This can happen in SNAP 7 because of bug.
[SNAP-662] Collocation creates wrong valid pixel expressions in certain cases
This will be fixed with the next release (not far away).
In this post a work around is mentioned:
This can happen in SNAP 7 because of bug.
[SNAP-662] Collocation creates wrong valid pixel expressions in certain cases
This will be fixed with the next release (not far away).
In this post a work around is mentioned: