>>412
As
>>415
said, it's almost certainly for a microwave link and not broadcast FM. Microwaves are where RF starts to get a little closer to ionizing radiation - There's a lot of debate right now as to whether or not they cause negative effects beyond the thermal heating, and even as to how dangerous the thermal heating really is.
My personal take is that as long as you don't linger too long on the shiny side (opposite of where the photograph is taken) and you don't feel any obvious effects from the RF while you're there, you're almost certainly safe.