VIII. Post-Cryo Data Release

2. Post-Cryo Data Products

c. Single Exposure (Level 1) Metadata Column Descriptions

ii. Post-Cryo Preliminary Data Release

The Post-Cryo Preliminary Data Release is superseded by the 2013 Post-Cryo Data Release. Please use the Post-Cryo Single-Exposure (Level 1) Metadata Table.

The following table contains brief descriptions of all metadata information that is relevant to the processing of Single-exposure (level 1) images and the extraction of sources from the corresponding Single-exposure images. The table contains the unique scan ID for a specific scan frame and the reconstructed right ascension and declination of the level 1b frame center. Much of the information in this table is processing-specific, and may not be of interest to general users (e.g. flags indicating whether frames have been processed or not, and the date and time for starting of the pipeline, etc.). The metadata table also contains some characterization and derived statistics of the Single-expsoure image frames, basic photometric parameters used for photometry and derived statistics for extracted sources and artifacts. For example, it contains median pixel values of the coadded sky coverage map, the number of sources with profile-fit photometry Signal-to-Noise (SNR) greater than 3, and the total number of real sources affected by artifacts such as electronic ghosts, etc.

The columns in the following table are:

Column Name: The parameter name in the Database table. Click on this to go to the section of the Explanatory Supplement section in which the derivation and/or usage of that parameter is described in greater detail.

Format: The ASCII-equivalent format of the field in the Database, expressed in "C"-readable notation. This is useful when parsing the aligned tabular output from IRSA/Gator. Although the data values will conform to these formats, the actual width of the field in the Gator output may be padded with extra blank spaces to accommodate column headers. Note that some fields contain null values that will require special handling when parsing Database tables from IRSA/Gator output.

Units: The units of the parameter. A value of "----" in this column means that the parameter is dimensionless or non-numeric.

nulls: A "yes" in this column means that this parameter may be null in the Table. A "yes" value does not necessarily mean that there are null values, only that they are allowed by the IRSA/WISE database server. A "no" means that there will always be a value in this column in the Table.

Description: A brief description of the parameter and its values.

