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How to mitigate turbulent signals in interferograms when performing the SBAS process on Sentinel-1 SLCs?

Added by Jiaqing WANG 10 months ago

Hi everyone,

When I use the "mb" program to perform the SBAS processing on co-registered SLC data, I observe turbulent signals of varying degrees in some interferograms, as shown in the attached figure (20211231_20220112.diff0.png is the differential interferogram, and 20211231_20220112.diff.unw.atm_removed.png is the unwrapped phase after removing the tropospheric delay related to elevation.). I would like to know whether these signals will significantly degrade the accuracy of the time series deformation decomposition. If so, how can I mitigate the impact of these signals? I am aware that removing turbulent signals has always been a challenge; can anyone provide some methods for removing them?

I would be greatly appreciative if anyone could offer any assistance.

Wang

Download all files
20211231_20220112.diff0.png (3.5 MB) 20211231_20220112.diff0.png
20211231_20220112.diff.unw.atm_removed.png (3.46 MB) 20211231_20220112.diff.unw.atm_removed.png

Replies (4)

RE: How to mitigate turbulent signals in interferograms when performing the SBAS process on Sentinel-1 SLCs? - Added by Redmine Admin 10 months ago

Am 04.03.24 um 08:08 schrieb TARIQASHRAF:

Hi Mr. 家庆 王,
I am sorry since I am a new user dont know much about this topic. But can you please update me how to generate these interferograms in picture format with the legend bar? did you use some external software or GAMMA do have commands for this? If yes can you please share the commands for this process. Good luck
best regards

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RE: How to mitigate turbulent signals in interferograms when performing the SBAS process on Sentinel-1 SLCs? - Added by Igor Babayants 10 months ago

Hi, TARIQASHRAF.
I think, that is merge with two images - interferogram and colorbar images.

For example, command for create colorbar is:
vis_colormap_bar.py hls.cm pdef_err.color_bar.png 0.000 0.001 -l "deformation rate estimation error [m/year]"

Input vis_colormap_bar.py in GAMMA command window for more information.
Ask for more, if needed.

pdef_err.color_bar.png (50.6 KB) pdef_err.color_bar.png

RE: How to mitigate turbulent signals in interferograms when performing the SBAS process on Sentinel-1 SLCs? - Added by Jiaqing WANG 10 months ago

Hi，

I use the following command to generate the two figures.

visdt_pwr.py test.unw test.mli 2000 -c -3.14 3.14 -d "atmospheric delay" -m rmg -b -u test.png

You need to replace "test.unw test.mli 2000" with your own file names and width.

Regards,
Wang

RE: How to mitigate turbulent signals in interferograms when performing the SBAS process on Sentinel-1 SLCs? - Added by Redmine Admin 9 months ago

Am 06.03.24 um 08:47 schrieb TARIQASHRAF:

Thank you so much for your kind response but i think its a python script which i donot have. Thanks for responding though

Thank you so much Igor Babayants for your valueable insights.

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