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# E.S.O. - VLT project
#
# $Id: ESO-DFS-DIC.HAWKI_QC,v 1.21 2012-12-04 09:41:12 cgarcia Exp $
# $Author: cgarcia $
# $Date: 2012-12-04 09:41:12 $
# $Revision: 1.21 $
#
#******************************************************************************
# NAME
# ESO-DFS-DIC.HAWKI_QC - Data Interface Dictionary for HAWKI Quality
# control (level 1) parameters.
# -----------------------------------------------------------------------------
Dictionary Name: ESO-DFS-DIC.HAWKI_QC
Scope: QC
Source: ESO SDD/PSD
Version Control: "$Id: ESO-DFS-DIC.HAWKI_QC,v 1.21 2012-12-04 09:41:12 cgarcia Exp $"
Revision: 1.0
Date: 2007-08-20
Status: submitted
Description: HAWKI Quality Control dictionary.
# QC Category
Parameter Name: QC RON MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the RONs
Description: Mean of the RON (QC RONi) from each input frame
Parameter Name: QC RON MED
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the RONs
Description: Median of the RON (QC RONi) from each input frame
Parameter Name: QC RON STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard Deviation of the RONs
Description: Standard Deviation of the RON (QC RONi) from each
input frame
Parameter Name: QC RONi
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Read-out noise
Description: Measured read-out noise of the whole array of each
input frame
Parameter Name: QC DARK MED
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the medians from each input frame
Description: Median of the medians from each input frame
Parameter Name: QC DARK MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the medians from each input frame
Description: Mean of the medians from each input frame
Parameter Name: QC DARK STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard dev. of the medians from each input frame
Description: Standard dev. of the medians from each input frame
Parameter Name: QC DARK NBADPIX
Class: header|qc-log
Context: process
Type: int
Value Format: %d
Unit: pixels
Comment Field: Number of bad pixels
Description: Number of bad pixels
Parameter Name: QC DARK VCi MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of video channel <i> subregion of the current extension
Description: Mean of video channel <i> subregion of the current extension
Parameter Name: QC DARK VCi MED
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of video channel <i> subregion of the current extension
Description: Median of video channel <i> subregion of the current extension
Parameter Name: QC DARK VCi STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of video channel <i> subregion of the current extension
Description: Standard deviation of video channel <i> subregion of the current extension
Parameter Name: QC FLAT NORM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Normalisation factor
Description: Normalisation factor
Parameter Name: QC FLAT MEDMIN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pix
Comment Field: Minimum value of median values.
Description: For each frame, the median is computed, this keyword is
the minimum median values.
Parameter Name: QC FLAT MEDMAX
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pix
Comment Field: Maximum value of median values.
Description: For each frame, the median is computed, this keyword is
the maximum median values.
Parameter Name: QC FLAT MEDMED
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median value of median values.
Description: For each frame, the median is computed, this keyword is
the median of the median values.
Parameter Name: QC FLAT MEDMEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Average value of median values.
Description: For each frame, the median is computed, this keyword is
the average of the median values.
Parameter Name: QC FLAT MEDSTDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of median values.
Description: For each frame, the median is computed, this keyword is
the standard deviation of the median values.
Parameter Name: QC FLAT MEDRANG
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Range of values of median values.
Description: For each frame, the median is computed, this keyword is
the maximum minus the minumum values.
Parameter Name: QC FLAT MEDNRANG
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Relative range of values of median values.
Description: For each frame, the median is computed, this keyword is
the maximum minus the minumum values divided by the median
Parameter Name: QC FLAT NBADPIX
Class: header|qc-log
Context: process
Type: int
Value Format: %d
Unit: pixels
Comment Field: Number of bad pixels
Description: Number of bad pixels
Parameter Name: QC DETLIN MEDA
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: Median value
Description: Median value of the A coefficients
Parameter Name: QC DETLIN MEDB
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: Median value
Description: Median value of the B coefficients
Parameter Name: QC DETLIN MEDC
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: Median value
Description: Median value of the C coefficients
Parameter Name: QC DETLIN MEDQ
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: Median value
Description: Median value of the Q
Parameter Name: QC DETLIN LAMP
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: percent
Comment Field: Lamp stability
Description: Lamp stability
Parameter Name: QC BACKGD INSTMAG
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: The mean of all the image mean backgrounds in instrumental magnitudes.
