FORS1 trending system: SCR_FF_U (HEALTH CHECK plot)

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	Health Check monitor

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[an error occurred while processing this directive] FORS1 trending system: HEALTH CHECK plot

Last update: 2007-02-15T14:24:50 (UT) | last data from: 2007-02-13 | latest files | availability

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Plot	Symbol [info]	Source*	Average [info]			Thresholds [info]		N_data	Data downloads	Remarks
Plot	Symbol [info]	Source*	method	value	unit	method	value	N_data	Data downloads	Remarks
1	•	`OPSLOG`	`none`		`mag`	`none`		`2`	n/a	efficiency of imaging screen flat (Paranal)
1	•	`QC1DB`	`MEDIAN`	`99.403`	`mag`	`3SIG`	`308.498`	`12`	this \| last_yr \| all	efficiency of imaging screen flat (Garching)

2	•	`OPSLOG`	`none`		`mag`	`none`		`2`	n/a	efficiency of imaging screen flat (Paranal)
2	•	`QC1DB`	`MEDIAN`	`78.620`	`mag`	`3SIG`	`240.222`	`11`	this \| last_yr \| all	efficiency of imaging screen flat (Garching)

3	•	`OPSLOG`	`none`		`mag`	`none`		`2`	n/a	efficiency of imaging screen flat (Paranal)
3	•	`QC1DB`	`MEDIAN`	`92.307`	`mag`	`3SIG`	`273.392`	`11`	this \| last_yr \| all	efficiency of imaging screen flat (Garching)

4	•	`OPSLOG`	`none`		`mag`	`none`		`2`	n/a	efficiency of imaging screen flat (Paranal)
4	•	`QC1DB`	`MEDIAN`	`80.988`	`mag`	`3SIG`	`249.011`	`11`	this \| last_yr \| all	efficiency of imaging screen flat (Garching)

*Data sources: OPSLOG: Paranal ops logs; QC1DB: QC1 database; LOCAL: local text file

This plot

The trended efficiency is the median raw signal devided by exposure time. The median value is computed within a window 250x150 pixel chosen close to the gap region between the 2 CCDs to minimize the illumination gradient. This is only a nominal 'efficiency' actually measuring the stability of exposure level (influenced by e.g. aging of lamps etc.).

General information

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

If applicable, the 20 latest values from Paranal ops logs are plotted as blue dots.

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

Health Check monitor