AG5KMMON v004

ASTER Global Emissivity Dataset, Monthly, 0.05 degree, NetCDF4


PI: Glynn Hulley, Simon Hook

Documentation

Using the Data

Citation

Related Products

The AG5KMMON.004 data product was decommissioned as of December 14, 2016. Users are encouraged to use Version 4.1 of ASTER Global Emissivity Dataset, Monthly, 0.05 degree, HDF5 (AG5KMMOH.041).

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 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.

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Characteristics

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.

Collection and Granule

Collection

Characteristic Description
CollectionASTER GED
DOI10.5067/Community/ASTER_GED/AG5KMMON.004
File Size~457 MB
Temporal ResolutionMonthly
Temporal Extent2000-03-01 to 2015-12-31
Spatial ExtentGlobal
Coordinate SystemGeographic Latitude and Longitude
DatumWorld Geodetic System (WGS84)
File FormatNetCDF4
Geographic DimensionsGlobal

Granule

Characteristic Description
Number of Science Dataset (SDS) Layers12
Columns/Rows7200 x 3600
Pixel Size5600 m

Layers

SDS Name Description Units Data Type Fill Value No Data Value Valid Range Scale Factor
emis10 Band 10 Emissivity - 8.3 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis11 Band 11 Emissivity - 8.6 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis12 Band 12 Emissivity - 9.1 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis13 Band 13 Emissivity - 10.6 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis14 Band 14 Emissivity - 11.3 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis10_err Band 10 Emissivity Uncertainty - 8.3 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis11_err Band 11 Emissivity Uncertainty - 8.6 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis12_err Band 12 Emissivity Uncertainty - 9.1 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis13_err Band 13 Emissivity Uncertainty - 10.6 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
emis14_err Band 14 Emissivity Uncertainty - 11.3 μm N/A 8-bit unsigned integer 0 N/A 1 to 255 0.002
NDVI MODIS (MOD13C2) 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

Quality Flag Values

Value Description
0 Land
1 Filled Value
2 Ocean

Product Quality

ASTER GED Monthly V004 User Guide (NetCDF)

Known Issues

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.


Documentation

User Guide
Algorithm Theoretical Basis Document (ATBD)
ASTER Science Team (JPL) Website
Joint Emissivity Database Initiative (JEDI) Web Page

Using the Data

E-Learning

Data Citation Tips from NASA’s Land Processes DAAC

Publications

View research publications that used these data

Earthdata Forum

Join the data discussion over on the Earthdata Forum.

Access Data

Tool Functionality Description Download Data

Citation

DOI: 10.5067/Community/ASTER_GED/AG5KMMON.004

When using this data product in a publication, please include the following citations in addition to the data product citation provided above:

Hulley, G.C., Hook, S.J., Abbott, E., Malakar, N., Islam, T., and Abrams, M., 2015, The ASTER Global Emissivity Dataset (ASTER GED)—Mapping Earth’s emissivity at 100 meter spatial scale: Geophysical Research Letters, accessed October 22, 2015, at https://doi.org/10.1002/2015GL065564.

Hulley, G.C., Hughes, C.G., and Hook, S.J., 2012, Quantifying uncertainties in land surface temperature and emissivity retrievals from ASTER and MODIS thermal infrared data: Journal of Geophysical Research D - Atmospheres, v. 117, no. 23, D23113, at https://doi.org/10.1029/2012JD018506.

Hulley, G.C., and Hook, S.J., 2011, Generating consistent land surface temperature and emissivity products between ASTER and MODIS data for earth science research: IEEE Transactions on Geoscience and Remote Sensing, v. 49, no. 4, p. 1304-1315, at https://doi.org/10.1109/TGRS.2010.2063034.

Hulley, G.C., and Hook, S.J., 2009, The North American ASTER Land Surface Emissivity Database (NAALSED) version 2.0: Remote Sensing of Environment, v. 113, no. 9, p. 1967-1975, at https://doi.org/10.1016/j.rse.2009.05.005.

Hulley, G.C., Hook, S.J., and Baldridge, A.M., 2009, Validation of the North American ASTER Land Surface Emissivity Database (NAALSED) version 2.0 using pseudo-invariant sand dune sites: Remote Sensing of Environment, v. 113, no. 10, p. 2224-2233, at https://doi.org/10.1016/j.rse.2009.06.005.

Hulley, G.C., and Hook, S.J., 2008, A new methodology for cloud detection and classification with ASTER data: Geophysical Research Letters, v. 35, no. 16, L16812, at https://doi.org/10.1029/2008GL034644.

Hulley, G.C., Hook, S.J., and Baldridge, A.M., 2008, ASTER land surface emissivity database of California and Nevada: Geophysical Research Letters, v. 35, no. 13, L13401, at https://doi.org/10.1029/2008GL034507.

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