How do I create a DEM using Sentinel-1 data?
Create the DEM — Convert Phase to Elevation
- In Sentinel-1 Toolbox, in the Radar tab, select Interferometric > Products > Phase to Elevation.
- Enter the unwrapped interferometric product filename in Source Product, source:
- Click Run.
- You now have a DEM file called yoursourcefilename_dem.
What are the steps involved in generating a DEM?
The Order of DEM Creating Steps
- S1 TOPS Coregistration.
- Creating Interferogram.
- Debursting.
- Goldenstein Phase Filtering.
- Multilooking.
- Exporting to Snaphu, unwrapping and importing back.
- Phase to Elevation.
- Range-Doppler Terrain Correction.
How to create a Dem using Sentinel-1 data?
Notice that the Visualize Interferometric Phase — Topographic Phase Removal and Multi-looking and Phase Filtering — Multi-looking steps are deliberately omitted. Open the wrapped interferogram file. Use the file ending Orb_Stack_ifg_deb_flt.dim. Creating a subset can significantly speed up processing.
Where do I find the Sentinel toolbox on my computer?
1. Initiate the Sentinel Toolbox by clicking on its desktop icon 2. In the Sentinel Toolbox interface, go to the Filemenu and select Open Product 3. Select the folder containing your Sentinel-1 file, and double click on the .zip file (do not unzip the file; the program will do it for you)
How do I export an interferogram from Sentinel-1?
Export your interferogram or your subset interferogram from Sentinel-1 Toolbox to SNAPHU. In Sentinel-1 Toolbox, navigate to Radar > Interferometric > Unwrapping > Snaphu Export. Create a new folder for this step by entering a path and new folder name. Type the folder directory in the Target Folder box.
What’s the vertical accuracy of Sentinel-1 SAR data?
Here I found an article “Preliminary results of using Sentinel-1 SAR data for DSM generation”, 2015. As I understood, the vertical accuracy will not be better than 20m (an average height of a single tree). That is comparable to the SRTMGL1, GDEM2 accuracy.