I have the same snaphu import export problems as described in this section and would like to share my list of problems in hopes to find a solution for them. I used the SNAP toolbox to process (coreg_ifg_deb_dinsar_flt) two images of the sept 2015 Chile earthquake (20150731 and 20150917, IW3, Rel orbit 156).
- I usually run the SNAPHU export and other SNAP processes on the SNAP 2.0 beta-07 toolbox (installed on a 16 GB RAM (Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40 GHz, 2 processor) computer with 64-bit windows 7 system.
- The snaphu unwrapping on a VM on this computer never worked. Out of memory and my computer froze each time.
- I am now trying the snaphu unwrapping on another 32 GB RAM, 8 processor system (Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60 GHz) with a 64 bit Windows 7 operating system where I have a UBUNTU Virtual machine configured to use 30 GB RAM and 4 CPUs processors.
- Snaphu unwrapping using MST goes on for days and days without stopping, and the snaphu unwrapping using MCF stops after 2-3 seconds with a 'OUT OF MEMORY' error.
Is increasing the RAM or dividing the subswath image the only solution? And if yes, how much should the RAM be increased to? For me, even 32 GB does not seem to be enough.
Having said that, I must also point out that I once cancelled the snaphu unwrapping (MST) after 2 days and tried importing the hdr product into the SNAP toolbox. This did not work, and after reading this section, I tried the snaphu import of the same product in the S1-toolbox. This worked, but of course, the snaphu unwrapping was extremely coarse but atleast now I know that the unwrapping with MST ran for a short while before encountering a memory problem and freezing.
I would appreciate it if the other people who had similar problems could share their solutions, whether it is increase in RAM, processor, VM configuration etc.
Thanks for taking time out to read this!