NASADEM SRTM Image Mosaic provides a global Digital Elevation Model derived from radar interferometry data collected during the STS-99 mission in February 2000. The dataset covers land between 60° N and 56° S latitude, accounting for approximately 80% of Earth's landmass. It was produced by NASA's LP DAAC using telemetry from the Shuttle Radar Topography Mission.
Use Cases
- Analyze elevation patterns from the radar combined images layer for slope and aspect calculations.
- Use the NUM file associated with combined images for quality assessment and data reliability checks.
- Compare surface elevation measurements with ICESat GLAS ground control points for validation.
- Apply the 1 arc-second spacing data for high-resolution topographic mapping and 3D visualization.
- Fill data voids using interpolation methods described in the reprocessing improvements for complete coverage.
Strengths
- Global coverage spanning 60° N to 56° S latitude, covering about 80% of Earth's landmass.
- Data derived from original SRTM telemetry with reprocessing improvements including geoid reference conversion.
- Distributed in standardized 1 degree by 1 degree tiles for systematic access.
Limitations
- Data collection occurred during a single 11-day mission in February 2000, limiting temporal recency.
- Coverage excludes polar regions above 60° N and below 56° S latitude.
- Specific row counts, file sizes, and detailed column structures are unknown from the provided description.
Provenance
- Source
- NASA Land Processes Distributed Active Archive Center (LP DAAC).
- Collection Method
- Derived from Shuttle Radar Topography Mission (SRTM) radar interferometry telemetry, with additional processing using ASTER GDEM, ICESat GLAS, and AW3D30 DEM data.
- Time Range
- Primary data collected during the STS-99 mission launched on February 11, 2000.
- Freshness
- null
- Geography
- Global land coverage between 60° N and 56° S latitude.