Additional Attributes

• Name: POLARIZATION STRING Description: Radar transmissions are polarized, with components normally termed vertical (V) and horizontal (H). Vertical means that the electric vector is in the plane of incidence; horizontal means the electric vector is perpendicular to the plane of incidence.

• Name: FLIGHT_LINE STRING Description: Flight line identifies where the aircraft/instrument has flown to acquire data.

• Name: BEAM_MODE STRING Description: The general type of active sensor used. Values indicate image resolution: such as standard, fine, wide, scansar wide, SM (strip mode), EW (extra wide). Or indicate resolution + polarization: FBS (fine beam single polarization), FBD (fine beam dual pol). Or atypically the type of product: TOPSAR (high resolution DEM), RPI (repeat pass interferometry), XTI (across track interferometry). Or resolution and product type IW (interferometric wide).

• Name: BEAM_MODE_DESC STRING Description: Text that describes the beam mode

• Name: BEAM_MODE_TYPE STRING Description: In most cases, the BEAM_MODE_TYPE value is the same as the BEAM_MODE attribute. Each platform has its own scheme for defining acquisition sensor beam modes. Beam modes often reflect a set configuration of polarization, resolution, and off-nadir pointing angle.

• Name: FARADAY_ROTATION STRING Description: An effect of the ionosphere that rotates polarizations from HH or VV or HV or VH. Significant for L or P band. Rotation over 5 degrees reduces usefulness for applications such as forest biomass. Effect is reduced at solar minimum.

• Name: INSAR_STACK_ID INT Description: An ASF-assigned unique number used internally to unify SAR images over the same location. Used for data that might be used for interferometry.

• Name: INSAR_STACK_SIZE INT Description: The number of SAR images over the same location in the entire ASF archive. Used for data that may be used for interferometry.

• Name: INSAR_BASELINE FLOAT Description: The perpendicular distance between two satellites when they took the related two images. Useful for identifying image pairs to use for interferometry.

• Name: DOPPLER FLOAT Description: The doppler centroid frequency - Useful for SAR processing and interferometry. Related to the squint of the satellite.

• Name: ASCENDING_DESCENDING STRING Description: Describes whether the satellite travel direction was ascending towards the north pole, or descending towards the south pole.

• Name: THUMBNAIL_URL STRING Description: URL that points to this granule's thumbnail image

• Name: CENTER_FRAME_ID STRING Description: ID of the center frame

• Name: PATH_NUMBER INT Description: The path describes a path the satellite will follow over the earth similar to longitude; each path has an assigned number. Combined with a frame number it identifies a specific piece of ground.

• Name: FRAME_NUMBER INT Description: The designated frame or scene as defined by various space agencies (ESA, JAXA, CSA) each of which have their own scheme. The frame describes a box over the Earth at a fixed latitude. Combined with a path number (for longitude it identifies a specific piece of ground).

• Name: CENTER_ESA_FRAME INT Description: The European Space Agency equivalent to the value in the FRAME_NUMBER field

• Name: MISSION_NAME STRING Description: The sitenames where AIRSAR, AIRMOSS, and UAVSAR acquisitions were taken.

• Name: GRANULE_TYPE STRING Description: Identifies the type of data by combining platform, beam mode type, and coverage (frame/swath)

• Name: PROCESSING_DATE STRING Description: The date the data was processed

• Name: PROCESSING_DESCRIPTION STRING Description: Describes what the data was processed to. For example: low resolution terrain corrected ALOS data.

• Name: LOOK_DIRECTION STRING Description: SAR imagery is taken with the sensor pointing either left or right of the satellite. Most data is right-looking.

• Name: PROCESSING_TYPE STRING Description: Indicates the type of product, such as browse, metadata, L1, complex, amplitude, projected, terrain corrected.

• Name: PROCESSING_LEVEL STRING Description: Indicates how much processing has been done to the data: L1, L1.0 unprocessed; L1.1 single look complex; L1, L1.5 amplitude image; L2, L2.2 terrain corrected image.

• Name: PROCESSING_TYPE_DISPLAY STRING Description: Label that will be displayed in ASF's Vertex interface

• Name: BYTES FLOAT Description: Product size in bytes.

• Name: MD5SUM STRING Description: Checksum

• Name: OFF_NADIR_ANGLE FLOAT Description: The angle the sensor points away from the satellite's nadir (off to the side). Larger angles correspond to imaging farther away from the satellite.

• Name: ACQUISITION_DATE STRING Description: Date the data was acquired by the satellite or aircraft and instrument.

• Name: CENTER_LON FLOAT Description: Longitude of the center of the scene or frame.

• Name: CENTER_LAT FLOAT Description: Latitude of the center of the scene or frame.

• Name: NEAR_START_LAT FLOAT Description: Latitude of the granule where imaging began nearest to the satellite. For an ascending satellite, it locates the lower left corner of a north-oriented image.

• Name: NEAR_START_LON FLOAT Description: Longitude of the granule where imaging began nearest the satellite. For an ascending satellite, it locates the lower left corner of a north-oriented image.

• Name: FAR_START_LAT FLOAT Description: Latitude of the granule where imaging began farthest from the satellite. For an ascending satellite, it locates the lower right corner of a north-oriented image.

• Name: FAR_START_LON FLOAT Description: Latitude of the granule where imaging began farthest from the satellite. For an ascending satellite, it locates the lower right corner of a north-oriented image.

• Name: NEAR_END_LAT FLOAT Description: Latitude of the granule where imaging ended nearest to the satellite. For an ascending satellite, it locates the upper left corner of a north-oriented image.

• Name: NEAR_END_LON FLOAT Description: Longitude of the granule where imaging ended nearest to the satellite. For an ascending satellite, it locates the upper left corner of a north-oriented image.

• Name: FAR_END_LAT FLOAT Description: Latitude of the granule where imaging ended farthest from the satellite. For an ascending satellite, it locates the upper right corner of a north-oriented image.

• Name: FAR_END_LON FLOAT Description: Longitude of the granule where imaging ended farthest from the satellite. For an ascending satellite, it locates the upper right corner of a north-oriented image.

• Name: ASF_PLATFORM STRING Description: Internal ASF platform name

• Name: GROUP_ID STRING Description: ID that helps ASF group products