Plotted entries from OPSLOG files in VIRCAM report TWILRAWRANGE_Z_AVG, plot 2 (data set det_all):
(DATE changes at 21:00 UT or MJD-OBS = xxx.875)
DATE       	MJD-OBS		det_ID     	values
====================================================
2014-12-23	57015.000176	DET1.CHIP1	7549
2014-12-23	57015.000177	DET1.CHIP2	4719
2014-12-23	57015.000178	DET1.CHIP3	5280
2014-12-23	57015.000179	DET1.CHIP4	6145
2014-12-23	57015.000180	DET1.CHIP5	6539
2014-12-23	57015.000181	DET1.CHIP6	7340
2014-12-23	57015.000182	DET1.CHIP7	7442
2014-12-23	57015.000183	DET1.CHIP8	6105
2014-12-23	57015.000184	DET1.CHIP9	6239
2014-12-23	57015.000185	DET1.CHIP10	6496
2014-12-23	57015.000186	DET1.CHIP11	6006
2014-12-23	57015.000187	DET1.CHIP12	6579
2014-12-23	57015.000188	DET1.CHIP13	4503
2014-12-23	57015.000189	DET1.CHIP14	6352
2014-12-23	57015.000190	DET1.CHIP15	7324
2014-12-23	57015.000191	DET1.CHIP16	5824