first at all, I have to say that I'm new GRASS user.
I would like to make a pansharp in GRASS 7 with reflectance Landsat 8 bands. I have revised some related posts and blogs, and I didn't find out if it is possible to make a pansharp after in reflectance bands.
It seems that i.pansharpen only works with 8-bit data, however, Landsat 8 is delivered in 16-bit.
Is it necessary to do a r.rescale with reflectance Landsat 8 data before pansharpening?