Plotted entries from OPSLOG files in VIMOS report BIASRMS, plot 5, data set parQ3lo:

DATE       MJD-OBS      parameter values
==========================================================================
2008-11-19 54789.591453 1.51911653325656	parQ3lo
2008-11-20 54790.548764 1.54413030863519	parQ3lo
2008-11-21 54791.516456 1.53506139379969	parQ3lo