Alaska Satellite Facility
Delivering Remote Sensing Data Since 1991
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About ASF DAAC Data

The ASF DAAC has a large archive of synthetic aperture radar (SAR) data from a variety of sensors, available at no cost. Some of the SAR datasets in the ASF DAAC archive requires a short NASA proposal for access. In accordance with the memoranda of understanding (MOU) between the relevant flight agencies (CSA, ESA, JAXA) and the U.S. State Department, the ASF DAAC does not distribute SAR data for commercial use. 

Sentinel-1, ALOS PALSAR and other SAR data are open access and immediately downloadable from ASF's Vertex interface , or from the ASF website. ERS-1, ERS-2, JERS and RADARSAT-1 datasets have been acquired in partnership with other nations' space programs. Those datasets require data proposals or preconditions. In addition some datasets have residency requirements. For more information see the Get Started guide.

Get SAR Data      

Synthetic aperture radar imagery

Use the Get Started Guide to learn how to access and use Synthetic Aperture Radar (SAR) data for a wide range of research.
Vertex is a powerful online tool for accessing the ASF Synthetic Aperture Radar (SAR) DAAC archive. Vertex enables researchers to select areas on a map and see lists of downloadable datasets for those areas. Researchers can filter the lists to just get the data they need.
ASF's API is an application programming interface that enables command-line search and download.
For more about Sentinel data, click image.

Data Citations & Acknowledgements

Get SAR Data

Get SAR Data

Select and download SAR data online using Vertex.

Use the ASF API for downloading SAR data via a command line.