4dc0defe-68c3-4546-8608-33c5c8351c11 Gregory Giuliani University of Geneva Lecturer +41 (0) 22 3790709 Telephone number of a facsimile machine for the responsible organization or individual 66 Boulevard Carl-Vogt Geneva 1205 Switzerland gregory.giuliani@unige.ch http://www.unige.ch/envirospace 2024-08-13T08:47:22 ISO 19115:2003/19139 1.0 EPSG:4326 Landsat 5 Analysis Ready Data 2020-03-10T00:00:00 ls5_ledaps_swiss This dataset is the Landsat 5 Analysis Ready Data (ARD) - Level 2 (surface reflectance) archive for Switzerland. Detailed description about the Landsat 5 mission can be found in the CEOS Earth Observation Handbook: http://database.eohandbook.com/database/missionsummary.aspx?missionID=226 The Landsat archive is extremely interesting because this is the longest EO program, initiated in 1972, it has provided continual and consistent observations for almost 50 years. Since 2008, the complete data archive has been provided under a free and open access policy. This has enabled dense time-series analysis, moving beyond simple diachronic comparison of a set of images, therefore dramatically improving capabilities to monitor environmental changes. To cover the whole of Switzerland, it requires eight Landsat 5 scenes (Path/Row: 193/027, 194/027, 195/027, 196/027, 193/028, 194/028, 195/028, 196/028) representing an area of latitude 44.9 to 48.7 and longitude 4.1 to 12.8. Data are downloaded as Collection 1/Tier 1 – Level 2 Surface Reflectance encompassing a surface of approximately 185km by 180km. Collection 1/Tier 1 scenes are data with the highest available data quality (e.g., geometric and radiometric corrections) and considered suitable for time-series analysis (https://www.usgs.gov/land-resources/nli/landsat/landsat-collection-1). Level 2 corresponds to surface reflectance (i.e., the estimate based on Landsat sensor observations of the fraction of incoming solar radiation reflected from Earth’s surface). These data are corrected for atmospheric perturbations (e.g., aerosol scattering, thin clouds) enabling direct comparison between multiple images and dates. This corresponds to the ARD level. Landsat data are provided by USGS with Quality Assessment (QA) information to help users to determine their suitability for specific applications. An 8-bit LandsatLook Quality Image and 16-bit Quality Assessment Band40 are also included. Details on each file are described at: https://www.usgs.gov/land-resources/nli/landsat/landsat-collection-1-level-1-quality-assessment-band. Level 2 products are generated by the USGS from level 1 product and using the official LEDAPS/LASRC algorithm. "A Pixel Quality Assurance (pixel_qa) band is provided with all Landsat Surface Reflectance-derived Spectral Indices. The band is in unsigned 16-bit format, values are bit-packed and provide information pertaining to a pixel condition of fill, clear, water, cloud shadow, snow, cloud (yes/no), cloud confidence and cirrus cloud confidence (Landsat 8 only)" https://www.usgs.gov/land-resources/nli/landsat/landsat-sr-derived-spectral-indices-pixel-quality-band. Landsat are sun-synchronous satellites jointly operated by the United States Geological Survey (USGS) and National Aeronautics and Space Administration (NASA). They are essentially designed for land applications such as Earth resources, land surface, environmental monitoring, agriculture and forestry, disaster monitoring and assessment, ice and snow cover. Bruno Chatenoux UNEP/GRID-Geneva bruno.chatenoux@unepgrid.ch https://geonetwork.swissdatacube.org/geonetwork/srv/api/records/4dc0defe-68c3-4546-8608-33c5c8351c11/attachments/Landsat_GN.png https://geonetwork.swissdatacube.org/geonetwork/srv/api/records/4dc0defe-68c3-4546-8608-33c5c8351c11/attachments/Slide1.png Swiss Data Cube Earth Observations Landsat 5 Analysis Ready Data Switzerland 30 environment geoscientificInformation imageryBaseMapsEarthCover 5.95661377423453 10.4934735095497 45.8191539516188 47.8098679329775 1984 2013 Collection name: ls5_ledaps_swiss OGC NetCDF 1.0 Bruno Chatenoux UNEP/GRID-Geneva bruno.chatenoux@unepgrid.ch https://sdc.unepgrid.ch:8080 WWW:LINK-1.0-http--link Jupyter Notebook http://sdc.unepgrid.ch null SDC Web UI https://doi.org/10.26037/yareta:6xolwgc6irbyjhczigqbizlefm DOI Yareta Repository Landsat Collection 1/Tier 1 – Level 2 Surface Reflectance