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Description

The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Emissivity Dataset (GED) is a collection of monthly files (see known issues for gaps) for each year of global emissivity. The ASTER GED data products are generated for 2000 through 2015 using the ASTER Temperature Emissivity Separation (TES) algorithm atmospheric correction method. This algorithm method uses Moderate Resolution Imaging Spectroradiometer (MODIS) Atmospheric Profiles product MOD07 and the MODerate spectral resolution TRANsmittance (MODTRAN) 5.2 radiative transfer model along with the snow cover data from the standard monthly MODIS/Terra snow cover monthly global 0.05 degree product MOD10CM, and vegetation information from the MODIS monthly gridded NDVI product MOD13C2. ASTER GED Monthly V041 data products are offered in Hierarchical Data Format 5 (HDF5).

The National Aeronautics and Space Administration’s (NASA) Jet Propulsion Laboratory (JPL), California Institute of Technology, developed the ASTER GED product.

Known Issues

  • Since ASTER GED Monthly V041 uses MOD10CM as an input, there will be some months that were unable to be created due to missing data. Please see the MODIS/Terra Data Outages Webpage for more information.

Version Description

The following changes and improvements were implemented for the ASTER GED Version 4.1 data product: (1) Removal of the extraneous snow layer, (2) Optimized rows and columns for the data layers, and (3) Updated variable attributes in the metadata for bounding coordinates.

Product Summary

Platforms
Terra
Instruments
ASTER
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
5600 Meters x 5600 Meters
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
2000-03-01 to 2015-12-31
Temporal Resolution
1 Month
Data Partner
Land Processes Distributed Active Archive Center (LP DAAC) ,
ASTER, JET PROPULSION LABORATORY, NASA (NASA/JPL/ASTER)
Concept ID
C2763268461-LPCLOUD
Data State
COMPLETE
Number of Files/Granules
184
Processing Level
3
Published
Updated
Science Keywords
Emissivity ,
Land Surface Temperature ,
Terrain Elevation ,
Topographical Relief Maps ,
Normalized Difference Vegetation Index (NDVI) ,
Vegetation Index

Documents

Publications Citing This Dataset

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
Emissivity Band 10 (8.3 μm)Band 11 (8.6 μm)Band 12 (9.1 μm)Band 13 (10.6 μm)Band 14 (11.3 μm) N/A uint8 0 1 to 255 0.002
Emissivity Uncertainty Band 10 (8.3 μm)Band 11 (8.6 μm)Band 12 (9.1 μm)Band 13 (10.6 μm)Band 14 (11.3 μm) N/A uint8 0 1 to 255 0.002
NDVI Normalized Difference Vegetation Index N/A uint16 0 0 to 65535 0.001
QFlag Quality Flag N/A uint8 N/A 0 to 255 N/A
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