Plotted entries from OPSLOG files in MIDI report DETRON, plot 1 (data set RON_median_ops):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2012-02-07	55965.341968	12.243052
2012-02-08	55966.339144	10.64654
2012-02-09	55967.345313	12.714459