NOTE: The Health Check and calChecker services are moved to qcFlow on an instrument by instrument basis. The current pages will not be updated any longer once the move has been finished.
The fixed-pattern noise is computed in the following way: The
difference of two 100x100 sub-frames of the same master flat field
image is determined. These two sub-frames are are shifted with respect
to each other by 10 pixels in X- and Y-direction. The population
standard deviation of the difference frame, divided by the square root
of 2, minus the photon noise (geometrically subtracted) yields the
fixed-pattern noise, which is then divided by the median of the
respective region.
More information can be found on
the plot tutorial page
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
mirror sites:
PL (internal
link) HQ
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