Plotted entries from OPSLOG files in CRIRES report DARKMED, plot 1 (data set med_par_ch1):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       MJD-OBS      det_ID     values
====================================================
2010-03-15 55271.428388 CHIP1.INT1 1
2010-03-16 55272.433000 CHIP1.INT1 0.75
2010-03-17 55273.426930 CHIP1.INT1 0.8333333333
2010-03-20 55276.440484 CHIP1.INT1 0.8333333333