SNAP - StaMPS Workflow Documentation

[thho]

I agree with @mdelgado, the topic you are looking for was discussed e.g. here

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

Hi @gabrielaquintana77, you have got a message but in short, I think during preprocessing (I suspect the Apply Orbit File OP but I was not able to reproduce the error and therefore I can not prove it) went something wrong which leads to 0 mean amplitude, which means that all pixels in the scene do have 0 as amplitude value, which is not possible at all (its about amplitude and not phase, because in this step StaMPS uses an amplitude dispersion index to preselect PS candidates. The Index is D_A=s…

and here

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

Hello @Fikretjfm, It is a late response but maybe it is still helpful for you, and maybe it will be helpful for others. I just got the same error index out of bounds because size(ij)=[0,0]. I recognized that one scene was not processed properly. I noticed it during the mt_prep_gamma_snap step before entering matlab: [image] The scene of 2017 Nov 08 seems to have zero mean (see the WARNING message in terminal), which is highly suspicious. I had a look at the stack in SNAP and all bands of thi…

If there are more cases of zero mean amplitude it is worth redoing the preprocessing in SNAP, this always solved the issue. I highly recommend checking the results after each preprocessing step to figure out such problems, since they often appear in the first steps.