Description: The mean of all the image mean backgrounds in instrumental magnitudes: -2.5*log10(backgd_mean/pixscale/pixscale/DIT).
Parameter Name: QC BACKGD STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: The standard deviation of all the image mean backgrounds.
Description: The standard deviation of all the image mean backgrounds.
Parameter Name: QC BACKGD MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: The mean of all the image mean backgrounds.
Description: The mean of all the image mean backgrounds.
Parameter Name: QC FWHM PIX
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: The median FWHM in the image [pixels]
Description: Median value of the full-width at half-maximum of all
detected objects in the final reduced frame.
Parameter Name: QC FWHM ARCSEC
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: arcsec
Comment Field: The median FWHM in the image [arcsec]
Description: Median value of the full-width at half-maximum of all
detected objects in the final reduced frame, multiplied
by the pixel size in arcsec/pixel.
Parameter Name: QC FWHM MODE
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: The mode FWHM in the image [pixels]
Description: The mode FWHM in the image [pixels]
Parameter Name: QC NBOBJS
Class: header|qc-log
Context: process
Type: integer
Value Format: %d
Unit: none
Comment Field: Number of detected objects in the combined image
Description: Number of detected objects in the combined image
Parameter Name: QC IQ
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: arcsec
Comment Field: Estimated image quality (arcsec)
Description: Estimated value of the image quality, based on
the median FWHM of all star-like objects in the
final product frame.
Parameter Name: QC OBJ ANGLE MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: degrees
Comment Field: Mean of the orientations of objects detected in an image
Description: Mean of the orientations of objects detected in an image
Parameter Name: QC OBJ ANGLE MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: degrees
Comment Field: Median of the orientations of objects detected in an image
Description: Median of the orientations of objects detected in an image
Parameter Name: QC OBJ ANGLE MIN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: degrees
Comment Field: Minimum of the orientations of objects detected in an image
Description: Minimum of the orientations of objects detected in an image
Parameter Name: QC OBJ ANGLE MAX
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: degrees
Comment Field: Maximum of the orientations of objects detected in an image
Description: Maximum of the orientations of objects detected in an image
Parameter Name: QC OBJ ANGLE STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: degrees
Comment Field: Standard deviations of the orientations of
objects detected in an image
Description: Standard deviations of the orientations of
objects detected in an image
Parameter Name: QC OBJ ELLIP MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: Mean of the ellipticities of objects detected in an image
Description: Mean of the ellipticities of objects detected in an image
Parameter Name: QC OBJ ELLIP MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: Median of the ellipticities of objects detected in an image
Description: Median of the ellipticities of objects detected in an image
Parameter Name: QC OBJ ELLIP MIN
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: Minimum of the ellipticities of objects detected in an image
Description: Minimum of the ellipticities of objects detected in an image
Parameter Name: QC OBJ ELLIP MAX
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: Maximum of the ellipticities of objects detected in an image
Description: Maximum of the ellipticities of objects detected in an image
Parameter Name: QC OBJ ELLIP STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit:
Comment Field: Standard deviations of the ellipticities of
objects detected in an image
Description: Standard deviations of the ellipticities of
objects detected in an image
Parameter Name: QC COMBINED POSX
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: Position in X of the first image
Description: Position in X of the first image
Parameter Name: QC COMBINED POSY
Class: header|qc-log
Context: process
Type: double
Value Format: %.2f
Unit: pix
Comment Field: Position in Y of the first image
Description: Position in Y of the first image
Parameter Name: QC FILTER OBS
Class: header|qc-log
Context: process
Type: string
Value Format: %20s
Unit:
Comment Field: Observation filter
Description: This is the filter used to observe the star. It might
be different from the one used to get the star
magnitude in the database.
