Sentinel-1

ESA active radar satellites

All Sentinels

• https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/overview
• Download at: https://scihub.copernicus.eu/dhus/#/home
  • Pick region on map, using button on the top right
  • Pick sensor, mode, dates with the filter, on the top left
    • Modes at https://sentinels.copernicus.eu/web/sentinel/user-guides/sentinel-1-sar/resolutions/level-1-single-look-complex
• use SNAP
  • https://senbox.atlassian.net/wiki/spaces/SNAP/pages/1898053693/SNAP+FAQs
  • Download at: https://step.esa.int/main/
  • Insure that you start the installer as administrator (right click, open as administrator)
  •  Sentinel-1, SAR
    • Open manifest.safe
    • Display of bands is initially very slow (they are huge)
  •  Sentinel-2, MSI
    • Open MTD_MSIL1C.xml
  • Sentinel-3

Sentinel-1:

• Sentinel Hub is good starting place to explore imagery
• https://asf.alaska.edu/how-to/data-recipes/geocode-sentinel-1-with-gdal/
• https://asf.alaska.edu/how-to/data-recipes/create-an-interferogram-using-esas-sentinel-1-toolbox/
  • Need to get sub_swath SLC burst mode, IW (each scene about 4 GB download, and 8 GB uncompressed)
  • May need to go to apply orbit file, and tell the program not to fail
• GRD is not projected, because it is in ground range geometry (the .tiff in the SAFE set is not a GeoTIFF). You need to first apply terrain correction to project and create a GeoTIFF, which will then have the geometry information embedded in the relevant TIFF tags (which gdal.open() recognises).
• Geocoding and terrain correction are different
• Multi-coherence product for volcanic eruptions
• StaMPS was developed by Hooper et al. (2004) to calculate PS-InSAR time series. Hooper, A., Zebker, H., Segall, P., & Kampes, B. (2004). A new method for measuring deformation on volcanoes and other natural terrains using InSAR persistent scatterers. Geophysical Research Letters, 31(23). https://doi.org/10.1029/2004gl021737

Last revision 3/27/2022