Description
The Terra Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Digital Elevation Model (AST14DEM) product is generated using bands 3N (nadir-viewing) and 3B (backward-viewing) of an ASTER Level 1A image acquired by the Visible and 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 27.7 degrees. There is a time lag of approximately one minute between the acquisition of the nadir and backward images. For a better understanding, refer to the diagram depicting the along-track imaging geometry diagram of the ASTER VNIR nadir and backward-viewing sensors.
Improvements/Changes from Previous Versions
- Radiometric Calibration Update: Version 4 applies Radiometric Calibration Coefficient Version 5 (RCC V5) to improve the radiometric accuracy of the raw DNs, based on research by Tsuchida and others (2020), published in Remote Sensing.
Product Summary
Citation
Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.
Copy Citation
Data Center Citation
Documents
ALGORITHM THEORETICAL BASIS DOCUMENT (ATBD) | The ATBD provides physical theory and mathematical procedures for the calculations used to produce the data products. | |
PRODUCT USAGE | DEM Comparison Guide | |
USER'S GUIDE | ASTER Higher-Level Product User Guide | |
USER'S GUIDE | The ASTER User Handbook provides in depth information on ASTER data products. | |
USER'S GUIDE | The technical information in the User's Guide enables users to interpret and use the data products. |