Parameter Name: QC FILTER REF
Class: header|qc-log
Context: process
Type: string
Value Format: %20s
Unit:
Comment Field: Reference filter
Description: If the filter used for observation corresponds to an
unknown magnitude value in the database, an association
rule is used to see which other magnitude could be
used. In that case, this value differs from the
actually used filter for observation.
Parameter Name: QC AMBI RHUM AVG
Class: header|qc-log
Context: process
Type: double
Value Format: %.f
Unit:
Comment Field: (percent) ambient relative humidity @ 30/2 m
Description: Temporal mean of site ambient relative humidity
measured at sensor position i = 1/2 in 30m/2m height.
This parameter is delivered by the ASM at intervals
of typically 1 minute. This keyword stores the average
of all measured values during the zero-point
measurement.
Parameter Name: QC AIRMASS MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit:
Comment Field: Average airmass
Description: Average airmass during the zero-point acquisition.
Parameter Name: QC STDNAME
Class: header|qc-log
Context: process
Type: string
Value Format: %20s
Unit:
Comment Field: Standard star name
Description: Name of the standard star used for ZP computation
Parameter Name: QC STARMAG
Class: header|qc-log
Context: process
Type: double
Value Format: %g
Unit:
Comment Field: Standard star magnitude in observed filter
Description: Standard star magnitude in observed filter
Parameter Name: QC STARMAG H
Class: header|qc-log
Context: process
Type: double
Value Format: %g
Unit:
Comment Field: Standard star magnitude in H
Description: Standard star magnitude in H
Parameter Name: QC STARMAG J
Class: header|qc-log
Context: process
Type: double
Value Format: %g
Unit:
Comment Field: Standard star magnitude in J
Description: Standard star magnitude in J
Parameter Name: QC STARMAG K
Class: header|qc-log
Context: process
Type: double
Value Format: %g
Unit:
Comment Field: Standard star magnitude in K
Description: Standard star magnitude in K
Parameter Name: QC STARMAG Y
Class: header|qc-log
Context: process
Type: double
Value Format: %g
Unit:
Comment Field: Standard star magnitude in Y
Description: Standard star magnitude in Y
Parameter Name: QC SPECTYPE
Class: header|qc-log
Context: process
Type: string
Value Format: %s
Unit:
Comment Field: Standard star spectral type
Description: Standard star spectral type
Parameter Name: QC CATNAME
Class: header|qc-log
Context: process
Type: string
Value Format: %20s
Unit:
Comment Field: Standard star catalogue name
Description: Name of the catalogue from which the standard star
has been extracted.
Parameter Name: QC ZPOINT MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Field: Mean measured zero-point for all the chips.
Description: Mean measured zero-point for all the chips
Parameter Name: QC ATX0 MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Field: Mean extinction corrected zero-point for all the chips.
Description: Mean extinction corrected zero-point for all the chips
Parameter Name: QC ZPOINT
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Field: Measured zero-point for a given chip.
Description: Measured zero-point for a given chip.
Parameter Name: QC ATX0
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Field: Extinction corrected zero-point for a given chip.
Description: Extinction corrected zero-point for a given chip.
Parameter Name: QC ZPOINT EXT COEFF
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: mag/airmass
Comment Field: Extinction coefficient used in the computation of ATX0.
Description: Extinction coefficient used in the computation of ATX0.
