This is the Health Check plot for the 
quality of the dispersion solution in the GIRAFFE
arclamp calibration data. We display here the QC1 parameter nlin_acc
which describes the average number of lines per fibre accepted for
the dispersion
solution. This plot monitors the 
HC data taken in high resolution (H525.8B) and low resolution (L543.1, Medusa1
and 2 only).</font><p><font size="2">
The  ops log data contain only the parameter PRO.WSOL.NLINES which measures
the nominal number of lines per fibre, before acceptance. This value is
usually slightly higher than nlin_acc.
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The purpose of this plot is to monitor the ability of the pipeline to derive a
reasonable
wavelength solution.
Plots 1-5 show the HC settings for high resolution. Plots 6-7 show the HC
settings for the low resolution grating. Plots 8-10 show <b>all</b> settings
per wavelength: Medusa1/2 high-resolution (8), IFU1/2/Argus high-resolution
(9), and Medusa1/2 low resolution (10).

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Check the RMS plot of this group for the typical rms of the
dispersion solution, and the RESOL plot for monitoring the resolution.