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GRAVITY trending system: HEALTH CHECK report
HELP USERS-GUIDE MORE
Last update: 2026-04-16T18:38:57 (UT)
  | now: 2026-04-17T16:25:53 (UT) muc05 QC pipeline: gravity-1.5.4 (installed 2022-03-24)
same group: AT_SC_low AT_SC_med AT_SC_high AT_FT   UT_SC_low UT_SC_med UT_SC_high UT_FT
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.
GRAVITY 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
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scores&comments | history ... | plot tutorial ... | contact | HC_docu... | quality events...               [?] 		*Date on this monitor changes at 21:00 UT
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Plot
?		 Symb
?		 Source
*		 Average ? Thresholds ? N_
data		 QC1
parameter		 Data
downloads		 Remarks
method value unit method value
1 •QC1DB MEDIAN -0.175 degrees none  170 t3_phi_ft123_p1 this | last_yr | all closure phase, telescopes 123 (=AT432), SPLIT polarisation, FT
2 •QC1DB MEDIAN 0.408 degrees none  170 t3_phi_ft124_p1 this | last_yr | all closure phase, telescopes 124 (=AT431), SPLIT polarisation, FT
3 •QC1DB MEDIAN 0.532 degrees none  170 t3_phi_ft134_p1 this | last_yr | all closure phase, telescopes 134 (=AT421), SPLIT polarisation, FT
4 •QC1DB MEDIAN -0.00999 degrees none  170 t3_phi_ft234_p1 this | last_yr | all closure phase, telescopes 234 (=AT321), SPLIT polarisation, FT
5 •QC1DB MEDIAN -0.338 degrees none  293 t3_phi_ft123_p1 this | last_yr | all closure phase, telescopes 123 (=AT432), COMBINED polarisation, FT
6 •QC1DB MEDIAN 0.839 degrees none  293 t3_phi_ft124_p1 this | last_yr | all closure phase, telescopes 124 (=AT431), COMBINED polarisation, FT
7 •QC1DB MEDIAN 1.73 degrees none  293 t3_phi_ft134_p1 this | last_yr | all closure phase, telescopes 134 (=AT421), COMBINED polarisation, FT
8 •QC1DB MEDIAN 0.471 degrees none  293 t3_phi_ft234_p1 this | last_yr | all closure phase, telescopes 234 (=AT321), COMBINED polarisation, FT
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft123_p1•
median:-0.175degrees
thresholds:none 
N_data plotted:170
[click plot for closeup]
Plot 2
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft124_p1•
median:0.408degrees
thresholds:none 
N_data plotted:170
[click plot for closeup]
Plot 3
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft134_p1•
median:0.532degrees
thresholds:none 
N_data plotted:170
[click plot for closeup]
Plot 4
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft234_p1•
median:-0.00999degrees
thresholds:none 
N_data plotted:170
[click plot for closeup]
Plot 5
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft123_p1•
median:-0.338degrees
thresholds:none 
N_data plotted:293
[click plot for closeup]
Plot 6
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft124_p1•
median:0.839degrees
thresholds:none 
N_data plotted:293
[click plot for closeup]
Plot 7
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft134_p1•
median:1.73degrees
thresholds:none 
N_data plotted:293
[click plot for closeup]
Plot 8
scores: not implemented
data source:gravity_vis
(QC1 database)
dataset:t3_phi_ft234_p1•
median:0.471degrees
thresholds:none 
N_data plotted:293
[click plot for closeup]
This plot

Closure phase T3 phi from night-time calibrator measurements for the 4 telescope triangles and for FT and SC, respectively.  

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