Plotted entries from OPSLOG files in VIMOS report IFUSTAB_HRo, plot 4, data set parQ4:

DATE       MJD-OBS      parameter values
==========================================================================
2008-11-19 54789.583793 189	parQ4
2008-11-20 54790.568157 187	parQ4
2008-11-21 54791.660053 187	parQ4
2008-11-22 54792.612165 187	parQ4