Hello dear Researchers, I need guidance related to derampdemod. working with single SLC_IW data, after applying derampdemod signal encountered with stripes. https://sentinels.copernicus.eu/documents/247904/1653442/Sentinel-1-TOPS-SLC_Deramping.pdf/b041f20f-e820-46b7-a3ed-af36b8eb7fa0?t=1533744826000 1 Anyone who worked with this process is given in the above link, actually, I need to produce figure.2. spectrum after derampdemod. I have attached one intensity image and after derampdemod I encountered stripes. Looking forward to your advice.
I suppose the stripes are on the interferogram. If so, this happens if you forget to apply the reramp/remod operation on the secondary burst after it has been resampled.
Basically, you need to undo the deramp/demod operation after resampling(apply the conjugate of the functions, while taking into account the change in the pixel grid reference system). You can check this article : "A COMPARATIVE STUDY OF DERAMPING TECHNIQUES FOR SENTINEL-1 TOPS IN THE CONTEXT OF INTERFEROMETRY"
Hope this helps;
Roland Akiki Muhammad Amjad Iqbal Hi Roland and Amjad,
Would you please let me know how can I apply de-ramping and re-ramping on S1 data? I have access to GAMMA and ESA SNAP, but couldn't find any module to re-ramp the data—Is there any open-source or freely available matlab/python code for these two processes?
Many thanks,
I am not an expert in SNAP but I found this bit of code that might perform the operation: https://github.com/senbox-org/s1tbx/blob/baa029b53b401daab31d37f1a4030c528d6b24ea/s1tbx-op-utilities/src/main/java/org/esa/s1tbx/utilities/gpf/RemodulateOp.java
I have no idea as to matlab/python implementations...maybe in isce: https://github.com/isce-framework/isce2
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