Digital Earth Africa Sentinel-1 Radiometrically Terrain Corrected

agriculture deafrica disaster response earth observation geospatial natural resource satellite imagery sustainability

Description

DE Africa’s Sentinel-1 backscatter product is developed to be compliant with the CEOS Analysis Ready Data for Land (CARD4L) specifications. The Sentinel-1 mission, composed of a constellation of two C-band Synthetic Aperture Radar (SAR) satellites, are operated by European Space Agency (ESA) as part of the Copernicus Programme. The mission currently collects data every 12 days over Africa at a spatial resolution of approximately 20 m. Radar backscatter measures the amount of microwave radiation reflected back to the sensor from the ground surface. This measurement is sensitive to surface roughness, moisture content and viewing geometry. DE Africa provides Sentinel-1 backscatter as Radiometrically Terrain Corrected (RTC) gamma-0 (γ0) where variation due to changing observation geometries has been mitigated. The dual polarisation backcastter time series can be used in applications for forests, agriculture, wetlands and land cover classification. SAR’s ability to ‘see through’ clouds makes it critical for mapping and monitoring land cover changes in the wet tropics.

Update Frequency

New Sentinel-1 data are added regularly.

License

Access to Sentinel data is free, full and open for the broad Regional, National, European and International user community. View Terms and Conditions.

Documentation

https://docs.digitalearthafrica.org/en/latest/data_specs/Sentinel-1_specs.html

Managed By

See all datasets managed by Digital Earth Africa.

Contact

helpdesk@digitalearthafrica.org

Usage Examples

Tutorials
Tools & Applications

Resources on AWS

  • Description
    Sentinel-1 tiles and metadata
    Resource type
    S3 Bucket
    Amazon Resource Name (ARN)
    arn:aws:s3:::deafrica-sentinel-1
    AWS Region
    af-south-1
    AWS CLI Access (No AWS account required)
    aws s3 ls s3://deafrica-sentinel-1/ --region af-south-1 --no-sign-request
  • Description
    S3 Inventory files for L1C (ORC and CSV)
    Resource type
    S3 Bucket
    Amazon Resource Name (ARN)
    arn:aws:s3:::deafrica-sentinel-1-inventory
    AWS Region
    af-south-1
    AWS CLI Access (No AWS account required)
    aws s3 ls s3://deafrica-sentinel-1-inventory/ --region af-south-1 --no-sign-request
  • Description
    New scene notifications, can subscribe with Lambda or SQS. Message contains entire STAC record for each new Item.
    Resource type
    SNS Topic
    Amazon Resource Name (ARN)
    arn:aws:sns:af-south-1:543785577597:deafrica-sentinel-1-scene-topic
    AWS Region
    af-south-1
  • Description
    Bucket creation event notification, can subscribe with Lambda or SQS. Message sent by deafrica-sentinel-1 s3 bucket all object create events.
    Resource type
    SNS Topic
    Amazon Resource Name (ARN)
    arn:aws:sns:af-south-1:543785577597:deafrica-sentinel-1-topic
    AWS Region
    af-south-1

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