Parameter Name: QC ZPOINT POSX
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pixels
Comment Field:
Description: X position of the standard star
Parameter Name: QC ZPOINT POSY
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pixels
Comment Field:
Description: Y position of the standard star
Parameter Name: QC ZPOINT FLUX
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field:
Description: Flux of the standard star
Parameter Name: QC ZPOINT PEAK
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field:
Description: Peak of the standard star
Parameter Name: QC ZPOINT BGD
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field:
Description: Background around the standard star
Parameter Name: QC ZPOINT FWHMX
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pixels
Comment Field:
Description: X FWHM of the standard star
Parameter Name: QC ZPOINT FWHMY
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pixels
Comment Field:
Description: Y FWHM of the standard star
Parameter Name: QC ZPOINT FWHM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: pixels
Comment Field:
Description: FWHM of the standard star
Parameter Name: QC ZPOINT FWHMX_AS
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: arcsec
Comment Field:
Description: X FWHM of the standard star
Parameter Name: QC ZPOINT FWHMY_AS
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: arcsec
Comment Field:
Description: Y FWHM of the standard star
Parameter Name: QC ZPOINT FWHM_AS
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: arcsec
Comment Field:
Description: FWHM of the standard star
Parameter Name: QC DATANCOM
Class: header|qc-log
Context: process
Type: int
Value Format: %d
Unit: number of files
Comment Field:
Description: Number of files used for the reduction
Parameter Name: QC RAW MINIMUM MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the minimum values of a list of raw frames
Description: Mean of the minimum values of a list of raw frames
Parameter Name: QC RAW MINIMUM MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the minimum values of a list of raw frames
Description: Median of the minimum values of a list of raw frames
Parameter Name: QC RAW MINIMUM MINIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Minimum of the minimum values of a list of raw frames
Description: Minimum of the minimum values of a list of raw frames
Parameter Name: QC RAW MINIMUM MAXIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Maximum of the minimum values of a list of raw frames
Description: Maximum of the minimum values of a list of raw frames
Parameter Name: QC RAW MINIMUM STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of the minimum values of a list of raw frames
Description: Standard deviation of the minimum values of a list of raw frames
Parameter Name: QC RAW MAXIMUM MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the maximum values of a list of raw frames
Description: Mean of the maximum values of a list of raw frames
Parameter Name: QC RAW MAXIMUM MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the maximum values of a list of raw frames
Description: Median of the maximum values of a list of raw frames
Parameter Name: QC RAW MAXIMUM MINIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Minimum of the maximum values of a list of raw frames
Description: Minimum of the maximum values of a list of raw frames
Parameter Name: QC RAW MAXIMUM MAXIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Maximum of the maximum values of a list of raw frames
Description: Maximum of the maximum values of a list of raw frames
Parameter Name: QC RAW MAXIMUM STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of the maximum values of a list of raw frames
Description: Standard deviation of the maximum values of a list of raw frames
Parameter Name: QC RAW MEDIAN MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the median values of a list of raw frames
Description: Mean of the median values of a list of raw frames
Parameter Name: QC RAW MEDIAN MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the median values of a list of raw frames
Description: Median of the median values of a list of raw frames
Parameter Name: QC RAW MEDIAN MINIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Minimum of the median values of a list of raw frames
Description: Minimum of the median values of a list of raw frames
Parameter Name: QC RAW MEDIAN MAXIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Maximum of the median values of a list of raw frames
Description: Maximum of the median values of a list of raw frames
Parameter Name: QC RAW MEDIAN STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of the median values of a list of raw frames
Description: Standard deviation of the median values of a list of raw frames
Parameter Name: QC RAW MEAN MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the mean values of a list of raw frames
Description: Mean of the mean values of a list of raw frames
Parameter Name: QC RAW MEAN MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the mean values of a list of raw frames
Description: Median of the mean values of a list of raw frames
Parameter Name: QC RAW MEAN MINIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Minimum of the mean values of a list of raw frames
Description: Minimum of the mean values of a list of raw frames
Parameter Name: QC RAW MEAN MAXIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Maximum of the mean values of a list of raw frames
Description: Maximum of the mean values of a list of raw frames
Parameter Name: QC RAW MEAN STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of the mean values of a list of raw frames
Description: Standard deviation of the mean values of a list of raw frames
Parameter Name: QC RAW RMS MEAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Mean of the rms values of a list of raw frames
Description: Mean of the rms values of a list of raw frames
Parameter Name: QC RAW RMS MEDIAN
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Median of the rms values of a list of raw frames
Description: Median of the rms values of a list of raw frames
Parameter Name: QC RAW RMS MINIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Minimum of the rms values of a list of raw frames
Description: Minimum of the rms values of a list of raw frames
Parameter Name: QC RAW RMS MAXIMUM
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Maximum of the rms values of a list of raw frames
Description: Maximum of the rms values of a list of raw frames
Parameter Name: QC RAW RMS STDEV
Class: header|qc-log
Context: process
Type: double
Value Format: %f
Unit: ADU
Comment Field: Standard deviation of the rms values of a list of raw frames
Description: Standard deviation of the rms values of a list of raw frames
Parameter Name: QC APERTURE_CORR
Class: header
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Format: [mag] 2 arcsec diam aperture flux correction.
