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Below is an example of the metadata fields in MODIS data displaying Science Quality information.
GROUP = MEASUREDPARAMETER

OBJECT = MEASUREDPARAMETERCONTAINER
CLASS = "1"

GROUP = QAFLAGS
CLASS = "1"

OBJECT = SCIENCEQUALITYFLAG
NUM_VAL = 1
VALUE = "Not Investigated"
CLASS = "1"
END_OBJECT = SCIENCEQUALITYFLAG

OBJECT = AUTOMATICQUALITYFLAGEXPLANATION
NUM_VAL = 1
CLASS = "1"
VALUE = "output file is created and good"
END_OBJECT = AUTOMATICQUALITYFLAGEXPLANATION

OBJECT = AUTOMATICQUALITYFLAG
NUM_VAL = 1
CLASS = "1"
VALUE = "Passed"
END_OBJECT = AUTOMATICQUALITYFLAG

OBJECT = OPERATIONALQUALITYFLAGEXPLANATION
NUM_VAL = 1
CLASS = "1"
VALUE = "Passed"
END_OBJECT = OPERATIONALQUALITYFLAGEXPLANATION

OBJECT = OPERATIONALQUALITYFLAG
NUM_VAL = 1
CLASS = "1"
VALUE = "Passed"
END_OBJECT = OPERATIONALQUALITYFLAG

OBJECT = SCIENCEQUALITYFLAGEXPLANATION
NUM_VAL = 1
VALUE = "See http://landdb1.nascom.nasa.gov/QA_WWW/release.cgi for the Science QA status of this product."
CLASS = "1"
END_OBJECT = SCIENCEQUALITYFLAGEXPLANATION

END_GROUP = QAFLAGS


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