Field Definitions are Available Here
Collection
string (1030)
Specifies a unique name for the collection. This is considered the primary identifier for a collection.
ADVANCED MICROWAVE SOUNDING UNIT-A (AMSU-A) SWATH FROM NOAA-16 V1
/DataSetId
/gmi:MI_Metadata/gmd:fileIdentifier/gco:CharacterString
Identification Information (ECHO)