Plotted entries from OPSLOG files in CRIRES report DARKMED, plot 8 (data set med_par_ch8):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS		det_ID     	values
====================================================
2013-05-12	56425.567953430000000	CHIP4.INT1	4.68939402699471
2013-05-13	56426.440796700000000	CHIP4.INT1	8.0732323328654
2013-05-14	56427.438374520000000	CHIP4.INT1	14.6868686676025
2013-05-15	56428.451996040000000	CHIP4.INT1	7.58585866292318
2013-05-16	56429.362675440000000	CHIP4.INT1	10.8989898363749
2013-05-17	56430.032178340000000	CHIP4.INT1	12.1111113230387
2013-05-17	56430.368332830000000	CHIP4.INT1	12.6186869939168