Radar / Coregistration / Create Stack

ulisses-guimaraes · January 20, 2026, 11:04am

I am trying to merge features extracted from Sentinel 1 using the Create Stack, but it is not working. There is an error saying:

[NodeID: Create Stack] Cannot invoke “org.esa.snap.core.datamodel.Band.getUnit()” because “mstBand“ is null

diana_harosa · January 20, 2026, 1:21pm

The fix for this issue should be available in the Microwave 13.0.2 update. Kindly update SNAP by selecting Help → Check for Updates :

ulisses-guimaraes · January 20, 2026, 1:28pm

Thanks for answering. Actually, my snap is the latest version with microwave toolbox at 13.0.2. It is curious bcause the Snap toolbox at 12 version, this process works smoothly. My problem ocurrs just in the 13 version.

diana_harosa · January 21, 2026, 7:57am

Jira ticket SNAP-4139 created.

jlu · January 21, 2026, 4:27pm

Here is a workaround. Before you run the CreateStack operator, you can manually change the unit of both the master and slave bands to “intensity”. For example, you have two products (master and slave). The first band in the master product is Sigma0_IW1_VH with a unit of intensity. The slave band is coherence with a unit of “coherence”. Now you can change the unit of coherence band to “intensity” by right-clicking on the band name and select “Properties” and change the unit in the pop-up window. Basically you should make your feature bands have the same unit as the master band. Then you should be able to run CreateStack.