Column Name	Format	Units	nulls	Description
scan_id	%6s	----	no	Scan identifier. This is a six character string that identifies a block of survey exposures that are acquired between two flight system maneuvers, such as reorientation of the instrument boresight near the ecliptic poles, or slews to acquire TDRSS for data downlink contacts. Because maneuvers often take place near the ecliptic poles, the scan number is roughly associated with a half-orbit's worth of images. However, scans can cover less or more than half of the arc between ecliptic poles. The scan_id has the general form SSSSSx, where SSSSS is a zero-filled, five-digit integer that is twice the WISE orbit number. The orbit number increments each time the flight system passes the north ecliptic pole (NEP). Orbit number 1 was defined to start with the fictitious NEP passage immediately prior to WISE launch. x is a letter assigned based on sequential count of scans started in a specific half-orbit. The first scan has x="a", the next x="b", up to a maximum of x="d" for scans in the Post-Cryo Preliminary Release. The first scan whose data are used in the Post-Cryo Preliminary Data Release is scan 08745a. This was the first scan after the NEP crossing in the 4372nd WISE orbit. The final scan included in the Release is 12514a, the first scan after the SEP crossing in the 6257th WISE orbit.
frame_num	%3d	----	no	Number of the frameset on which this source was extracted. The identifier has the general form MMM, a zero-filled three-digit number. The frameset number is computed based on time bins which count from the scan start time: fr_num = int[(((frame_utc - dt_beg) - scan_start_utc)/bin_size] + 1 where int[] means truncate to an integer frame_utc is the nominal frame exposure center UTC (when the boresite crosses the image center) in seconds dt_beg is 4.4s. This is a nominal offset to approximate when the exposure began scan_start_utc is the scan start time in seconds bin_size is 10s. For example, a frame with a start time 1234 secs after the scan start time would have a frame number of 124. N.B. Frame_num is not a frameset sequence number As a result of using a 10 sec bin, every 11th frame skips a number, so it is normal to see breaks in the frame numbering and it doesn't indicate missing data. Because frameset numbering is based on the predicted scan start time from the survey plan, and because frameset data may not start being acquired until well after the start of the scan, frameset numbers often do not start at 1 for a scan.
date_proc	%20s	datetimeZ	no	The date and time of the start of WISE pipeline processing in Coordinated Universal Time (UTC). For example, scan 00945a, frameset number 179 was processed starting at 2010-04-30 03:32:27.
elapsed_t	%7.2f	second	no	The elapsed processing time from the start of the WISE pipeline processing, in units of seconds. This is wall clock time.
ucpu_t	%7.2f	sec	no	User CPU time for pipeline processing, in seconds.
scpu_t	%7.2f	sec	no	System CPU time for pipeline processing, in seconds.
status	%2d	----	no	This integer describes how the multi-frame pipeline terminated. A status of 0 means that the processing was successfully executed; any other status value means it failed. All status values in the metadata will be 0.
ra0	%10.6f	deg	no	Right ascension (J2000) of the raw image frame (level 0) center.
dec0	%10.2f	deg	no	Declination (J2000) of the raw image frame (level 0) center.
crota0	%17.12f	deg	no	Image twist of the raw image (level 0): the position of the image y-axis West of North at the EQUINOX; in the opposite direction of the conventional Position Angle, where position angle (P.A.) = -CROTA0.
rssrate	%17.14f	arcmin/s	no	The root square sum of the three telescope axes spacecraft scan rates.
moon_sep	%7.3f	deg	no	The angular distance from the frame center to the Moon.
saa_sep	%7.3f	deg	no	The angular distance from the frame center to South Atlantic Anomaly (SAA) boundary.
ra	%10.6f	deg	no	The right ascension (J2000) of the position-reconstructed Single-expsoure frame (level 1b) center with respect to the 2MASS PSC reference frame.
dec	%10.6f	deg	no	The declination (J2000) of the position-reconstructed Single-exposure frame (level 1b) center with respect to the 2MASS PSC reference frame.
crota	%17.12f	deg	no	Image twist of the position-reconstructed, Single-exposure frame (level 1b): the position of the image y-axis West of North at the EQUINOX; in the opposite direction of the conventional Position Angle, where position angle (P.A.) = -CROTA.
bandbits	%2d	----	no	Bit-wise flag that indicates which bands have been processed, starting at band 1 = bit 0.
w1bandrun	%1d	----	no	This flag indicates whether band 1 has been processed; 1 means yes and 0 means no.
