S1 TOPSAR Interferometry on S1TBX - Further improving interferogram coherence

[mauleon.fb]

Yes I would be eager and excited as well to know what was done on the process to achieve the results shown on the paper…and it would help as well to note in future processing of insar

I hope @mfoumelis can help us on this

@dsmilo where in the process should subset be done if using TOPSAR data? i think it can be done after interferogram formation and debursting am i right?

@ABraun well yours still show bigger fringes than mine. Mine looks grainy rainbow coloured in all images

[ABraun]

@ABraun well yours still show bigger fringes than mine. Mine looks grainy rainbow coloured in all images

I filtered and multi-looked as described in the report.

[dsmilo]

Check out this tutorial to help get you started:

http://step.esa.int/main/doc/tutorials/

This should be your first step. Then coregister…ect…

If you perform a subset after coregistration or even interferogram, you are essentially clipping or cropping the image to make it smaller, not really performing a true subset.

[yzxtll]

@dsmilo

Did you check the modeled coherence after coregistration?

However,after coregistration(Radar>Coregistration >S1 TOPS Coregistration with ESD),it has stacked into a single file,how can I run stack overview?Thanks

[ABraun]

If you have multiple single files, you use the InSAR Stack Overview from the menu (Radar > Interferometric > InSAR Stack Overview)

If you have already coregistered them, you can load the InSAR Stack tool (under View > Tool Windows > Radar > InSAR Stack)
The single tabs will show you the baseline information as well.

[yzxtll]

@ABraun

coregister

Thanks a lot ,here are more question:what’s the differnece between the menu of coregistaton>Stack Tools>Create Stack and Interferometric > InSAR Stack Overview ,which is both sub-menu of Radar in SNAP7.0?

[ABraun]

create stack is for geocoded rasters, coregistration is for SAR products in slant range geometry

Co-registration of Various Products from Different Satellites

let me try to summarize it: if you have only two datasets and both are well geocoded, collocation is sufficient. if you deal with multiple rasters and all are well geocoded, you can use create stack. if you deal with data acquired from different sources or angles or you have terrain-induced distortions (often the case for radar data) you need coregistration to match the rasters precisely at the sub-pixel level. This is also required for interferometric analyses Please, anyone feel free to com…

[yzxtll]

so late for thanks to you,now I’m interesting in PSI of how to pickup the unusuall shift trend of PS candidates and ingoring normal PS candidates ,then visualize them,Could you give me more suggestions ?

[ABraun]

could you please explain a bit more what you mean by “pickup the unusual shift of PS candidates and ignoring normal PS candidates”?