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CRIRES trending system: HISTORY plot
Last update: 2009-01-11T04:47:09 (UT)
same group: darkmed ron_raw
close window history: 2007   2008   2009   2010 2011 2012 2013 2014   HEALTH FULL
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*Date on this monitor changes at 21:00 UT
Print: Information and research:
- png file - advanced studies: QC1 browser | QC1 plotter
Plot
?		 Symb
?		 Source
*		 Average ? Thresholds ? N_
data		 QC1
parameter		 Data
downloads		 Remarks
method value unit method value
1 •QC1DB MEDIAN 3.44745 ADU VAL3.3,3.65 74 ron23 this | last_yr | all RON, chip 1, DIT=1
2 •QC1DB MEDIAN 3.51925 ADU VAL3.4,4.4 74 ron23 this | last_yr | all RON, chip 2, DIT=1
3 •QC1DB MEDIAN 3.62563 ADU VAL3.57,3.75 74 ron23 this | last_yr | all RON, chip 3, DIT=1
4 •QC1DB MEDIAN 4.01578 ADU VAL3.9,4.6 74 ron23 this | last_yr | all RON, chip 4, DIT=1
5 •QC1DB MEDIAN 1.6971 ADU VAL1.5,2.0 85 ron23 this | last_yr | all RON, chip 1, DIT=300
6 •QC1DB MEDIAN 1.97673 ADU VAL1.75,2.3 85 ron23 this | last_yr | all RON, chip 2, DIT=300
7 •QC1DB MEDIAN 2.10793 ADU VAL1.85,2.4 85 ron23 this | last_yr | all RON, chip 3, DIT=300
8 •QC1DB MEDIAN 2.20434 ADU VAL1.7,2.5 85 ron23 this | last_yr | all RON, chip 4, DIT=300
*Data sources: QC1DB: QC1 database; LOCAL: local text file
This plot

Trending plot for CRIRES RON as determined from DARK exposures.

The read-out noise is measured from the difference of the 3rd and 2nd dark image using the following procedure:
- generate 100 13x13 pixel windows
- compute the pixel standard deviation in each window
- the read-out noise is the median of these measurements multiplied with sqrt(NDIT/2).

The trending shows RON from DIT=1sec and DIT=300sec exposures for all four chips.  

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