This file describes the values of the DATA_QUALITY_ID keyword in the SOIR
data labels.
(written by E. NEEFS)

DATA_QUALITY_ID is a 7 bit binary code. Each digit in the code can be set to
0 or to 1.

The respective bits put to 1 have the following meaning :

1000000 : full sun referencing OK
0100000 : wavenumber calibration OK
0010000 : detector non linearity correction OK
0001000 : no suspicion of refraction uncertainty
0000100 : no suspicion of pointing unstability
0000010 : no suspicion of stray light
0000001 : bad pixel correction OK

For PSA level 1B data sets the first 3 digits of DATA_QUALITY_ID will always
be 0 : 000XXXX

For correctly constructed PSA level 2 data sets the first 3 digits of
DATA_QUALITY_ID will be 1 : 111XXXX

The last 4 digits of DATA_QUALITY_ID will be manually added after evaluation
by the experimenter.