Sentinel 1 – SAR

Description of the layer

The 'Sentinel 1 mosaic' product is derived from processing ESA's Sentinel-1 C-band Synthetic Aperture Radar (SAR) images available for a certain date-range. The imagery is based on radar data which means that the land-cover is detected though the different textures rather than colors.

Synthetic Aperture Radar (SAR)

Spatial resolution

Global coverage

Pixel size:

10m x 10m

Temporal resolution

Mosaics available between 2017 and 2020

12 days revisit time

European Space Agency (ESA) - SENTINEL

Source data: SENTINEL-1

European Union/ESA/Copernicus - SENTINEL-1 mission

SENTINEL-1 is an imaging radar mission providing continuous all-weather, day-and-night imagery at C-band. The SENTINEL-1 constellation provides high reliability, improved revisit time, geographical coverage and rapid data dissemination to support operational applications in the priority areas of marine monitoring, land monitoring and emergency services.

The Sentinel-1 mission provides data from a dual-polarization C-band[1] Synthetic Aperture Radar (SAR) instrument. This collection includes the S1 Ground Range Detected (GRD) scenes, processed using the Sentinel-1 Toolbox to generate a calibrated, ortho-corrected product. The collection is updated daily. New assets are ingested within two days after they become available.

· SAR's inherent capability to observe during cloud cover and Sentinel-1's frequent revisits makes it ideal for flood monitoring. It can be used to assess the extent of flooded areas and the impact on human, economic and environmental loss. The adverse weather conditions during flooding events make Synthetic Aperture Radar (SAR) a suitable approach due to its independence on weather and solar illumination, which is not the case in optical remote sensing.

· Sentinel-1 can play an important role in sustainable forest management with clear-cut and partial-cut detection, forest type classification, biomass estimation and disturbance detection. For climate change, mapping of forest fire scars can be an important part of mapping the carbon history of a forest and plays a critical role in the estimation of carbon emissions.

[1] C-Band: A nominal frequency range, from 8 to 4 GHz (3.75 to 7.5 cm wavelength) within the microwave (radar) portion of the electromagnetic spectrum. Imaging radars equipped with C-band are generally not hindered by atmospheric effects and are capable of imaging through tropical clouds and rain showers. Its penetration capability with regard to vegetation canopies or soils is limited and is restricted to the top layers.