ISAAC trending system: HISTORY plot
Last update: 2007-05-22T09:45:23 (UT)
same group: SW_FPN LW_DH_FPN LW_DL_FPN LW_UH_FPN SW_STD LW_DH_STD LW_DL_STD LW_UH_STD
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*Date on this monitor changes at 21:00 UT
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Plot Symbol
[info]		 Source* Average [info] Thresholds [info] N_data Data downloads Remarks
method value unit method value
1 •QC1DB none  ADU none   92 this | last_yr | all structural (fixed pattern) noise for UncorrHighBias DIT=0.11 in upper left (UL) quadrant.
2 •QC1DB none  ADU none   92 this | last_yr | all like Fig.1, upper right (UR) quadrant, DIT=0.11
5 •QC1DB none  ADU none   92 this | last_yr | all like Fig.1, lower left (LL) quadrant, DIT=0.11
6 •QC1DB none  ADU none   92 this | last_yr | all like Fig.1, lower right (LR) quadrant, DIT=0.11
*Data sources: OPSLOG: Paranal ops logs; QC1DB: QC1 database; LOCAL: local text file
This plot

This is the trending plot for the ISAAC Aladdin structural noise (fixed pattern noise) QC parameters derived from DARK frames.

QC parameter are derived from post-pipeline Quality Control processes in Garching, hence there are no values from Paranal to be included.

Method: fit the histogram of the MASTER_DARK product by a Gaussian and use the width.

These plots describe:
1. FPN mode = UncorrHighBias, DIT=0.11sec, quadrant = upper left (UL),
2. FPN As Fig.1, but for UR quadrant
5. FPN As Fig.1 but for LL quadrant
6. FPN As Fig.1 but for LR quadrant

Find more information about ISAAC DARK frames here.

Other QC parameters related to detector properties (like read noise, linearity) are trended.  

General information

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