w2bandrun	%1d	----	no	This flag indicates whether band 2 has been processed; 1 means yes and 0 means no.
date_obs	%24s	datetimeZ	no	The date and time of the mid-point of the frameset exposure, in UTC. The mid-point is defined as the time the optical boresight crosses the center of the WISE focal planes. This time is the same for both bands.
mjd	%12.6f	day	yes	The Modified Julian Date of the mid-point of the frameset exposure. The mid-point is defined as the time the optical boresight crosses the center of the WISE focal planes. This time is the same for both bands.
wsds_vsn	%20s	----	no	The version number of the WISE pipeline used for this current data release.
date_dbprep	%20s	datetimeZ	no	The date and time when the data was prepared by the WISE archive software DBPREP for the archive loading, in UTC.
draf	%8.3f	arcsec	no	The true-angular difference in RA between the band-frame centers before and after position reconstruction, for the lowest band processed.
ddecf	%8.3f	arcsec	no	The angular difference in declination between the band-frame centers before and after position reconstruction, for the lowest band processed.
dpaf	%11.3f	arcsec	no	The difference in the frame position angle before and after position reconstruction, for the lowest band processed.
sigraf	%9.6f	arcsec	no	The final band-frame sigma on RA for the lowest band processed.
sigdcf	%9.6f	arcsec	no	The final band-frame sigma on declination for the lowest band processed.
sigpaf	%7.3f	arcsec	no	The final band-frame sigma on PA for lowest band processed.
qflgsf	%9s	----	no	The single-frame positional reconstruction quality flag.
band_prex	%1d	----	no	The lowest band processed by the Single-frame positional reconstruction pipeline (SFPREX). This band is used for calculating draf, ddecf, dpaf, sigraf, sigdcf, and sigpaf.
w1refmean	%12.6f	DN	no	The mean reference pixel value for the reference pixel region of the Single-exposure frame for band 1.
w2refmean	%12.6f	DN	no	The mean reference pixel value for the reference pixel region of the Single-exposure frame for band 2.
w1refmedian	%12.6f	DN	no	The median reference pixel value for the reference pixel region of the Single-exposure frame for band 1.
w2refmedian	%12.6f	DN	no	The median reference pixel value for the reference pixel region of the Single-exposure frame for band 2.
w1refmed16ptile	%12.6f	DN	no	A robust estimate of the sigma in reference pixel values calculated from the difference of the 50th - 16th percentiles of the reference pixel distribution of the Single-exposure frame for band 1.
w2refmed16ptile	%12.6f	DN	no	A robust estimate of the sigma in reference pixel values calculated from the difference of the 50th - 16th percentiles of the reference pixel distribution of the Single-exposure frame for band 2.
w1msknumtotbad	%8d	----	no	The number of pixels in the single-exposure frame that were tagged in the frame mask with a non-zero value for band 1. Not all conditions under which pixels were tagged are fatal.
w2msknumtotbad	%8d	----	no	The number of pixels in the single-exposure frame that were tagged in the frame mask with a non-zero value for band 2. Not all conditions under which pixels were tagged are fatal.
w1msknumsat	%8d	----	no	The number of pixels in the single-exposure frame that saturated at any sample-up-the-ramp read for band 1.
w2msknumsat	%8d	----	no	The number of pixels in the single-exposure frame that saturated at any sample-up-the-ramp read for band 2.
w1intnspikelo	%8d	----	no	The number of low valued "pixel-spike" outliers falling in the low-tail of the frame-pixel distribution for band 1. These are defined as spatial outliers, i.e., with respect to other neighboring pixels.
w2intnspikelo	%8d	----	no	The number of low valued "pixel-spike" outliers falling in the low-tail of the frame-pixel distribution for band 1. These are defined as spatial outliers, i.e., with respect to other neighboring pixels.
w1intnspikehi	%8d	----	no	The number of high valued "pixel-spike" outliers falling in the high-tail of the frame-pixel distribution for band 1. These are defined as spatial outliers, i.e., with respect to other neighboring pixels.
w2intnspikehi	%8d	----	no	The number of high valued "pixel-spike" outliers falling in the high-tail of the frame-pixel distribution for band 2. These are defined as spatial outliers, i.e., with respect to other neighboring pixels.
w1intmedian	%12.6f	DN	no	The median pixel value in the intensity image of the single-exposure frame for band 1.
w2intmedian	%12.6f	DN	no	The median pixel value in the intensity image of the single-exposure frame for band 2.
w1intfuzmode	%12.6f	DN	no	An approximate measure of the modal pixel value in the intensity image of the single-exposure frame for band 1.
