Plotted entries from OPSLOG files in CRIRES report DARKRON, plot 1 (data set med_par_ch1):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS		det_ID     	values
====================================================
2012-02-06	55964.350696	CHIP1.INT1	3.40874958534054
2012-02-07	55965.362876	CHIP1.INT1	3.41783435021856
2012-02-08	55966.361689	CHIP1.INT1	3.43579342996322
2012-02-10	55968.437095	CHIP1.INT1	3.42290489391574