Science Keywords>LAND SURFACE
North American ASTER Land Surface Emissivity DatabaseEntry ID: naalsed
Abstract: The North American Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) Land Surface Emissivity Database (NAALSED) covers the continent with 3,327 1 degree (°) x 1° tiles of 100-meter (m) resolution data. The data are placed in geographic coordinates (latitude, longitude) and distributed as Hierarchical Data Format Version 5 (HDF5) files.
Each NAALSED product contains several ... layers of related data such as Emissivity, Temperature, and a top of atmosphere Normalized Difference Vegetation Index (NDVI). Additional supporting layers include a regional version of the ASTER Global Digital Elevation Model (GDEM) V001 resampled to 100-m, a land water map, pixel geographic coordinates, and the number of observations used as input. The NAALSED parameters are averaged for every clear-sky pixel available in the ASTER mission record from 2000 through 2010. A New ASTER Cloud Mask Algorithm (NACMA) 2 was developed specifically to identify inputs to the ASTER Land Surface Emissivity Aggregation Algorithm (ALSEA) 1 that generates the parameter means and standard deviations in each tile. A full description of the methodology used to generate NAALSED is written in the references below.3
SPECIAL NOTE: The Emissivity Science Data Set in the NAALSED product is multidimensional, i.e., the emissivity layer is a stack of layers including mean and standard deviation for each of the five spectral Bands. MATLAB routines were used to write the data layer, which are executed in column-major rather than row-major order. "Column-major" means that arrays are read up and down instead of back and forth, resulting in an image with values rotated 90 degrees and flipped horizontally.
Please note NAALSED is affected as any other ASTER product by the loss of stable SWIR data from April 2008 forward.
1 Hulley, G.C., S.J. Hook, and , A.M. Baldridge, 2008, ASTER Land Surface Emissivity Database of California and Nevada, Geophysical Research Letters, Vol. 35, L13401, doi:10.1029/2008GL034507
2 Hulley G.C., and S.J. Hook, 2008, A New Methodology for Cloud Detection and Classification with Advanced Spaceborne Thermal Emission and Reflection (ASTER) Data , Geophysical Research Letters, Vol. 35, L16812, doi:10.1029/2008GL034644
3 Hulley, G. C. and S. J. Hook, 2009 The North American ASTER land surface emissivity database (NAALSED) version 2.0, Remote Sensing of Environment, vol. 113, no. 9, pp. 1967-1975, September
4 Hulley, G.C., and S.J. Hook, 2010, Generating Consistent Land Surface Temperature and Emissivity Products Between ASTER and MODIS Data for Earth Science Research, IEEE Transactions on Geoscience and Remote Sensing, DOI: 10.1109/TGRS.2010.2063034.
5 Hulley, G. C., S. J. Hook, and A. M. Baldridge, 2009. Validation of the North American ASTER Land Surface Emissivity Database (NAALSED) Version 2.0., Remote Sensing of Environment, 113, 2224-2233.
V003 data set release date: 2002-05-03
Data Set Characteristics:
Geographic Extent: (80°North, -171°West) (22°North, -54°West)
Scene Coverage: 1º x 1º tiles
Image Dimensions: 1,000 x 1,000
Tile Volume: ~40 MB
File Format: Hierarchical Data Format Version 5 (HDF5)
Map Projection: Geographic Lat/Lon
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Data Set Citation
Dataset Originator/Creator: Hulley, G.C. and S.J. Hook
Dataset Title: NAALSED
Dataset Series Name: North American Advanced Spaceborne Thermal Emission and Reflection radiometer Land Surface Emissivity Database
Dataset Release Date: 2012-02-03
Dataset Release Place: Sioux Falls, SD, USA
Dataset Publisher: NASA LP DAAC
Version: V003Online Resource: https://lpdaac.usgs.gov
Start Date: 2000-11-10Stop Date: 2010-12-31
Latitude Resolution: 100 m
Longitude Resolution: 100 m
Horizontal Resolution Range: 100 meters - < 250 meters
BIOSPHERE > VEGETATION > VEGETATION INDEX
LAND SURFACE > LAND TEMPERATURE > LAND SURFACE TEMPERATURE
LAND SURFACE > SURFACE RADIATIVE PROPERTIES > EMISSIVITY
LAND SURFACE > SURFACE RADIATIVE PROPERTIES > THERMAL PROPERTIES
LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHICAL RELIEF
Quality Users are advised that ASTER SWIR data acquired from late April 2008 to the present exhibit anomalous saturation of values and anomalous striping. This effect is also present for some prior acquisition periods. Please refer to the ASTER SWIR User Advisory Document (https://lpdaac.usgs.gov/sites/default/files/public/aster/docs/ASTER...) for more details.
Access Constraints None.
Use Constraints None.
Data Set Progress
Distribution Media: HTTP
Distribution Size: ~40 MB Tiles
Distribution Format: HDF5
Role: TECHNICAL CONTACT
Phone: (Toll Free) (866) 573-3222
Phone: (605) 594-6116
Fax: (605) 594-6963
Email: LPDAAC at usgs.gov
LP DAAC User Services U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center 47914 252nd Street
City: Sioux Falls
Province or State: SD
Postal Code: 57198-0001
Hulley, G.C., S.J Hook, and A.M. Baldridge (2008), ASTER Land Surface Emissivity Database of California and Nevada, Geophysical Research Letters, 35, doi:10.1029/2008GL034507
Hulley, G.C., and S.J Hook (2008), A New Methodology for Cloud Detection and Classification with Advanced Spaceborne Thermal Emission and Reflection (ASTER) Data, Geophysical Research Letters, 35, doi:10.1029/2008GL034644
Hulley, G. C. and S. J. Hook (2009), The North American ASTER land surface emissivity database (NAALSED) version 2.0, Remote Sensing of Environment, 113, 9
Hulley, G.C., and S.J. Hook (2010), Generating Consistent Land Surface Temperature and Emissivity Products Between ASTER and MODIS Data for Earth Science Research, IEEE Transactions on Geoscience and Remote Sensing, doi:10.1109/TGRS.2010.2063034
North American ASTER Land Surface Emissivity Database (NAALSED) publication references: [available online at http://emissivity.jpl.nasa.gov/pubs]
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2012-01-03
Last DIF Revision Date: 2013-01-31