Plotted entries from OPSLOG files in ISAAC report OPTDIST_SLK, plot 6 (data set p_F_A):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2013-10-21	56587.625344810000000	-9.2750868095377e-06

Plotted entries from OPSLOG files in ISAAC report OPTDIST_SLK, plot 6 (data set p_F_X):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2013-10-21	56587.625344810000000	-9.66811203020831e-06