Description: The aperture flux correction for stellar images due to
flux falling outside the aperture. Determined using
a curve-of-growth of a series of fixed-size apertures.
Alternative simple measure of image profile properties,
particularly the presence of extended PSF wings, as
such monitors optical properties of system; also
required for limiting magnitude computations.
Parameter Name: QC ELLIPTICITY
Class: header
Context: process
Type: double
Value Format: %f
Unit:
Comment Format: Mean stellar ellipticity.
Description: The detected image intensity-weighted second moments
will be used to compute the average ellipticity of
suitable signal:to:noise stellar images. Shot-noise
causes even perfectly circular stellar images to
have non-zero ellipticity but more significant values
are indicative of one of: optical, tracking and
autoguiding, or detector hardware problems.
Parameter Name: QC FLATRMS
Class: header
Context: process
Type: double
Value Format: %f
Unit:
Comment Format: RMS flatfield pixel sens per detector.
Description: RMS is defined here as the Gaussian equivalent MAD ie.
1.48*median-of-absolute-deviation from
unity after normalising by median level ie.
measuring the RMS sensitivity variation.
The RMS can later be compared with library
values for troubleshooting problems.
significantly with time.
Parameter Name: QC FLATRNG
Class: header
Context: process
Type: double
Value Format: %f
Unit ADU
Comment Format: [ADU] Ensemble range of flats
Description: This is the ensemble range of the backgrounds of a
set of flats
Parameter Name: QC IMAGE_SIZE
Class: header
Context: process
Type: double
Value Format: %f
Unit: arcsec
Comment Format: [arcsec] Mean stellar image FWHM.
Description: Measured from the average FHWM of stellar-classified
images of suitable signal:to:noise. The seeing will
obviously vary over the night with time, wavelength
(filter) and as airmass^0.6. This variation should
be predictable given local site seeing measures.
A comparison with the expected value can be used
as an indication of poor guiding, poor focus
or instrument malfunction.
Parameter Name: QC LIMITING_MAG
Class: header
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Format: [mag] Limiting mag ie. depth of exposure.
Description: Estimate of 5-sigma limiting mag for stellar-like
objects for each science observation, derived from
QCs ZPT_2MASS, SKY_NOISE, APERTURE_CORR. Can later
be compared with a target value to see if main survey
requirements (ie. usually depth) are met.
Parameter Name: QC MAGNZPT
Class: header
Context: process
Type: double
Value Format: %f
Unit:
Comment Format: Number of stars in zero point calc.
Description: The number of stars on this image used to
calculate the photometric zeropoint.
Parameter Name: QC MAGZERR
Class: header
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Format: [mag] Photometric zero point error.
Description: A measure of the RMS photometric zero point
error using an aperture of 1* the core radius.
Parameter Name: QC MAGZPT
Class: header
Context: process
Type: double
Value Format: %f
Unit: mag
Comment Format: [mag] Photometric zero point.
Description: A measure of the photometric zero point using
an aperture of 1* the core radius.
Parameter Name: QC MEAN_SKY
Class: header
Context: process
Type: double
Value Format: %f
Unit: adu
Comment Format: [adu] Mean sky level.
