I am looking for finding ways to obtain free (non-commercial use) sources of synthetic aperture radar (SAR) satellite imagery. Does anyone know of sources?


5 Answers 5

  • You can get Sentinel-1 data from scihub.esa. Requires only registration (And most likely, non-commercial use). As Sentinel-1 has just become operational the archive is not very extensive but should grow quite quickly.
  • You can set request data-access propospal on Alaska Satellite Facility. Some data open access. For ALOS-PALSAR you must be a resident of the United States to receive approval for data access.
  • You can get data from UNAVCO SAR data archive.
  • And you can get data from earth.esa.int. To access the data, you must provide a project. To preview scenes, use EOLi esa. ENVISAT ASAR the best option.

Sentinel-1 data is published as Open Data, with attribution, see licence here. Registration required. An API is provided. See Scientific Data Hub for details. Software is also provided to process data.


JAXA have made global L-band SAR mosaics at 25 m spatial resolution available from the PALSAR sensor:


Registration is required to download the data.


Only managed to find a couple of sources for SAR images and data:

  • You can download SAR images from here which are mostly focused on ecological sites such as forests:

Example SAR image

  • You can download SAR samples from here which contain fairly large datasets (note: the last 4 links at the bottom of the SAR section are dead)

Here's a fuller answer about the synthetic aperture radar (SAR) data available from the Alaska Satellite Facility at no cost to users. The datasets include Seasat (1978 data newly processed in 2013), InSAR, PALSAR (including radiometrically terrain-corrected products), RADARSAT-1, ERS-1, ERS-2, JERS-1, UAVSAR, AirMOSS, AirSAR, and more.

SMAP data will become available in spring or summer 2015.

ASF's Get Started page, at https://www.asf.alaska.edu/get-data/get-started/, has a handy At-a-Glance Guide to Accessing Datasets.


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