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retired:
FORS1 (April 2009)
ISAAC (December 2013)
MIDI (March 2015)
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VISIR trending system: HEALTH CHECK report
HELP USERS-GUIDE MORE
Last update: 2026-04-17T02:01:40 (UT)
  | now: 2026-04-17T10:32:44 (UT) muc03 QC pipeline: visir-4.4.3 (installed 2023-04-27)
same group: read-noise dark det-temp
General news: NOTE: The Health Check and calChecker services have been moved to qcFlow. These pages are only maintained for comparison and will be removed in 2026.
VISIR news:  
Report news:
DATE*: [?] 2026-04-10
report | NLT 		2026-04-11
report | NLT 		2026-04-12
report | NLT 		2026-04-13
report | NLT 		2026-04-14
report | NLT 		2026-04-15
report | NLT 		2026-04-16
report | NLT
r...
Raw CAL displays:
raw raw raw raw raw raw no CAL raw files
P...
CAL product quality:
products products products products products products no CAL products
 
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scores&comments | FULL | history ... | plot tutorial ... | contact | HC_docu... | quality events...                 daily/often; important to check     [?] 		*Date on this monitor changes at 21:00 UT
png: 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 8.68e+03 ADU VAL7800,9300 97 darkmed this | last_yr | all mean DARK level of the imaging detector
2 •QC1DB MEDIAN 8.61e+03 ADU VAL7800,9300 113 darkmed this | last_yr | all mean DARK level of the spectroscopic detector
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
scores: 14|
data source:visir_dark_img
(QC1 database)
dataset:darkmed•
median:8.68e+03ADU
fixed thresholds:7800...9300ADU
N_data plotted:97
[click plot for closeup]
Plot 2
scores: 8|
data source:visir_dark_spc
(QC1 database)
dataset:darkmed•
median:8.61e+03ADU
fixed thresholds:7800...9300ADU
N_data plotted:113
[click plot for closeup]
This plot

Trending plots show dark level of the imaging and spectroscopic detectors of VISIR.  

General information

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

The latest date is indicated on top of the plot.

If configured,

  • data points belonging to the latest date are specially marked
  • 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