
diffObjID	dimensionless 	BIGINT 	8 	NA 	diff object identifier
uniquePspsDFid dimensionless BIGINT  8	NA	unique psps id (combination of batch_id, and counter) provided by ipptopsps
diffDetID 	dimensionless 	BIGINT 	8 	NA 	diff detection identifier
diffDetMetaID 	dimensionless 	BIGINT 	8 	NA 	diff detection meta identifier
ippDetectID 	dimensionless 	BIGINT 	8 	NA 	ipp detection id generated by IPP
ippObjID 	dimensionless 	BIGINT 	8 	NA 	ipp object id generated by IPP
filterID 	dimensionless 	TINYINT	1 	NA 	filter ID: g=1, r=2, i=3, z=4, y=5, w=6, ...
surveyID 	dimensionless 	TINYINT	1 	NA 	survey flag identifierr
randomDiffID 	dimensionless 	FLOAT 	8 	NA 	random diff id  
skyCellID       dimensionless   REAL    4       -999    single float giving PrimaryCell.SkyCell identifier 
dvoRegionID     dimensionless   INT     4          0    identifier to dvo spatial region
obsTime 	MeanJulianDays 	FLOAT 	8 	-999 	Time of mid observation of positive detection in Mean Julian Days of positive detection
xPos 		pixels 		REAL 	4 	-999 	measured x on diff image sky cell PSF fit
yPos 		pixels 		REAL 	4 	-999 	measured y on diff image sky cell from PSF fit
xPosErr 	pixels 		REAL 	4 	-999 	estimated error in x
yPosErr 	pixels 		REAL 	4 	-999 	estimated error in y
pltScale        arcsec/pix      REAL    4       -999    plate scale at this location (from DVO)
posAngle        degrees         REAL    4       -999    position angle (sky-to-chip) at this location (from DVO)
----------------------------------------------------    next 8 came from old DiffDetCalib, zp derived from cpt tables of BOTH images 
ra              degrees         FLOAT   8       NA      Right Ascension
dec             degrees         FLOAT   8       NA      Declination
raErr           arcsec          REAL    4       NA      Right Ascension error -> posErr because RA,Dec same?
decErr          arcsec          REAL    4       NA      Declination error
zp              magnitude       REAL    4       0       zeropoint (all that is needed to convert adu/sec to AB mag), no zpErr
telluricExt     magnitude       REAL    4       NA      estimated extinction due to non-photometric conditions  
expTime         seconds         REAL    4       -999    exposure time (informational)
airMass         dimensionless   REAL    4       0       airmass (informational)
-----------------------------------------------------   attributes of positive detection
DpsfFlux 	adu/seconds 	REAL 	4 	-999 	PSF instrumental flux (in analog-to-digital units/sec) or adu/sec
DpsfFluxErr 	adu/seconds 	REAL 	4 	-999 	estimated error in flux
DpsfMajorFWHM    arcsec          REAL    4       -999    model PSF width in major axis
DpsfMinorFWHM    arcsec          REAL    4       -999    model PSF width in minor axis
DpsfTheta        degrees         REAL    4       -999    model PSF orientation angle degrees East of North
DpsfCore         dimensionless   REAL    4       -999    model PSF core parameter [k in (1 + kz + z^1.66)]
DpsfQf 		dimensionless 	REAL 	4 	-999 	PSF coverage factor
DpsfQfPerfect 	dimensionless 	REAL 	4 	-999 	PSF-weighted fraction of pixels totally unmasked
DpsfChiSq 	dimensionless 	REAL 	4 	-999 	reduced-chisq of the psf model fit. (ndof?, npix?)
DpsfLikelihood 	dimensionless 	REAL 	4 	-999 	PSF likelihood
DmomentXX 	arcsec^2     	REAL 	4 	-999 	moment XX
DmomentXY 	arcsec^2     	REAL 	4 	-999 	moment XY
DmomentYY 	arcsec^2     	REAL 	4 	-999 	momeny YY
DmomentR1 	arcsec       	REAL 	4 	-999 	first radial moment 
DmomentRH 	arcsec       	REAL 	4 	-999 	r^1/2 weighted moment
DmomentM3C 	arcsec^3     	REAL 	4 	-999 	3rd moment sin(theta) 
DmomentM3S 	arcsec^3     	REAL 	4 	-999 	3rd moment cos(theta) 
DmomentM4C 	arcsec^4     	REAL 	4 	-999 	4th moment sin(theta)
DmomentM4S  	arcsec^4     	REAL 	4 	-999 	4th moment cos(theta) 
DapFlux 		adu/seconds 	REAL 	4 	-999 	Aperture flux
DapFluxErr 	adu/seconds 	REAL 	4 	-999 	Aperture flux error
DapFillF         dimensionless   REAL    4       -999    Aperture fill factor 
DkronFlux 	adu/seconds 	REAL 	4 	-999 	Kron flux
DkronFluxErr 	adu/seconds 	REAL 	4 	-999 	Kron flux error
DkronRad 	raw pixels 	REAL 	4 	-999 	Kron radius
------------------------------------------------------- from diff image cmf/smf files 
diffNPos        dimensionless   REAL    4       -999    npix > 3sigma
diffFRatio      dimensionless   REAL    4       -999    fPos/(fPos +fNeg)
diffNBad        dimensionless   REAL    4       -999    nPos/(nPos+nNeg)
diffNMask       dimensionless   REAL    4       -999    nPos/(nPos + nMask)
diffNAll        dimensionless   REAL    4       -999    nPos/(nPos + nMask + nNeg)
diffPdist       arcsec          REAL    4       -999    distance to positive match source
diffNdist       arcsec          REAL    4       -999    distance to negative match source
diffPSN         dimensionless   REAL    4       -999    signal to noise of pos match source
diffNSN         dimensionless   REAL    4       -999    signal to noise of neg match source
-------------------------------------------------------
Dsky 		adu/sec/pixel 	REAL 	4 	-999 	PSF sky level at source
DskyErr 		adu/sec/pixel 	REAL 	4 	-999 	estimated error in sky
DinfoFlag 	dimensionless 	INT     4 	-999 	flag indicating provenance information
DinfoFlag2	dimensionless 	INT     4 	-999 	flag indicating provenance information
DinfoFlag3	dimensionless 	INT     4 	-999 	flag indicating provenance information
dataRelease 	dimensionless 	TINYINT	1 	NA 	Data release when this detection was originally taken. Recalibrations do not affect this value.
