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Full catalog/AG100
AG100·v003·dataset

How well the land radiates heat (ASTER, 100 m)

ASTER Global Emissivity Dataset, 100 meter, HDF5 V003
land NASA LPCLOUD Level 3 HDF5
In plain English

What it measures. How efficiently the land surface gives off heat (its emissivity) along with land surface temperature, mapped globally at 100 m detail.

How it's made. Generated from ASTER instrument data on the Terra satellite using a temperature-and-emissivity separation method, combining only clear-sky scenes collected from 2000 through 2008.

How & where you'd use it. Supports studies of surface heat, geology and rock and soil types, land cover, and improving the accuracy of temperature measurements from space.

What's measured

LAND SURFACE › SURFACE RADIATIVE PROPERTIES › EMISSIVITYLAND SURFACE › SURFACE THERMAL PROPERTIES › LAND SURFACE TEMPERATUREBIOSPHERE › VEGETATION › VEGETATION INDEXLAND SURFACE › TOPOGRAPHY › TERRAIN ELEVATIONLAND SURFACE › TOPOGRAPHY › TERRAIN ELEVATION › TOPOGRAPHICAL RELIEF MAPSLAND SURFACE › TOPOGRAPHY › TERRAIN ELEVATION › DIGITAL ELEVATION/TERRAIN MODEL (DEM)LAND SURFACE › LAND USE/LAND COVER › LAND USE/LAND COVER CLASSIFICATION › VEGETATION INDEX › NORMALIZED DIFFERENCE VEGETATION INDEX (NDVI)

Coverage & cadence

  • Time span2000-01-01 → 2008-12-31
  • Measured byTerra (ASTER)
  • Processing levelLevel 3
  • Spatial extent-180, -90, 180, 90
  • FormatsHDF5
  • StatusCOMPLETE

What you can do with it

  • Track deforestation, fire scars and land-cover change
  • Monitor crop and vegetation health (NDVI/EVI)
  • Map how built-up vs. green an area is over time
Official description

Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Emissivity Dataset (GED) land surface temperature and emissivity (LST&E) data products are generated using the ASTER Temperature Emissivity Separation (TES) algorithm with a Water Vapor Scaling (WVS) atmospheric correction method using Moderate Resolution Imaging Spectroradiometer (MODIS) MOD07_L2 atmospheric profiles and the MODerate spectral resolution TRANsmittance (MODTRAN 5.2 radiative transfer model). This dataset is computed from all clear-sky pixels of ASTER scenes acquired from 2000 through 2008. AG100 data are available globally at spatial resolution of 100 meters. The National Aeronautics and Space Administration’s (NASA) Jet Propulsion Laboratory (JPL), California Institute of Technology, developed the ASTER GED product. Known Issues * Known issues are provided in Section 4, starting on page 8 of the User Guide.

Get the data

ag100_access.py
import earthaccess
earthaccess.login(strategy="netrc")          # free Earthdata Login

results = earthaccess.search_data(
    short_name="AG100",
    version="003",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),  # your area (W,S,E,N)
    temporal=("2024-01-01", "2024-12-31"),       # your dates
)
files = earthaccess.open(results)   # stream straight from LPCLOUD
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.