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VISIR trending system: HISTORY plot
Last update: 2009-01-30T11:04:29 (UT)
same group: read-noise dark flat-flux nbadpix det-temp
close window history: 2006   2007   2008 2009 2010 2011 2012 2013 2014 2015   HEALTH
  ... ... ... ... ... ... ... ...
*Date on this monitor changes at 21:00 UT
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Plot
?		 Symb
?		 Source
*		 Average ? Thresholds ? N_
data		 QC1
parameter		 Data
downloads		 Remarks
method value unit method value
1 •QC1DB MEAN     3SIG± 0.0 0 ron1 this | last_yr | all read-out-noise of the imaging detector
2 •QC1DB MEAN     3SIG± 0.0 0 ron1 this | last_yr | all read-out-noise of the spectroscopic detector
*Data sources: QC1DB: QC1 database; LOCAL: local text file
This plot

This is a trending plot monitoring the read-out-noise (RON) measured from the raw(2)-raw(1) difference frames. It is displayed for both, the imaging and spectroscopic detectors. The RON data points for the spectroscopic detector include those taken in MR (values around 230) and in HRS (values around 520, December 2007).  

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