Description: Computed using a clipped median for each detector
Sky levels (perhaps not at Ks) should vary
smoothly over the night. Strange changes in
values may indicate a hardware fault.
Parameter Name: QC NOISE_OBJ
Class: header
Context: process
Type: integer
Value Format: %d
Unit:
Comment Format: Number of classified noise objects per frame.
Description: Measured using an object cataloguer combined with a
morphological classifier. The number of objects
classified as noise from frame-to-frame
should be reasonably constant; excessive numbers
indicate a problem.
Parameter Name: QC PARTICLE_RATE
Class: header
Context: process
Type: double
Value Format: %f
Unit: count/s/detector
Comment Format: [count/s/detector] Cosmic ray/spurion rate.
Description: Average no. of pixels rejected during combination of dark
frames, used to give an estimate of the rate of cosmic
ray hits for each detector. This can later be compared
with previous estimates and monitored.
Parameter Name: QC SATURATION
Class: header
Context: process
Type: double
Value Format: %f
Unit: adu
Comment Format: [adu] Saturation level of bright stars.
Description: Determined from maximum peak flux of detected stars from
exposures in a standard bright star field.
The saturation level*gain is a check on
the full-well characteristics of each detector.
Parameter Name: QC SKYBRIGHT
Class: header
Context: process
Type: double
Value Format: %f
Unit mag/arcsec**2
Comment Format: [mag/arcsec**2] Sky brightness
Description: Calibrated mean sky brightness
Parameter Name: QC SKY_NOISE
Class: header
Context: process
Type: double
Value Format: %f
Unit: adu
Comment Format: [adu] RMS sky noise.
Description: computed using a MAD estimator with respect to
median sky after removing large scale gradients.
The sky noise should be a combination of readout-noise,
photon-noise and detector quirks. Monitoring the
ratio of expected noise to measured provides a system
diagnostic at the detector level.
Parameter Name: QC WCS_DCRVAL1
Class: header
Context: process
Type: double
Value Format: %e
Unit: deg
Comment Format: [deg] Actual WCS zero point X - raw header value.
Description: Measure of difference between dead-reckoning
pointing and true position of the detector on sky.
Derived from current polynomial distortion model
and 6-constant detector model offset.
Parameter Name: QC WCS_DCRVAL2
Class: header
Context: process
Type: double
Value Format: %e
Unit: deg
Comment Format: [deg] Actual WCS zero point Y - raw header value.
Description: Measure of difference between dead-reckoning
pointing and true position of the detector on sky.
Derived from current polynomial distortion model
and 6-constant detector model offset.
Parameter Name: QC WCS_DTHETA
Class: header
Context: process
Type: double
Value Format: %e
Unit: deg
Comment Format: [deg] Actual WCS rotation PA - raw PA header value(h).
Description: Measure of difference between dead-reckoning
PA and true position angle of the detector.
Derived from current polynomial distortion model
and 6-constant detector model effective rotation term.
Parameter Name: QC WCS_SCALE
Class: header
Context: process
Type: double
Value Format: %e
Unit: deg/pixel
Comment Format: [deg/pixel] Measured WCS plate scale per detector.
Description: Measure of the average on-sky pixel scale of detector
after correcting using current polynomial distortion model
Parameter Name: QC WCS_SHEAR
Class: header
Context: process
Type: double
Value Format: %e
Unit: deg] Power of cross-terms in WCS solution [deg
Comment Format: [deg] Power of cross-terms in WCS solution [deg].
Description: Measure of WCS shear after normalising by plate scale
and rotation, expressed as an equivalent distortion
angle. Gives a simple measure of distortion problems
in WCS solution.
Parameter Name: QC WCS_RMS
Class: header
Context: process
Type: double
Value Format: %e
Unit: arcsec
Comment Format: [arcsec] Robust RMS of WCS solution for each detector.
Description: Robust average of residuals from WCS solution for each
detector. Measure of integrity of WCS solution.
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