NASA Shuttle Radar Topography Mission Combined Image Data Set V003

Description

The Land Processes Distributed Active Archive Center (LP DAAC) is responsible for the archive and distribution of NASA Making Earth System Data Records for Use in Research Environments ([MEaSUREs](https://earthdata.nasa.gov/about/competitive-programs/measures)) SRTM, which includes the global 1 arc second (~30 meter) combined (merged) image data product. (See User Guide Section 2.2.2) The combined image data set contains mosaicked one degree by one degree images/tiles of uncalibrated radar brightness values at 1 arc second. To create a smooth mosaic image, each pixel in an output is an average of all the image pixels for a location. Pixels with a value of zero (voids) were not counted. Because SRTM imaged a given location with two like-polarization channels (VV = vertical transmit and vertical receive, and HH = horizontal transmit and horizontal receive) and at a variety of look and azimuth angles, the quantitative scattering information was lost in the pursuit of a smoother image product unlike the SRTM swath image product [SRTMIMGR](https://doi.org/10.5067/MEaSUREs/SRTM/SRTMIMGR.003), which preserved the quantitative scattering information.The NASA SRTM data sets result from a collaborative effort by the National Aeronautics and Space Administration (NASA) and the National Geospatial-Intelligence Agency (NGA - previously known as the National Imagery and Mapping Agency, or NIMA), as well as the participation of the German and Italian space agencies. This collaboration aims to generate a near-global digital elevation model (DEM) of Earth using radar interferometry. SRTM was the primary (and virtually only) payload on the STS-99 mission of the Space Shuttle Endeavour, which launched February 11, 2000 and flew for 11 days.The SRTM swaths extended from ~30 degrees off-nadir to ~58 degrees off-nadir from an altitude of 233 kilometers (km), creating swaths ~225 km wide, and consisted of all land between 60° N and 56° S latitude to account for 80% of Earth's total landmass. Known Issues* Known issues in the NASA SRTM are described in the following publication: * Rodriguez, E., C. S. Morris, and J. E. Belz (2006), A global assessment of the SRTM performance, Photogramm. Eng. Remote Sens., 72, 249–260. https://doi.org/10.14358/PERS.72.3.249Improvements/Changes from Previous Version* Version 3.0 products are filled with ASTER Global Digital Elevation Model (GDEM) Version 2.0, the Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010), and the National Elevation Dataset (NED).

Resources

Name Format Description Link
5 https://e4ftl01.cr.usgs.gov%2FMEASURES%2FSRTMIMGM.003%2F
5 https://search.earthdata.nasa.gov%2Fsearch%3Fq%3DC2763268443-LPCLOUD
5 https://doi.org%2F10.5067%2FMEaSUREs%2FSRTM%2FSRTMIMGM.003
5 https://lpdaac.usgs.gov%2F
5 https://eospso.nasa.gov%2Fmissions%2Fshuttle-radar-topography-mission
5 https://lpdaac.usgs.gov%2Fdocuments%2F179%2FSRTM_User_Guide_V3.pdf
5 https://lpdaac.usgs.gov%2Fdocuments%2F13%2FSRTM_Quick_Guide.pdf
5 https://doi.org%2F10.1029%2F2005RG000183
5 https://data.lpdaac.earthdatacloud.nasa.gov%2Flp-prod-public%2FSRTMIMGM.003%2FN23E020.SRTMIMGM.img%2FN23E020.SRTMIMGM.img.jpg.2.jpg
5 https://opendap.cr.usgs.gov%2Fopendap%2Fhyrax%2FDP109%2FSRTM%2FSRTMIMGM.003%2Fcontents.html
5 https://www.earthdata.nasa.gov%2Fcenters%2Flp-daac
5 SRTMIMGM.003 https://e4ftl01.cr.usgs.gov/MEASURES/SRTMIMGM.003/
5 https://search.earthdata.nasa.gov/search?q=C2763268443-LPCLOUD
21 SRTMIMGM.003 https://doi.org/10.5067/MEaSUREs/SRTM/SRTMIMGM.003
5 https://www.earthdata.nasa.gov/centers/lp-daac
5 https://eospso.nasa.gov/missions/shuttle-radar-topography-mission
33 SRTM_User_Guide_V3.pdf https://lpdaac.usgs.gov/documents/179/SRTM_User_Guide_V3.pdf
33 SRTM_Quick_Guide.pdf https://lpdaac.usgs.gov/documents/13/SRTM_Quick_Guide.pdf
21 https://doi.org/10.1029/2005RG000183
22 N23E020.SRTMIMGM.img.jpg.2.jpg https://data.lpdaac.earthdatacloud.nasa.gov/lp-prod-public/SRTMIMGM.003/N23E020.SRTMIMGM.img/N23E020.SRTMIMGM.img.jpg.2.jpg

Tags

  • earth-science-topography-land-surface-terrain-elevation
  • earth-science-topography-land-surface-terrain-elevation-topographical-relief-maps
  • earth-science-radar-spectral-engineering-radar-imagery

Topics

Categories