Plotted entries from OPSLOG files in UVES report ECH_RESOLUTION_DHC, plot 1 (data set psR437B_P):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS      	values
====================================================
2012-01-30	55957.340180	81745.3607
2012-01-31	55958.264925	81980.1107
2012-02-01	55959.419127	81785.0235
2012-02-02	55960.441575	81592.7317
2012-02-03	55961.439107	81586.0233
2012-02-04	55962.430927	81665.5867
2012-02-05	55963.458906	81462.5169
2012-02-06	55964.379135	81575.3208
2012-02-07	55965.379295	81928.7965
2012-02-08	55966.374558	81771.935
2012-02-09	55967.383488	81412.7826