w2intfuzmode	%12.6f	DN	no	An approximate measure of the modal pixel value in the intensity image of the single-exposure frame for band 2.
w1intsigltmadmed	%12.6f	DN	no	The lower-tail median absolute deviation from the median (a robust estimate of sigma) for pixels in the intensity image of the single-exposure frame for band 1.
w2intsigltmadmed	%12.6f	DN	no	The lower-tail median absolute deviation from the median (a robust estimate of sigma) for pixels in the intensity image of the single-exposure frame for band 2.
w1intmed16ptile	%12.6f	DN	no	A robust estimate of sigma using the difference of the 50th - 16th percentile values for pixels in the intensity image of the single-exposure frame for band 1.
w2intmed16ptile	%12.6f	DN	no	A robust estimate of sigma using the difference of the 50th - 16th percentile values for pixels in the intensity image of the single-exposure frame for band 2.
w1intmed84ptile	%12.6f	DN	no	An estimate of sigma using the difference of the 84th - 50th percentile values for pixels in the intensity image of the single-exposure frame for band 1. It will be biased high if a high source density is present.
w2intmed84ptile	%12.6f	DN	no	An estimate of sigma using the difference of the 84th - 50th percentile values for pixels in the intensity image of the single-exposure frame for band 2. It will be biased high if a high source density is present.
w1intratrange	%12.6f	----	no	The ratio of the (84th percentile - mode) / (mode - 16th percentile) for pixels in the intensity image of the single-exposure frame for band 1.
w2intratrange	%12.6f	----	no	The ratio of the (84th percentile - mode) / (mode - 16th percentile) for pixels in the intensity image of the single-exposure frame for band 2.
w1uncmedian	%12.6f	DN	no	Median uncertainty pixel value for band 1.
w2uncmedian	%12.6f	DN	no	Median uncertainty pixel value for band 2.
w1uncratltmadmed_med	%12.6f	----	no	The ratio of w1intsigltmadmed/w1uncmedian, for band 1. It is effectively a pseudo-χ² measure for pixels in the single-exposure frame.
w2uncratltmadmed_med	%12.6f	----	no	The ratio of w2intsigltmadmed/w2uncmedian, for band 2. It is effectively a pseudo-χ² measure for pixels in the single-exposure frame.
w1uncrat16ptile_med	%12.6f	----	no	The ratio of w1intmed16ptile/w1uncmedian, for band 1. It is effectively a pseudo-χ² measure for pixels in the single-exposure frame.
w2uncrat16ptile_med	%12.6f	----	no	The ratio of w2intmed16ptile/w2uncmedian, for band 2. It is effectively a pseudo-χ² measure for pixels in the single-exposure frame.
w1unclocscal1	%12.6f	----	no	The ratio of the local RMS in intensity pixel fluctuations from the 50th-16th percentile to the local median pixel uncertainty from the model, for band 1. It is analogous to other pseudo-χ² measures defined above but is more robust against the presence of sources and/or bright extended structure.
w2unclocscal1	%12.6f	----	no	The ratio of the local RMS in intensity pixel fluctuations from the 50th-16th percentile to the local median pixel uncertainty from the model, for band 2. It is analogous to other pseudo-χ² measures defined above but is more robust against the presence of sources and/or bright extended structure.
w1unclocscal2	%12.6f	----	no	The ratio of the local RMS in intensity pixel fluctuations using the lower-tail deviation from the mode to the modal pixel uncertainty from the model, for band 1. It is analogous to the pseudo-χ² measures defined above, but is even more robust against the presence of sources and bright, extended structure.
w2unclocscal2	%12.6f	----	no	The ratio of the local RMS in intensity pixel fluctuations using the lower-tail deviation from the mode to the modal pixel uncertainty from the model, for band 2. It is analogous to the pseudo-χ² measures defined above, but is even more robust against the presence of sources and bright, extended structure.
w1npn	%2d	----	no	The number of different Point-Spread-Functions used in a grid over each image frame in band 1. These PSFs take into account the differences in distortion across the frames.
w2npn	%2d	----	no	The number of different Point-Spread-Functions used in a grid over each image frame in band 2. These PSFs take into account the differences in distortion across the frames.
nsrcall	%7d	----	no	The number of sources from the source detection subsystem loaded into the photometry subsystem for the frameset.
w1zero	%8.4f	mag	no	The photometric zero point magnitude for the Single-exposure image for band 1.
w2zero	%8.4f	mag	no	The photometric zero point magnitude for the Single-exposure image for band 2.
