a7f13bda-7df4-40ec-a059-73bf21553eb3 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 2024-08-13T08:49:37 ISO 19115:2003/19139 1.0 EPSG:4326 Sentinel-1 Analysis Ready Data 2020-03-10T00:00:00 s1_l3comp_swiss This dataset is the Sentinel-1 Analysis Ready Data (ARD) archive for Switzerland. Detailed description about the Sentinel-1 missions can be found in the CEOS Earth Observation Handbook: Sentinel-1A (http://database.eohandbook.com/database/missionsummary.aspx?missionID=575) and Sentinel-1B (http://database.eohandbook.com/database/missionsummary.aspx?missionID=576). To produce Sentinel-1 Analysis Ready Radiometrically Terrain Corrected (RTC) products, ground range detected (GRD) products are downloaded from the EU scihub.copernicus.eu. A digital elevation model (DEM) is then used to generate an image simulation of the local contributing area within each image sample. That area is used to normalise the backscatter (rather than the ellipsoid model otherwise typically used) in ground range geometry. Then that normalized backscatter is terrain-geocoded (orthorectified) into the chosen map coordinates, producing a level-1 RTC product. Sets of multiple RTC products acquired from different orbit tracks within a tight temporal window are then combined using local resolution weighting into level-3 multitemporal backscatter composite products. The region covered is latitude 44.5 to 48.5N, longitude 5.5-11E, at 90m spatial resolution and 6 day temporal spacing. The geometry of Sentinel-1 data is well calibrated: data can be geocoded without any tiepoints to an accuracy of a few centimeters , far better than is possible with optical sensors. Sentinel-1 radiometric stability is monitored and calibrated within the Sentinel-1 Mission Performance Centre. A broad review of the quality of multiple implementations of radiometric terrain correction (RTC) processing was provided in. The quality of the terrain correction and radiometric corrections depends on the quality of the input DEM made available. Participants in the Copernicus programme (currently not including Switzerland) are able to access a world-wide high-quality DEM with 30m resolution, with 10m models available in some regions. Sentinel-1 (S1) is a constellation of two sun-synchronous satellites operated by the European Space Agency (ESA) from 2014 to 2021 (Sentinel-1A) and 2016 to 2023 (Sentinel-1B). Sentinel-1C and -1D are funded and will be launched in the coming years. Each satellite carries a C-band Synthetic Aperture Radar (SAR) able to monitor sea ice zones and the arctic environment, surveille marine environments, monitor land surface motion risks using radar interferometry, and provide mapping in support of humanitarian aid in crisis situations. Bruno Chatenoux UNEP/GRID-Geneva bruno.chatenoux@unepgrid.ch David Small University of Zurich david.small@geo.uzh.ch https://geonetwork.swissdatacube.org/geonetwork/srv/api/records/a7f13bda-7df4-40ec-a059-73bf21553eb3/attachments/Sentinel-1_logo.jpg Swiss Data Cube Earth Observations Sentinel-1 Analysis Ready Data Switzerland 90 environment geoscientificInformation imageryBaseMapsEarthCover 5.95661377423453 10.4934735095497 45.8191539516188 47.8098679329775 2014 2023 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:bcxcmm53rjfbznxzat6nivqi3m DOI Yareta Repository Sentinel-1 Radiometrically Terrain Corrected (RTC) products are generated by the University of Zurich (UZH)