I just recently started using SNAP and trying to follow "TOPS Interferometry Tutorial
" by Braun and Veci (2021). But faced problem with initial step on [Radar] – [Sentinel-1 Tops] – [S1 TOPS Split].
The ID of S1 data that I’m using is “S1A_IW_SLC__1SDV_20180330T230608_20180330T230635_021251_0248CE_9238.SAFE.”
And the area of interest is a small area marked on blue star.
I was not able to find any useful information on what the cause is and how to solve it. Is this becasue if most part of IW3 is outside of the red box? What should I do in this case?
Question 2: I am trying to generate a elevation difference between two S1 data. Do I have to use IW3 since my AOI is located within it? Does it also mean that split of IW1 and IW2 will be uselss to me?
Question 3: Is TOPS split with selction of subswath (IW1, IW2, IW3) essential process? Why can I just skip and pre-process the entire SAR data and just crop (subset) a small area at the end?
Thank you so much for the help and please let me know if any additional information is needed.
I think it has to do with the ecosystem. It seems like the meta data of S1 SLC is corrupted and might be related to:
I asked about it 4 days ago.
In the newly downloaded files snap fails to read the IW3, even though the tiff files are in the folder.
You can also see the boundingbox of the split dialogue does not fit the IW3, usually it would fit at least the corners.
This is the S-1 product that I downloaded from ASF Data Search
It has three sub-swaths and I can do the TOPS split without problem. Can you try to download the product again to see if you get the complete product? Thanks