Health Check monitor


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HealthCheck Monitor
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FORS2:
detector: bias
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FORS2 trending system: HEALTH CHECK plot
Last update: 2008-10-11T11:13:31 (UT)
now: 2008-10-12T01:28:05 (UT)
INFO USERS-GUIDE MORE
same group: med_master ron_raw ron_master fp_raw struct_raw
history ... | plot tutorial ...   daily/often; important to check     [info]
last OPSLOG data:
2008-10-10
Plot: 1 2 3 4   latest_files
N_data: number of recent OPSLOG entries plotted here
N_data: 13 13 12 12 availability
Print: Information and research: News:
- png file - advanced studies: QC1 browser | QC1 plotter
 
Plot
[info]
Symbol
[info]
Source* OPS?** Average [info] Thresholds [info] N_data Data downloads Remarks
method value unit method value
1 QC1DB yes (13) MEDIAN 0.40000 ADU 3SIG± 1.00836 9 this | last_yr | all 100Kps/2ports/high_gain (Garching; only non-zero values are shown)
2 QC1DB yes (13) MEDIAN 0.45000 ADU 3SIG± 0.98804 12 this | last_yr | all 100Kps/2ports/high_gain (Garching; only non-zero values are shown)
3 QC1DB yes (12) MEDIAN 0.19000 ADU 3SIG± 0.27964 53 this | last_yr | all 200Kps/2ports/low_gain (Garching; only non-zero values are shown)
4 QC1DB yes (12) MEDIAN 0.28000 ADU 3SIG± 0.35768 56 this | last_yr | all 200Kps/2ports/low_gain (Garching; only non-zero values are shown)
*Data sources: QC1DB: QC1 database; LOCAL: local text file | **OPS: to indicate if OPSLOG data are included
This plot

The difference between the first raw bias and the second raw bias (in ADU) shifted by 10x10 pixels, is computed. This is the combination of fixed pattern noise and read out noise (scaled by sqrt(2)). The population standard deviation of this difference is computed and divided by the square root of 2. The read out noise contribution evaluated as QC OUTi RON is then quadratically subtracted from the total noise.  


General information

Click on any of the plots to see a close-up version.

If applicable, the latest values from Paranal ops logs are plotted as blue dots. More information about those values, including a download option, is available in the OPSLOG section on top of the page.

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