Plotted entries from OPSLOG files in VISIR report SENS, plot 2 (data set sens_iP):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2012-02-02	55960.029852	5.60145923846085
2012-02-02	55960.039667	6.2338929960732
2012-02-02	55960.047120	5.81020736684424
2012-02-02	55960.054249	4.5733360551988
2012-02-02	55960.062166	6.93736281792451