Deformation in the Carlsbad, New Mexico, region is revealed in this Sentinel-1 InSAR beta image. Created through the collaborative Getting Ready for NISAR project with JPL, this image is one of many available through either ASF DAAC’s Vertex or NASA’s Earthdata Search. See the full article for more about the project, available products, and how to offer feedback. Image credit: ASF DAAC & JPL 2017, contains modified Copernicus Sentinel data 2017.

Sentinel-1 Interferograms

Sentinel-1 Interferogram (BETA) products are prototype Level 2 interferometric products produced as part of the Getting Ready for NISAR (GRFN) project using the ARIA Science Data System under development for the NASA-ISRO Synthetic Aperture Radar (NISAR) mission. The creation, discovery, and distribution of these products is to inform the NISAR mission team of possible cloud-based processing and data management solutions. As such, these prototype products are not part of the ASF long-term archive and may become unavailable at any time as new SAR interferometric processing and delivery methods are explored.

Products


Sentinel-1 interferograms are available as NetCDF-4 products including the following science data:

  • Unwrapped Phase
  • Coherence
  • Amplitude
  • Connected components

Each data layer is also available as a stand-alone GeoTIFF product. More information is available in the full product specification.

Processor


Products were processed using Jet Propulsion Laboratory’s (JPL’s) ARIA Science Data System under development for the NISAR mission, using the InSAR Scientific Computing Environment (ISCE) software package.

Get Interferograms

Register for an Earthdata Login Account


A NASA EOSDIS Earthdata Login account is required for downloading data from the Alaska Satellite Facility. Visit the Register for an Earthdata Login Profile page to create an account.

Get Interferograms via Vertex


 

 

Sentinel-1 Interferogram (BETA) products can be browsed in Vertex by selecting “S1 InSAR (BETA)” from the dataset menu.

Get Interferograms via Earthdata Search


 

Sentinel-1 Interferogram (BETA) products can be located in Earthdata Search by entering “sentinel-1 interferograms” in the search bar. For more information, visit the How to Search using Earthdata Search documentation.

Command Line Tools

There are many ways to access Sentinel-1 interferograms for users comfortable working at the command line. Below are steps and options to explore.

Find Interferograms via the ASF Search API


Sentinel-1 Interferogram (BETA) products are searchable via the ASF Search API. Visit the documentation for details and available search parameters.

Interferograms are most easily searched using these values for the processinglevel keyword:

  • GUNW_STD — Standard Product, NetCDF
  • GUNW_AMP — Amplitude, GeoTIFF
  • GUNW_COH — Coherence, GeoTIFF
  • GUNW_CON — Connected Components, GeoTIFF
  • GUNW_UNW — Unwrapped Phase, GeoTIFF

For example, this search returns a list of “Standard Product, NetCDF” products over Pasadena, CA since Jan 1, 2018:

https://api.daac.asf.alaska.edu/services/search/param?processinglevel=GUNW_STD&start=2018-01-01&intersectswith=point(-118.1445+34.1478)&output=csv&maxResults=50

Find Interferograms via the CMR Search API


Sentinel-1 Interferogram (BETA) products are integrated with the ESDIS Common Metadata Repository (CMR), and are searchable via the CMR Search API. Visit the documentation for details and available search parameters.

Interferograms are most easily searched using these values for the collection_concept_id parameter:

  •  C1595422627-ASF — Standard Product, NetCDF
  • C1596065640-ASF — Amplitude, GeoTIFF
  • C1596065639-ASF — Coherence, GeoTIFF
  • C1596065641-ASF — Connected Components, GeoTIFF
  • C1595765183-ASF — Unwrapped Phase, GeoTIFF

For example, this search returns a list of “Standard Product, NetCDF” products over Pasadena, CA since Jan 1, 2018:

https://cmr.earthdata.nasa.gov/search/granules.csv?collection_concept_id=C1595422627-ASF&temporal=2018-01-01T00:00:00Z,&point=-118.1445,34.1478&page_size=50

Get Interferograms via cURL and Wget


The download URL for each product can be extracted from search results and downloaded via command-line tools like cURL and Wget. Visit How To Access Data With cURL and Wget for instructions on downloading products, including how to provide your Earthdata Login credentials via a .netrc file.