ASTER Digital Elevation Model V003Entry ID: AST14DEM3
Abstract: The ASTER Digital Elevation Model (DEM) product is generated using bands 3N (nadir-viewing) and 3B (backward-viewing) of an ASTER Level-1A image acquired by the Visible Near Infrared (VNIR) sensor. The VNIR subsystem includes two independent telescope assemblies that facilitate the generation of stereoscopic data. The Band-3 stereo pair is acquired in the spectral range of 0.78 and 0.86 microns ... with a base-to-height ratio of 0.6 and an intersection angle of about 27.7. There is a time lag of approximately one minute between the acquisition of the nadir and backward images.
Starting in early summer of 2006, LP DAAC has implemented a new production software for efficiently creating quality DEMs. Based on an automated stereo-correlation method, the new software generates a relative DEM without any ground control points (GCPs). It utilizes the ephemeris and attitude data derived from both the ASTER instrument and the Terra spacecraft platform. The new ASTER DEM is a single-band product with 30-meters horizontal postings that is geodetically referenced to the UTM coordinate system, and referenced to the Earth's geoid using the EGM96 geopotential model. Compared to ASTER DEMs previously available from the LP DAAC, users likely will note some differences in ASTER DEMs produced by the new system, because DEMs now are produced automatically, with no manual editing. Larger water bodies are detected and typically have a single value, but they no longer are manually edited. Any failed areas, while infrequent, remain as they occur. Cloudy areas typically appear as bright regions, rather than as manually edited dark areas.
The accuracy of the new LP DAAC-produced DEMs will meet or exceed accuracy specifications set for the ASTER relative DEMs by the applicable Algorithm Theoretical Basis Document (ATBD). Users likely will find that the DEMs produced by the new DAAC system have accuracies approaching those specified in the ATBD for absolute DEMs. Validation testing has shown that DEMs produced by the new system frequently are more accurate than 25 meters RMSExyz.
V003 data set release date: 2002-05-03
Data Set Characteristics:
Area: ~60 km x 60 km
Image Dimensions: 2500 rows x 2500 columns
File Size: ~25 MB
Projection: Universal Transverse Mercator (UTM)
Data Format: GeoTIFF
Vgroup Data Fields: 1
Data Set Citation
Dataset Originator/Creator: Land Processes Distributed Active Archive Center (LP DAAC)
Dataset Title: On Demand Digital Elevation Model V003
Dataset Release Date: 2002-05-03
Dataset Release Place: Sioux Falls, South Dakota, USA
Dataset Publisher: U.S. Geological Survey
Version: V003Online Resource: https://lpdaac.usgs.gov/
Start Date: 2001-03-06
Latitude Resolution: 30m
Longitude Resolution: 30m
Horizontal Resolution Range: 30 meters - < 100 meters
ISO Topic Category
Quality Sensor anomalies may be present.
Access Constraints See https://lpdaac.usgs.gov/products/aster_policies for data access information.
Use Constraints See https://lpdaac.usgs.gov/products/aster_policies for redistribution and citation policies.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 25 MB
Distribution Format: GeoTIFF
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
Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) publication references: [available online at http://asterweb.jpl.nasa.gov/ASTER_Bibliography_AGU_2013_02_21.pdf]
National Aeronautics and Space Administration, revised 2006, EOS Reference Handbook, a Guide to NASA's Earth Science Enterprise and the Earth Observing System: Greenbelt, Maryland, Goddard Space Flight Center, 261 p. [available online in pdf format at http://eospso.gsfc.nasa.gov/sites/default/files/publications/2006Re...].
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2013-11-27
Last DIF Revision Date: 2013-12-02