Plotted entries from OPSLOG files in VIMOS report ZEROPOINTS_U, plot 1, data set parQ2:

DATE       MJD-OBS      parameter values
==========================================================================
2008-11-21 54791.003571 26.7406940662828	parQ2
2008-11-21 54791.346593 26.4798050129381	parQ2
2008-11-22 54792.000188 26.740022679564	parQ2