             
--              The  "best available" measurements refer first to those objects with qfPerfect > 0.85 and good flags, 
--              but descends down a "waterfall logic" in ipp so that there exists a mean mag for less than ideal objects. The logic is given in Magnier etal 2013.

objID           dimensionless   BIGINT   8       NA      ODM object identifier index
gcObjID		dimensionless	BIGINT	 8	 NA 	ODM galactic coordinates identifier
gQfPerfect      dimensionless   REAL     4       -999    maximum psf qfPerfect from best available g band detections 
gMeanPSFMag     AB_magnitude    REAL     4       -999    mean g psf AB magnitude from best available measurements (best available as current defined by ipp "waterfall logic"  
gMeanPSFMagErr  AB_magnitude    REAL     4       -999    estimated error of best availalbe g-band psf AB magnitudes (individual errors added in quadrature)
gMeanPSFMagNct  dimensionless   SMALLINT 2       -999    number of best available detections included in mean psfMag 
gMeanPSFMagStd  dimensioless    REAL     4       -999    standard deviation of best available measurements - compared with MeanErr this is one measure of true variability  
gMinPSFMag      AB_magnitude    REAL     4       -999    minimum best available PSFMag - min and max are given for PSFMag as they may indicate variability.  
gMaxPSFMag      AB_magnitude    REAL     4       -999    maximum best available PSFMag   
					 
gMeanKronMag    AB_magnitude    REAL     4       -999    mean g kron AB magnitude from best available measurements     
gMeanKronMagErr AB_magnitude    REAL     4       -999    estimated error of mean g kron AB magnitude 
gMeanKronMagNct dimensionless   SMALLINT 2       -999    number of best available detections included mean Kron mag 
gMeanKronMagStd dimensioless    REAL     4       -999    standard deviation of best available measurements   
					 
gMeanApMag      AB_magnitude    REAL     4       -999    mean g kron AB magnitude from best available measurements
gMeanApMagErr   AB_magnitude    REAL     4       -999    estimated error of g kron AB magnitude mean
gMeanApMagNct   dimensionless   SMALLINT 2       -999    number of detections included in best available mean of Kron mag in g filter
gMeanApMagStd   dimensioless    REAL     4       -999    standard deviation of best available measurements   

gFlags          dimensionless   INT      4          0    flags for g mean [XXX secfilt.flags is 4byte] 
-- duplicate for other filters

[62 byte/obj/filter + 8 byte/filter]
