Field Definitions are Available Here
Granule
string (4000)
The description of the browse url.
TBD
/AssociatedBrowseImageUrls/ProviderBrowseUrl/Description
/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:graphicOverview/gmd:MD_BrowseGraphic/gmd:fileDescription/gco:CharacterString
Identification Information (ECHO)