Plotted entries from OPSLOG files in VIMOS report BIASLEV, plot 7, data set parQ3hi:

DATE       MJD-OBS      parameter values
==========================================================================
2008-09-03 54712.424784 208.	parQ3hi
2008-09-04 54713.510518 207.	parQ3hi
2008-09-05 54714.571529 209.	parQ3hi
2008-09-07 54716.563462 208.	parQ3hi