User Guide
Algorithm Theoretical Basis Document (ATBD)
ASTER Science Team (JPL) Website
Joint Emissivity Database Initiative (JEDI) Web Page
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 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 Normalized Difference Vegetation Index (NDVI) product MOD13C2.
The National Aeronautics and Space Administration’s (NASA) Jet Propulsion Laboratory (JPL), California Institute of Technology, developed the ASTER GED product.
This V004 product incorporates an emissivity adjustment to the ASTER GED V003 product. See “The ASTER Global Emissivity Dataset (ASTER GED): Mapping Earth’s emissivity at 100 meter spatial scale” publication Section 4 for more information.
Characteristic | Description |
---|---|
Collection | ASTER GED |
DOI | 10.5067/Community/ASTER_GED/AG5KMMOH.004 |
File Size | ~20 GB |
Temporal Resolution | Monthly |
Temporal Extent | 2000-03-01 to 2015-12-31 |
Spatial Extent | Global |
Coordinate System | Geographic Latitude and Longitude |
Datum | World Geodetic System (WGS84) |
File Format | HDF5 |
Geographic Dimensions | Global |
Characteristic | Description |
---|---|
Number of Science Dataset (SDS) Layers | 4 |
Columns/Rows | 7200 x 3600 |
Pixel Size | 5600 m |
SDS Name | Description | Units | Data Type | Fill Value | No Data Value | Valid Range | Scale Factor |
---|---|---|---|---|---|---|---|
Emissivity | Band 10 - 8.3 μmBand 11 - 8.6 μmBand 12 - 9.1 μmBand 13 - 10.6 μmBand 14 - 11.3 μm | N/A | 8-bit unsigned integer | 0 | N/A | 1 to 255 | 0.002 |
Emissivity Uncertainty | Band 10 - 8.3 μmBand 11 - 8.6 μmBand 12 - 9.1 μmBand 13 - 10.6 μmBand 14 - 11.3 μm | N/A | 8-bit unsigned integer | 0 | N/A | 1 to 255 | 0.002 |
NDVI | Normalized Difference Vegetation Index | N/A | 16-bit unsigned integer | 0 | N/A | 0 to 65535 | 0.001 |
QFlag | Quality Flag | N/A | 8-bit unsigned integer | N/A | N/A | 0 to 255 | N/A |
Value | Description |
---|---|
0 | Land |
1 | Filled Value |
2 | Ocean |
Since ASTER GED Monthly V004 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.