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Health Check monitor


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FORS1 trending system: History Plots
Last update: 2009-04-09T06:50:52 (UT)
| now: 2022-05-28T17:12:24 (UT)  
same group: dark linearity gain   conad fp_noise
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- png file - advanced studies: QC1 browser | QC1 plotter
Average ? Thresholds ? N_
method value unit method value
1 QC1DB no MEDIAN 0.53039 e-/ADU VAL0.485,0.565 18 conad this | last_yr | all chip 1, high gain
2 QC1DB no MEDIAN 0.57249 e-/ADU VAL0.53,0.61 18 conad this | last_yr | all chip 2, high gain
3 QC1DB no MEDIAN 2.21077 e-/ADU VAL2.1,2.35 18 conad this | last_yr | all chip 1, low gain
4 QC1DB no MEDIAN 2.37806 e-/ADU VAL2.25,2.5 18 conad this | last_yr | all chip 2, low gain
*Data sources: QC1DB: QC1 database; LOCAL: local text file | **OPS: to indicate that OPSLOG data are included
This plot

If the exposure time of the first two raw screen flat fields in the input set of frames is the same (within 4%), the difference frame is computed. Then the whole readout port is divided into a chessboard of 16x16 boxes. For each one of these boxes, the median signal level from the first raw frame is divided by the variance in the difference frame scaled by 2. The median value of the 16x16 values obtained is the accepted value for the conversion factor. CONAD QC parameters are trended per readout mode for the R_BESS filter only.  

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