Trending plot for the RMS of the dispersion solution. The wavelength solution
is achieved by calibrating the Fabry-Perot (FP) lines with Th-Ar arc lines.</font><p><font size="2">

The dispersion RMS is calculated per order. The trending plots show the
average dispersion RMS of all orders and the RMS of the individual values.

<!-- The dispersion RMS is calculated per order. The trending plots show the
average dispersion RMS of all orders, the RMS of the individual values, and the values for two
dedicated orders (order number 45 (on BLUE chip) and order 130 (RED chip). The
plots come separately for fibre A and B. -->