This is the trending plot monitoring the stability of the GIRAFFE high-resolution and low-resolution grating.
It measures the thermal and non-thermal drifts of the gratings.
 These data are derived from the daily SIMLAMP,TAL health check measurements
(HR grating: H525.8B setting; LR grating: L543.1).</font><p><font size="2">

<b>Panel 1 (plots 1-3)</b>, top to bottom:<br>
<ul>
<li>plot 1: temperature T53 <br>
<li>plot 2: Medusa1, differential drift DX (in pix) against a reference frame, HR
grating <br>
<li>plot 3: same, for LR grating.
</ul>

<b> Panel 2 (plots 4-6).</b> Same as panel 1, for shifts in Y direction. The
T53 plot is repeated.</font><p><font size="2">

<b> Plots 7,8</b>: Correlation plots DT vs. DX.
The thermal drifts show up as diagonal clustering (upper left to lower right).
Any systematic deviation is due to a non-thermal effect.</font><p><font size="2">

<b> Plots 9,10</b>: same for DT vs. DY.</font><p><font size="2">

Find more information <a href="/qc/GIRAFFE/qc/fmt_qc1.html">here</a>. </p>