Interested in improving InSAR analysis over distributed scatterers? Two new resources introduce the Phase Linking approach in the SNAP Microwave Toolbox, combining practical guidance with an explanation of the underlying concepts.
🔹 InSAR Phase Linking – Hands-on Tutorial
Follow a step-by-step workflow using Sentinel-1 data to improve coherence over natural surfaces and map earthquake-related ground deformation, with examples in SNAP Desktop and command-line processing.
🔹 Phase Linking – Explained
Understand how Phase Linking estimates consistent phase information across multiple SAR acquisitions and why this approach is useful for distributed-scatterer InSAR analysis.
Explore the resources and see how Phase Linking can support your InSAR workflows in SNAP!
Title: gpt: “Unknown operator ‘PhaseLinking’” in SNAP 14.0.2, but the operator exists in the Microwave Toolbox jar and in the SNAP GUI
System: SNAP 14.0.2 on Windows, Java 21.0.6 (gpt --diag: SNAP Release version 14.0.2).
Hello @diana_harosa, great work on the release of SNAP 14.
I have tried the Phase Linking but encountered an issue.
The Phase Linking operator (Radar > Interferometric > Phase Linking) is available in the SNAP desktop application and in Graph Builder, but gpt does not know it:
gpt.exe PhaseLinking -h
Unknown operator ‘PhaseLinking’.
What I checked:
The operator is installed and registered in the jar, but gpt does not load it. Is this a known problem in 14.0.2, and is there a fix or a workaround for gpt (command line / batch processing)?
Regards.
Dear Fakhrul,
I did a quick check on my SNAP installation, and
PhaseLinkingappears in the list of available GPT operators:Also, running
gpt.exe PhaseLinking -hsuccessfully displays the operator’s help:This suggests that the operator is accessible through GPT, at least in my installation.
Have you tried running
gpt.exedirectly from thebindirectory of your SNAP installation? If that still doesn’t work, the issue might be related to an inconsistent SNAP installation. You could try reinstalling the module updates or, if that doesn’t resolve the issue, reinstalling SNAP and checking whether the operator is then correctly recognized by GPT.