Plotted entries from OPSLOG files in UVES report BIAS_BLUE_2x2_50kHz, plot 4 (data set struct_row_P):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2011-11-17	55883.381826	0.3138
2011-11-18	55884.368801	0.3185
2011-11-19	55885.394262	0.3051
2011-11-20	55886.382906	0.2999
2011-11-21	55887.387797	0.3098
2011-11-22	55888.410527	0.3099
2011-11-23	55889.304613	0.306
2011-11-24	55890.304561	0.3147
2011-11-25	55891.381511	0.3081
2011-11-26	55892.384070	0.3086
2011-11-27	55893.407019	0.313
2011-11-28	55894.388346	0.3123
2011-11-29	55895.302919	0.2999