S-1 ESD operator java lang Exception Executor already shutdown!

the longer the time series, the lower is the coherence of pixels, because it is computed over a large range of images (potentially containing changes). Long periods will give you less PS but the remaining ones have a very stable information and will contain only little noise. So I wouldn’t recommend splitting unless you want to separate the analyzed periods.

But maybe you can create three stacks in SNAP and then apply the StaMPS export into the same target directory in the end.

This seems like a good idea. But let me first re-install the software, because the process has constantly failed since ESD. I cannot go forward from ESD because of the error (Executor Already Shutdown). This error has persisted for both big and small stacks. I will let you know what happens after re-installing.