Use of mask

Hi all,
I have a problem with the masks. I have two S1 products and one S2. I full processed the three products (which included a reprojection of the data in the same epsg). Then I created a snow extent mask by using S1 and I’d like to apply it on the S2. I cannot find a way to perform the last step, while it is extremely easy in any GIS.
Does anyone knows a solution or a workaround?


This tutorial explains how to translate masks between different products:
Synergetic use of S1 (SAR) and S2 (optical) data and use of analysis tools

Thanks a mil for pointing out. Actually it’s more complicated than in a GIS software but it works.