Dear @ABraun,
Unfortunately the problem remains whether topography removal is performed in one step (checked box) or two steps. The following figure is from one step process (only elevation band can be calculated).
In fact, as already discussed in ALOS SLC L1.1 interferometry processing parameters, even trying with higher orbit interpolation degrees, results are awkward, don’t you think? I would have thought that the 5th “orbit interpolation degree” could be safely selected in every processing (results should be more accurate than using for eg 3rd orbit interpolation degree). Now, it seems that a major problem apart from the orbit precision, is related with the topography removal tool… Is this a SNAP processing error or I should try something else?