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InSAR Scientific Computing Environment version 2
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Coregistration error for CSK with stackStripMap.py #345

Closed lsbts closed 2 years ago

lsbts commented 3 years ago

Hello,

I'm trying to process a stack of Cosmo-SkyMed images (around 100 SLC images), to get the interferograms for each pair of dates. At the moment, I've tried to do that with 4 dates, but I have a problem in the coregistration of the images.

I follow the stripmapStack README. However, the coregistration appears to be off by several pixels. Below are the 2 images visualized with mdx.py, with a couloured composition (red channel is reference date, blue and green channels are the coregistered date):

stackstripmap_color The problem is similar with the other dates, they are all badly coregistered with the master date (and among them too).

I launch the program with

stackStripMap.py -s ./SLC -d ./DEM/demLat*.dem.wgs84 -u snaphu --nofocus --working_directory ./working_dir --workflow interferogram

I do not have this problem with the application stripmapApp.py , as the coregistration is good. As seen below, the 2 dates are well coregistered (color code is the same as above):

stripmap_color

Do you have any idea to correct the coregistration problem I have with stackStripMap.py? I did not see any parameter related to the coregistration with stackStripMap.py --help, but maybe I am missing something here?

Thank you,

piyushrpt commented 3 years ago

Probably need the -z flag a well in the prep stage to inform the script that the SLCs are in zero doppler geometry.

lsbts commented 2 years ago

Probably need the -z flag a well in the prep stage to inform the script that the SLCs are in zero doppler geometry.

Thank you @piyushrpt , that is the solution!