Hi, I’m not using this account anymore. See here: Farewell & Welcome SNAP Community - meta - STEP Forum (esa.int)
Regarding your question. I guess it is about the UMBRA dataset you have mentioned here already: Pixel Information in Exported TIFF File - s2tbx - STEP Forum (esa.int).
I don’t know this format and I’m not sure if a simple conversion is sufficient. You are converting it to XML, but which format are you following. I’m not sure if your problem can be solved this way.
Can you provide more details?