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VIMOS trending system: HISTORY report
Last update: 2012-01-15T03:16:26 (UT)
same group: X0_Y0 XX_YY XY_YX   Y0_TEMP
close window history: 2006 2007 2008 2009 2010   2011   2012   2013 2014   HEALTH
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*Date on this monitor changes at 21:00 UT
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Plot
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Symb
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Source
*
Average ? Thresholds ? N_
data
QC1
parameter
Data
downloads
Remarks
method value unit method value
1 QC1DB MEDIAN 8.36969 pix/mm VAL8.362,8.375 103 xx this | last_yr | all coefficient a(xx), Q2
2 QC1DB MEDIAN 8.38816 pix/mm VAL8.380,8.395 104 xx this | last_yr | all coefficient a(xx), Q1
3 QC1DB MEDIAN 8.36957 pix/mm VAL8.362,8.375 103 yy this | last_yr | all coefficient a(yy), Q2
4 QC1DB MEDIAN 8.38805 pix/mm VAL8.380,8.392 104 yy this | last_yr | all coefficient a(yy), Q1
5 QC1DB MEDIAN 8.39327 pix/mm VAL8.387,8.398 105 xx this | last_yr | all coefficient a(xx), Q3
6 QC1DB MEDIAN 8.39246 pix/mm VAL8.386,8.397 106 xx this | last_yr | all coefficient a(xx), Q4
7 QC1DB MEDIAN 8.39173 pix/mm VAL8.386,8.395 105 yy this | last_yr | all coefficient a(yy), Q3
8 QC1DB MEDIAN 8.39145 pix/mm VAL8.385,8.396 106 yy this | last_yr | all coefficient a(yy), Q4
*Data sources: QC1DB: QC1 database; LOCAL: local text file
Plot 1
data source:vimos_mask2ccd
(QC1 database)
dataset:xx
median:8.36969pix/mm
fixed thresholds:8.362...8.375pix/mm
N_data plotted:103
[click on plot for closeup]
Plot 2
data source:vimos_mask2ccd
(QC1 database)
dataset:xx
median:8.38816pix/mm
fixed thresholds:8.38...8.395pix/mm
N_data plotted:104
[click on plot for closeup]
Plot 3
data source:vimos_mask2ccd
(QC1 database)
dataset:yy
median:8.36957pix/mm
fixed thresholds:8.362...8.375pix/mm
N_data plotted:103
[click on plot for closeup]
Plot 4
data source:vimos_mask2ccd
(QC1 database)
dataset:yy
median:8.38805pix/mm
fixed thresholds:8.38...8.392pix/mm
N_data plotted:104
[click on plot for closeup]
Plot 5
data source:vimos_mask2ccd
(QC1 database)
dataset:xx
median:8.39327pix/mm
fixed thresholds:8.387...8.398pix/mm
N_data plotted:105
[click on plot for closeup]
Plot 6
data source:vimos_mask2ccd
(QC1 database)
dataset:xx
median:8.39246pix/mm
fixed thresholds:8.386...8.397pix/mm
N_data plotted:106
[click on plot for closeup]
Plot 7
data source:vimos_mask2ccd
(QC1 database)
dataset:yy
median:8.39173pix/mm
fixed thresholds:8.386...8.395pix/mm
N_data plotted:105
[click on plot for closeup]
Plot 8
data source:vimos_mask2ccd
(QC1 database)
dataset:yy
median:8.39145pix/mm
fixed thresholds:8.385...8.396pix/mm
N_data plotted:106
[click on plot for closeup]
This plot

Trending plots for monitoring the coefficients of the mask to CCD transformation.

The transformation is as follows:
X = a(xx)*x + a(xy)*y + x(0)
Y = a(yx)*x + a(yy)*y + y(0)
with (x,y) being mask coordinates in mm and (X,Y) CCD coordinates in pixel. X direction is along the slit orientation, y direction is perpendicular to the slits (i.e. in dispersion direction).

These trending plots show the time evolution of the matrix coefficients a(xx), a(xy), a(yx), and a(yy). The diagonal coefficients a(xx) and a(yy) give the scale factor between mask and CCD (near 8.4 pixel/mm). Variations are mainly cause by temperature changes, the empirical tolerance is around +/- 0.006 pixel/mm. The coefficients a(xy) and a(yx) give the rotation and should be near zero. The tolerance is +/- 0.005 pixel/mm around the empirical average. The procedure in case of violation of the thresholds is described on the SciOps Wiki pages.

Template ID: img_tec_MaskToCcd. Pipeline recipe: vmmasktoccd.  


General information

Click on any of the plots to see a close-up version. The latest date is indicated on top of the plot, data points belonging to that date are specially marked.

If configured,

  • statistical averages are indicated by a solid line, and thresholds by broken lines
  • outliers are marked by a red asterisk. They are defined as data points outside the threshold lines
  • "aliens" (= data points outside the plot Y limits) are marked by a red arrow ( or )
  • you can download the data for each parameter set if the 'Data downloads' link shows up