Plotted entries from OPSLOG files in CRIRES report WAVETHAR, plot 2 (data set plt_par_ch3):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2012-02-05	55963.448435	1090.4532887742
2012-02-06	55964.365666	1090.45733470968
2012-02-07	55965.377889	1090.45359070968
2012-02-08	55966.376633	1090.45226219355
2012-02-09	55967.864803	1090.45600619355