w1rap_1	%6.3f	arcsec	yes	The radius of circular aperture 1, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_1	%6.3f	arcsec	yes	The radius of circular aperture 1, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_2	%6.3f	arcsec	yes	The radius of circular aperture 2, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_2	%6.3f	arcsec	yes	The radius of circular aperture 2, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_3	%6.3f	arcsec	yes	The radius of circular aperture 3, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_3	%6.3f	arcsec	yes	The radius of circular aperture 3, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_4	%6.3f	arcsec	yes	The radius of circular aperture 4, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_4	%6.3f	arcsec	yes	The radius of circular aperture 4, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_5	%6.3f	arcsec	yes	The radius of circular aperture 5, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_5	%6.3f	arcsec	yes	The radius of circular aperture 5, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_6	%6.3f	arcsec	yes	The radius of circular aperture 6, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_6	%6.3f	arcsec	yes	The radius of circular aperture 6, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_7	%6.3f	arcsec	yes	The radius of circular aperture 7, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_7	%6.3f	arcsec	yes	The radius of circular aperture 7, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1rap_8	%6.3f	arcsec	yes	The radius of circular aperture 8, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w2rap_8	%6.3f	arcsec	yes	The radius of circular aperture 8, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3.
w1stap	%6.3f	arcsec	no	The radius in arcseconds of the standard circular aperture used for aperture photometry in band 1, nominally 8.25 arcseconds.
w2stap	%6.3f	arcsec	no	The radius in arcseconds of the standard circular aperture used for aperture photometry in band 2, nominally 8.25 arcseconds.
ntable	%7d	----	no	The total number of sources extracted in the photometry subsystem in the Single-exposure image frameset.
nwpro_adb	%7d	----	no	The number of sources in the frameset which were actively deblended before performing profile-fit photometry.
npro_nbad	%7d	----	no	The number of sources in the frameset whose profile fitting photometry failed with an uncertainty value less than 0.0.
w1n3sig	%7d	----	no	The number of sources in the frameset whose profile-fit photometry have SNR > 3 for band 1.
w2n3sig	%7d	----	no	The number of sources in the frameset whose profile-fit photometry have SNR > 3 for band 2.
w1n3sig_only	%7d	----	no	The number of sources in the frameset whose profile-fit photometry have SNR > 3 in band 1 only.
w2n3sig_only	%7d	----	no	The number of sources in the frameset whose profile-fit photometry have SNR > 3 in band 2 only.
n12	%7d	----	no	The number of sources in the frameset whose profile-fit photometry have SNR > 3 in bands 1 and 2.
nrchi_0_05	%7d	----	no	The number of sources in the frameset whose profile-fit photomery have rchi2 values between 0 and 0.5.
nrchi_05_2	%7d	----	no	The number of sources in the frameset whose profile-fit photomery have rchi2 values between 0.5 and 2.
nrchi_2_5	%7d	----	no	The number of sources in the frameset whose profile-fit photomery have rchi2 values between 2 and 5.
nrchi_5_15	%7d	----	no	The number of sources in the frameset whose profile-fit photomery have rchi2 values between 5 and 15.
nrchi_15	%7d	----	no	The number of sources in the frameset whose profile-fit photomery have rchi2 values greater than 15.
nblend_1	%7d	----	no	The number of sources in the frameset which were not deblended before performing profile-fit photometry.
nblend_2	%7d	----	no	The number of sources in the frameset which were actively deblended into 2 individual sources.
nblend_3	%7d	----	no	The number of sources in the frameset which were actively deblended into 3 individual sources.
nblend_4	%7d	----	no	The number of sources in the frameset which were actively deblended into 4 individual sources.
nblend_5	%7d	----	no	The number of sources in the frameset which were actively deblended into 5 or more individual sources.
w1n_rdiff	%6d	----	no	The number of real sources which are flagged as contaminated by diffraction spikes in band 1.
w2n_rdiff	%6d	----	no	The number of real sources which are flagged as contaminated by diffraction spikes in band 2.
w1n_rlatent	%6d	----	no	The number of real sources which are flagged as contaminated by latents in band 1.
w2n_rlatent	%6d	----	no	The number of real sources which are flagged as contaminated by latents in band 2.
w1n_roghost	%6d	----	no	The number of real sources which are flagged as contaminated by optical ghosts in band 1.
