Plotted entries from OPSLOG files in VIMOS report BIASRMS, plot 1, data set parQ2lo:

DATE       MJD-OBS      parameter values
==========================================================================
2008-11-19 54789.591453 1.24636277242293	parQ2lo
2008-11-20 54790.548764 1.23843400882424	parQ2lo
2008-11-21 54791.516456 1.18234855827877	parQ2lo