LET Behind Level 1 Calibration database.
For each row:
	The timestamp in column 1 is the END of the period
	for which the calibration file in column 2 is valid.
BEGIN
2006-11-16T23:39:24.875	LET_Level1_factors_behind_000.txt
2006-11-17T21:44:13.125	LET_Level1_factors_behind_002.txt
2006-12-29T16:54:00.000	LET_Level1_factors_behind_000.txt
2037-01-01T00:00:00.000	LET_Level1_factors_behind_001.txt
ENDENDENDENDENDENDENDEN	ENDENDENDENDENDENDENDENDENDENDEND