How does the radio altimeter reading change with the bank angle?
Let's say, we're flying at 1000' AGL and a bank angle of 0° above a endless flat surface. The radio altimeter shows 1000' as well.
Now if we roll to either side to a bank angle of 10° and maintain 1000' AGL, what does the radio altimeter read now?
Does does the radio alt increase accordingly or is the radio altimeter adjusted to always face down?
I'm especially interrested in the way how Airbus handles this situation.