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 – 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 NDVI product MOD13C2.
The National Aeronautics and Space Administration’s (NASA) Jet Propulsion Laboratory (JPL), California Institute of Technology, developed the ASTER GED product.
Improvements/Changes from Previous Versions
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.
Citation
PI Name: Glynn Hulley, Simon Hook
DOI: 10.5067/Community/ASTER_GED/AG5KMMON.004
Characteristic | Description |
---|---|
Temporal Granularity | Monthly |
Temporal Extent | 2000 - 2015 |
Spatial Extent | Global |
File Size | ~457 MB |
Coordinate System | Geographic Latitude and Longitude |
Datum | WGS84 |
File Format | NetCDF4 |
Geographic Dimensions | Entire Globe |
Characteristic | Description |
---|---|
Number of Science Dataset (SDS) Layers | 12 |
Columns/Rows | 7200 x 3600 |
Pixel Size | 5600 m |
SDS Name | Description | Units | Data Type | Fill Value | Valid Range | Scale Factor |
---|---|---|---|---|---|---|
emis10 |
Band 10 Emissivity - 8.3 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis11 |
Band 11 Emissivity - 8.6 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis12 |
Band 12 Emissivity - 9.1 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis13 |
Band 13 Emissivity - 10.6 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis14 |
Band 14 Emissivity - 11.3 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis10_err |
Band 10 Emissivity Uncertainty - 8.3 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis11_err |
Band 11 Emissivity Uncertainty - 8.6 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis12_err |
Band 12 Emissivity Uncertainty - 9.1 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis13_err |
Band 13 Emissivity Uncertainty - 10.6 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
emis14_err |
Band 14 Emissivity Uncertainty - 11.3 μm |
N/A | 8-bit unsigned integer |
0 |
1 to 255 |
0.002 |
NDVI |
MODIS (MOD13C2) Normalized Difference Vegetation Index |
N/A | 16-bit unsigned integer |
0 |
0 to 65535 |
0.001 |
QFlag |
Quality Flag: |
N/A | 8-bit unsigned integer |
N/A |
0 to 255 |
N/A |
ASTER GED Monthly V004 User Guide (NetCDF)
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.
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