Sentinel-1 Global Backscatter Model (S1GBM)

Sentinel-1 Global Backscatter Model
Global backscatter model
Mapping Earth's land surface with C-band Synthetic Aperture Radar (SAR)


The Sentinel-1 Global Backscatter Model (S1GBM) describes the C-band radar cross section of the Earth's land surface of the between 2016 and 2017, generated from 460,000 Copernicus Sentinel-1 IW GRDH (Ground-Range Detected High Resolution) backscatter measurements normalised to the reference incidence angle of 38°. This release of the S1GBM comprises two global mosaics describing the temporal mean of sigma nought backscatter s0(38, t) in VV- and VH-polarisation respectively.

The S1GBM supports the testing, design, and verification of upcoming radar sensors, related SAR-processor performance simulations, raw data compression optimisation, and visualisation purposes. It also presents a valuable environmental record for investigating the C-band VV/VH backscatter response over different land covers, and documenting the state of the land surface in 2016 and 2017.

Data Set Specifications

Digital Object Identifier (DOI): 10.48436/n2d1v-gqb91

The S1GBM VV and VH mosaics are georeferenced to the Equi7Grid and divided into six continental zones (Africa, Asia, Europe, North America, Oceania, South America), which are further divided into square tiles of 100 km extent ("T1"-tiles). The dataset is organised in 12 collections, one for each of the 6 continents and the 2 polarisations. In addition to the original data images, downsampled quicklook-files of same geographic extent are available for all tiles, allowing for a convenient preview of the data. With this setup, the S1GBM consists of 16,071 tiles over 6 continents, for VV and VH each, totalling to a data volume of 2.67 TB.

The tiles' file-format is a LZW-compressed GeoTIFF holding 16-bit integer values, with tagged metadata on encoding and georeference. Compatibility with common geographic information systems, such as QGIS or ArcGIS, and geodata libraries, such as GDAL, is given.

Each mosaic is provided as tiles that are organised in a folder structure per continent. With this, 12 zipped dataset-collections per continent are available for download.

Spatial coverage: 82 N, -57 S, -180 W, 180 E
Temporal coverage: 2016-01-01 - 2017-12-31
Spatial sampling: 10 m
Polarisation options: VV, VH
Collection format: .zip
Fileformat: .geotiff
Total volume: 2.67 TB
Total file count: 64276

Processing Level

Level 3

How to access this data

The data set is hosted by TU Wien and can be accessed via the TU Data repository website.

Intuitive pan-and-zoom exploration and dataset preview is by EODC via a web-based data viewer.

Please see the resources section for useful tools on data handling.

Applicable terms and conditions

Rights are reserved with ESA.

Open use is granted under the CC BY 4.0 license.


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