How to get a geotiff as an output?

Hello,

The output processed S1 images are given either in.hdr or .img.
But I would like to concatenate S1 and S2 bands later so I need a .tif.
How can I do this?

The BEAM DIMAP format is organized in a way that all bands are stored as separate imgs.

You can first collocate the two products as suggested in this tutorial Synergetic use of S1 (SAR) and S2 (optical) data and use of analysis tools

and later export a GeoTiff of the output if you need the bands all in one raster file.

Thanks for your answer