Plotted entries from OPSLOG files in GIRAFFE report ARCLAMP, plot 7 (data set MED2L_HC):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2012-05-18	56066.702633	11.996389649037
2012-05-22	56070.648719	10.9690401391549