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

DATE       MJD-OBS      parameter values
==========================================================================
2008-11-19 54789.583793 0.258602865848129	parQ4
2008-11-20 54790.568157 0.305512382461182	parQ4
2008-11-21 54791.660053 0.303942513055902	parQ4
2008-11-22 54792.612165 0.264837037561867	parQ4