Generating DEM from Sentinel 1 using SNAP 9.0

Dear step esa forum,

I got an error when I tried to apply S-1 Enhanced Spectral Diversity after applying S-1 Back Geocoding. When I used two bursts or one burst, the error still occurred. I am using SNAP 9.0. The error appeared as follows (attached picture):

“A problem occurred during the target product processing.
Type: OperatorException
Message: Java heap space”

Could you please let me know how to deal with this issue?

One more thing, I would like to ask if DEM from S1 is suitable for urban areas with the building as well as water bodies.
Your help is highly appreciated. I look forward to hearing from you.

Best regards

Dear Sokneth,

There is an entry in the FAQ which covers your question regarding the heap space error:
SNAP FAQs - SNAP - Confluence (

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