w2n_roghost	%6d	----	no	The number of real sources which are flagged as contaminated by optical ghosts in band 2.
w1n_sdiff	%6d	----	no	The number of sources which are flagged as spurious detections of diffraction spikes in band 1.
w2n_sdiff	%6d	----	no	The number of sources which are flagged as spurious detections of diffraction spikes in band 2.
w1n_slatent	%6d	----	no	The number of sources which are flagged as spurious detections of latents in band 1.
w2n_slatent	%6d	----	no	The number of sources which are flagged as spurious detections of latents in band 2.
w1n_soghost	%6d	----	no	The number of sources which are flagged as spurious detections of optical ghosts in band 1.
w2n_soghost	%6d	----	no	The number of sources which are flagged as spurious detections of optical ghosts in band 2.
w1n_rtot	%6d	----	no	The total number of real sources which are flagged as contaminated by artifacts in band 1.
w2n_rtot	%6d	----	no	The total number of real sources which are flagged as contaminated by artifacts in band 2.
n_rtot	%6d	----	no	The total number of real sources which are flagged as contaminated by artifacts in any band.
w1n_stot	%6d	----	no	The total number of spurious sources which are flagged as spurious detections of artifacts in band 1.
w2n_stot	%6d	----	no	The total number of spurious sources which are flagged as spurious detections of artifacts in band 2.
n_stot	%6d	----	no	The total number of spurious sources which are flagged as spurious detections of artifacts in any band.
qa_status	%9s	----	no	This string indicates Quality Assurance status for the scan and frameset: "Prelim" means only preliminary Quality Assurance has been performed by the automated QA subsystem; "Reviewed" means the QA data has been examined and scores corrected by a QA team member; "Final" means the QA scores have been finalized.
qual_frame	%2d	----	no	This integer indicates the quality score value for the Single-exposure image frameset, with values of 0 (poor quality), 5, or 10 (high quality). The value is determined by the minimum of the quality factors qc_fact, qn_fact, and qi_fact, multiplied by ten.
qc_fact	%3.1f	----	no	This quality factor gauges the quality of completion of the Single-exposure image frameset. If the status value from the processing pipeline was equal to 0 (indicating a problem-free completion), then qc=1.0. Otherwise, qc=0.0 because the frameset failed to complete processing. All framesets in the Database have received qc values of 1.0.
qi_fact	%3.1f	----	no	This quality factor gauges the image shape quality of the Single-exposure image frameset. It checks for potential image smearing by using the axial ratio of the PSF calculated from a subset of sources in the frameset. The value of qi is 1.0 if the axial ratio b/a > 0.60; otherwise it is 0.0.
qn_fact	%3.1f	----	no	This quality factor indicates the background and noise characteristics quality of the Single-exposure frameset.
qa_fact	%3.1f	----	no	This quality factor gauges the astrometric quality. If the standard deviation of WISE positions with respect to the 2MASS Point Source Catalog positions is > 0.5 arcsec on each axis (or 0.71 arcsec RSS), for sources having SNR > 20 in at least one band, then qa=1.0. Otherwise, qa=0.0.
qual_scan	%2d	----	no	This integer indicates the quality score value for the scan containing the Single-exposure image frameset, with values of 0 (poor quality), 5, or 10 (high quality). The value is determined by the minimum of the quality factors qs1_fact, qs5_fact, and qp_fact, multiplied by ten.
qs1_fact	%3.1f	----	no	This quality factor indicates the quality of scan synchronization as judged from the overall 1x1 PSF grid computed by the PSF Moments routine and evaluated based on the effective number of noise pixels.
qs5_fact	%3.1f	----	no	This quality factor indicates the quality of scan synchronization as judged from the overall 5x5 PSF grid computed by the PSF Moments routine and evaluated based on the effective number of noise pixels.
qp_fact	%3.1f	----	no	This quality factor indicates the scan photometric quality. If the scan's photometric zero-point offset computed using profile-fit photometry (pzp) falls within a certain range about 0, the value of qp_fact is 1.0; otherwise it is 0.0.
load_id	%3d	----	no	A unique integer ID that identifies the archive data load batch in the archive ingest procedure that contains the scan and frameset.
cntr	%10d	----	no	Unique sequential identification number for the metadata table entry.
x	%19.16f	----	yes	unit sphere (x,y,z) position x value
y	%19.16f	----	yes	Unit sphere (x,y,z) position y value
z	%19.16f	----	yes	Unit sphere (x,y,z) position z value
spt_ind	%9d	---	yes	HTM spatial (x,y,z) index key

Last Update: 2013 April 11