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NACO trending system: HISTORY report
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Last update: 2019-03-28T13:37:26 (UT)
same group: DETMON_COUNTS_ DETMON_LIN_ DETMON_GAIN DETMON_FPN_   hot/cold_pixels LampFlat_gain LampFlat_FPN
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*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 none   ratio none  83 fpn_norm this | last_yr | all fpn ratio, for any Filter, S13, Double_RdRstRd (and DIT=15sec)
1 QC1DB none   ratio none  15 fpn_norm this | last_yr | all fpn ratio, for J, S13, Double_RdRstRd (and DIT=15sec)
1 QC1DB none   ratio none  20 fpn_norm this | last_yr | all fpn ratio, for H, S13, Double_RdRstRd (and DIT=15sec)
1 QC1DB none   ratio none  26 fpn_norm this | last_yr | all fpn ratio, for Ks, S13, Double_RdRstRd (and DIT=15sec)
2 QC1DB none   ratio none  18 fpn_norm this | last_yr | all fpn ratio, for any Filter, S13, FowlerNsamp (and DIT=15sec)
2 QC1DB none   ratio none  0 fpn_norm this | last_yr | all fpn ratio, for J, S13, FowlerNsamp (and DIT=15sec)
2 QC1DB none   ratio none  0 fpn_norm this | last_yr | all fpn ratio, for H, S13, FowlerNsamp (and DIT=15sec)
2 QC1DB none   ratio none  0 fpn_norm this | last_yr | all fpn ratio, for Ks, S13, FowlerNsamp (and DIT=15sec)
*Data sources: QC1DB: QC1 database; LOCAL: local data source
Plot 1
data source:naco_lampflat
(QC1 database)
dataset:
(numbers below apply to this dataset)
fpn_norm
average:none
thresholds:none
N_data plotted:83
[click plot for closeup]
Plot 2
data source:naco_lampflat
(QC1 database)
dataset:
(numbers below apply to this dataset)
fpn_norm
average:none
thresholds:none
N_data plotted:18
[click plot for closeup]
This plot

Normalized fixed pattern noise.

Fixed pattern noise (fpn QC1 parameter) divided by the flat counts (flat_med_max QC1 parameter) in order to obtain a structural noise (fpn_norm QC1 parameter) value independent on the lamp flat counts. The data points are separated according to read mode:

  • Double_RdRstRd HighDensity, DIT=15sec, S13, J, H or Ks filter
  • FowlerNsamp HighSensitivity, DIT=15sec, S13, J, H or Ks filter

Plot will be maintained as a fallback solution for the unreliable fp noise values currently derived from the detmon data.

The fractional fixed pattern noise in fowler sampling mode is dominated by the diagonal stripe shaped light contamination.  


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