within a 5" radius of the TWOMASS position.	smallint	2			NUMBER
nParents	Plate	PSSA	No. of parent objects detected on plate	int	4			NUMBER
nParents	Plate	SSA	No. of parent objects detected on plate	int	4			NUMBER
Nplates	Source	PSSA	No. of plates used for this proper motion measurement	tinyint	1			NUMBER
Nplates	Source	SSA	No. of plates used for this proper motion measurement	tinyint	1			NUMBER
nSteps	Plate	PSSA	No. of intensity calibration wedge steps	tinyint	1			INST_PARAM
nSteps	Plate	SSA	No. of intensity calibration wedge steps	tinyint	1			INST_PARAM
numFields	Survey	PSSA	No. of fields in the survey	int	4			NUMBER
numFields	Survey	SSA	No. of fields in the survey	int	4			NUMBER