Workflow between SNAP and StaMPS


#1

Dear Luis, I appologise - I do not want to push you somehow as I really understand how hard your work is! I would like just to have some information to make plans. Is there any success in creating a workflow between SNAP and StaMPS which you mentioned before ? Can we hope to have it in the nearest future?
Thank you for all your help
Katherine


PSINSAR in SNAP
SBAS Interferometry
Urban subsidence steps( wok flow) with sentinel 1 or radarsat data
"Landslide deformation analysis"
Processing a stack of SLCs rather than individually?
SBAS connection graph
#2

Katherine, we have now a StaMPS Export which combines the coregistered stack, interferograms and DEM and writes them in Gamma format into the folder structure accepted by StaMPS. It’s been difficult to do without a specification of the Gamma format. We still need a lot more testing. We could provide you with an early release of the software so you could test it too.


#3

Hi @lveci
thank you, these are great news. I would be very interested in this preliminary version, too!
Maryse


#4

Thank you Luis! It will be great if you could provide me with an early release. I will be very glad to be helpful in testing the software.
Katherine


#5

That’s great news. Can I apply for early release too?
Jaroslav


#6

Dear Luis,
I apologies again for disturbing you - I do understand how many different things you have to do at the same time! About a fortnight ago you kindly suggested to provide me with an early release of workflow from SNAP to STAMPS for testing. I just want to have some info for making plans. When it will be possible?
Thank you for all your help
With best wishes, Katherine


#7

Hello,lveci ,can i supply an early release of the software too,i want to test too.thank you very much! my email is 875340007@qq.com


#8

Hello Luis,

Thank you very much for your effort. Could you please send me a pre-release version of the toolbox? I would like to test that function, too.

Thank you!


#9

+1

… (20 character limit) :wink:


#10

The StaMPS export in SNAP 5.0 works fine to me.
It creates three folders:

  1. the interferograms
  2. the DEM
  3. the coregistered stack

If I understood it right, this skips the chapters 3-5 in the StaMPS manual and now we can directly proceed with Matlab.

I installed matlab and wanted to apply the scripts provided within STAMPS to the generated output:

There is a great tutorial by Dr. Mahdi Motagh from the SAR summer school 2016:
http://sar-edu.uni-jena.de/wp/downloads-2/ (download ‘Time Series’) and open "SAR-EDU_stamps_Motagh.pdf)

But I must do something wrong. Is anyone experienced with the selection and analysis of persistent scatterers and how to apply it to the data exported by SNAP?


#11

Currently SNAP only produces the inputs required by StaMPS. You need a stack with at least 4 interferograms. Running stamps automatically doesn’t seem to be enough to get a good result for any scene. People familiar with StaMPS have said it needs adjustments at the various steps. I’m not knowledgeable on PSI to recommend how to use StaMPS. Next we need to figure out how to make use of the data produced by StaMPS back in SNAP.


#12

thanks for the answer.
I have a stack with 8 SLCs (7 interferograms). I could imagine that there are some variables with need to be adjusted within the StaMPS workflow (I had a look at the MATLAB scripts), but I already struggle adressing the exported data.
Maybe someone has already worked with StaMPS and can test how to use the SNAP exports.


#13

8 images is a very small stack for PS identification, usually 20+ scenes are used/recommended. Perhaps the people on StaMPS-forum could help:

https://groups.google.com/forum/#!forum/mainsar


How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP 5
#14

thanks, mengdahl, I’m fully aware of that. The thing is that I wanted to test the technical application before I create a monster stack :slight_smile:

But the forum is a great hint, I didn’t know it yet!


#16

Hello ABraun,
I tried to export to StaMPS the stack of four S-1 images with corresponding interferograms. But got an error. Could you, please, share your experience with export. What do I do wrong? Below are my graphs. I have used for some time StaMPS so probably when I overcome export from Snap to StaMPS it may go smoother.



#17

For S1, you need to apply orbit and TOPS split.
Then you can add all products to the backgeocoding.
Create a stack of interferograms on the resulting stack.
Deburst both the backgeocoded stack and the interferogram stack.
Add an elevation band to the interferogram stack.

Add debursted stack and debursted interferogram stack to the stamps export.

I could update the stamps export to allow multiple individual interferograms. This would allow you to choose slave-slave pairs.


How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP 5
How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP 5
How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP 5
#18

Hi Luis,
It seems I have done everything you said. Could you, please, have a look at my graphs. Thank you very much for your time.
Katherine


#19

I used Envisat data so no debursting ect was needed, sorry.
I created:

  1. One stack containing 8 SLCs
  2. One interferogram product as produced by the interferogram module containing one interferogram per slave image
  3. An elevation band added to the interferogram stack by right-click > add elevation raster.

#20

Dear ABraun,
Thank you very much for your answer. My main target is to work with S-1 images. Mostlikely it is no need to use SNAP export to StaMPS with Envisat images as Stamps is adjusted for Doris. So Doris in this case is much better.
Thank you again for your wish to help.
Katherine


#21

Dear Luis (or probably somebody from the community who already tried this function),
Thank you for your explanations - I managed to move a little bit forward. I tried to export to Stamps all interferograms (Orb_Stack_Ifg_Deb and resampled images (Orb_Stack_Deb) from my stack at once - that was my mistake. When I tried to export only two Products at the same time (resampled image 0604_Orb_Stack_Deb and the ifg of this image with the master 1107_0604_Orb_Stack_Ifg_Deb) I got the new error


But I do not see such a band in this Product. Could you, please, give me an advice how to overcome this.
Thank you very much for all your help
Katherine