I read a couple of threads in which users like @clardeux (Link) or @mbrady (Link) said that is possible to export the incidence angles with the BandMath operation. But they don´t explain how they did it. Could anyone explain it to me please?
When exporting to other formats you will need to have the data as a raster band. In the band maths you could create a new band and in the expression just put the name of the incidence angle tie point grid. This will create your new raster band. You can then export the new band to whatever format.
Now I get it. Thank you very much lveci!