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Can you create a DSM from Sentinel 1 imagery?
I have been working through the ASF’s “Recipes” for the creation of a DSM from Sentinel 1 (A and B) imagery. I am able to produce a DSM, and am relatively happy with the results in terms of the surface produced – it appears to follow the trends of my known datasets (hills where there should be hills and valleys where there are valleys).
Which is the best interferometric wide mode for Sentinel-1?
Sentinel-1 Interferometric Wide Swath Products The Interferometric Wide (IW) swath mode is the main acquisition mode over land for Sentinel-1. It acquires data with a 250 km swath at 5 m by 20 m spatial resolution (single look). IW mode captures three sub-swaths using Terrain Observation with Progressive Scans SAR (TOPSAR).
Is there a way to improve the DSM accuracy?
The process of generating the DSM is a long one, and having to repeat each step is time consuming, so a general idea of where I should focus my attention would help. Know someone who can answer?
Is it possible to produce a DSM with Dem?
I am able to produce a DSM, and am relatively happy with the results in terms of the surface produced – it appears to follow the trends of my known datasets (hills where there should be hills and valleys where there are valleys). I have however noticed artifacts or static in some areas of the surface produced.
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.
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.
What’s the best way to phase unwrap an interferogram?
For optimal unwrapping results, it is recommended to multi-look (i.e., square) and phase-filter (i.e. increase signal-to-noise and smooth) the interferogram, as instructed in the How to Create an Interferogram using ESA’s Sentinel-1 Toolbox recipe.