ASTER User's Guide - NASA

ASTER Users Handbookgroups with a number of specific attributes in each of them. These groups and the attributes arelisted below: See further below for details on each of them.• Attribute 1: HDFEOS Version• Attribute 2: StructMetadata.0• Attribute 3: ProductMetadata.0• Attribute 4: ProductMetadata.1• Attribute 5: ProductMetadata.v• Attribute 6: ProductMetadata.s• Attribute 7: ProductMetadata.t• Attribute 8: CoreMetadata.0What is an ECS metadata (.met) file and how can I access it?The ECS metadata file is the external .met file that is delivered to the user along with the Level-1dataset. We have chosen to call it “ECS metadata” only for convenience and to discriminate itfrom the embedded HDF metadata file. It is written in ODL (Object Description Language), anASCII-based “parameter = value” format, and contains a number of attributes relating to theLevel-1 dataset. The .met file provides a subset of the hdf metadata. It contains 3 broad groupsof information: INVENTORYMETADATA, COLLECTIONMETADATA, andARCHIVEMETADATA.What is the difference between the HDF & ECS metadata files?There are both similarities and differences between the HDF & ECS metadata files. The HDFmetadata that is generated when the Level-1 data is produced in GDS, Japan is written as part ofthe HDF file. It contains 8 attribute groups with a number of specific attributes in each of them.These groups and the attributes contained in them are broadly summarized below. The referenceto ASTER Level-1A and 1B in brackets indicate at which level of the data set’s HDF metadata,the information is present:Attribute # 1: HDFEOS VersionHDFEOS_V2.6 (ASTER Level-1A & 1B)Attribute #2: StructMetadata.0SwathStructureVNIR_Bands 1 through 3B (ASTER Level-1A)VNIR_Swath (ASTER Level-1B)SWIR Bands 4 through 9 (ASTER Level-1A)SWIR_Swath (ASTER Level-1B)TIR Bands 10 through 14 (ASTER Level-1ATIR_Swath (ASTER Level-1B)Dimension (ASTER Level-1A & 1B)GeoTrackGeoXTrackImageLine71