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

[mismail2010]

I am beginner, how can I calculate PS of S1 using ESA NEXT or ENVI?

[ABraun]

This is a very good start: How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP 5

[gabrielaquintana77]

Hi Dear Andreas, what is wrong ??? The stack is not with pairs???

[ABraun]

@gabrielaquintana77 I haven’t tried it but this seems more reasonable.

NOTE: In case of several Stacks export each Stack and then copy results to the directories (/diff0 and /rslc), no need to copy for (/geo, /dem).

[bayzidul]

Hi @gabrielaquintana77, I think @ABraun is right and I had also avoided Stack Averaging.

[annamaria]

I had problems with the reapeted use of graphs in Snap for create stack for time series. I don’t know if someone else have dat the same problem.
Please, take a look.

Problems with the reapeted use of graphs

Dear all, I had problems with the reapeted use of graphs in Snap. I have built a graph (actually a series of graphs, but I have the same problem for all graphs, so for simplicity, I will only talk about one) to prepare a stack for time series with StaMPS. The processing of this graph has proceeded without problems and the results were correct, so I managed to process the time series without problems and also I got reasonable results. In my test, I needed to process the same stack, but wi…

[FilippoIodice92]

Hi @ABraun, I have followed the suggestion of @bayzidul. But when I export it , it gives an error

I even tried the sequence master_Stack_ifg_dinsar and master_Stack ifg¬dinsar_Deb. But the result are the same.

Can you help me?
Filippo

[ABraun]

From you screenshots I saw that you created a subset. At which step was this done and why didn’t you use the TOPS Split function to reduce the image size?

[bayzidul]

Hi @FilippoIodice92
Which version of SNAP are you using and which platform? I had also faced this problem before but when I used SNAP 5 in Linux, I could do the export for a single pair. Maybe restarting SNAP or updating plugins can solve your problem. You have to subset after the final step, especially after debursting. It is of course not possible to process data without Splitting (W1 - VV and so on).

[gabrielaquintana77]

Hi @bayzidul @ABraun

I followed the steps of @katherine, but these give me a error when I go export to StaMPS

[gabrielaquintana77]

@bayzidul @ABraun

Following the steps from @annamaria I must rename the images?

[annamaria]

yes.
usually this error appears when names are different. do you use snap 6.0 beta version or 5.0?

[gabrielaquintana77]

Hi @annamaria, I have SNAP 5.0, but I readed in others comments that the error indicate that I have make EAP Phase Correction? this is right? or only to rename?

Thanks for advance

[gabrielaquintana77]

Hi @annamaria

I tried make of the EAP phase correction, but I got this following message

[ABraun]

did you perform “TOPS coregistration with EAP” before?

[gabrielaquintana77]

Hi @ABraun I am trying folllow the steps from @Sharon now and, @katherine @annamaria @falahfakhri @bayzidul, you talks about S1 ESD Coregistration???

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

Dear all, I have successfully export the data for stamps by following step: Split and Apply_Orbit_File ==> Apply the EAP correction that sensed before March 2015 ==>Coregistration-S-1Backgeocoding ==> Interferogram formation ==> Deburst ==> TopoPhase Removal ==> Add elevation band ==> StaMPS Export But I only got three folders - diff0、geo、rslc. I didn't get the folder of "dem". Could anyone help me? Thank you very much!

[ABraun]

Sorry, this was the only reason I could think of that could cause this error message. I know it doesn’t fit to the workflow that is currently discussed here but sometimes data gets confusing if you work on it over various days.

[gabrielaquintana77]

Sorry, this was the only reason I could think of that could cause this error message. I know it doesn’t fit to the workflow that is currently discussed here but sometimes data gets confusing if you work on it over various days.

You are right!!! I am very confused with all this steps !!!

[ABraun]

I think the most complete list of steps including all findings in this topic (which became quite confusing!) was given by @bayzidul here: How to prepare Sentinel-1 images stack for PSI/SBAS in SNAP 5

Thanks again for that!

[gabrielaquintana77]

Thanks @ABraun , I go, this time with Bayzidul again!!!