Hello folks,

I was reading this website:
http://www.qsl.net/aa3rl/ant2.html. It got me thinking. In
general, does the term "above ground" refer to the actual Earth ground
or does it refer to an antenna's ground plane (not necessarily Earth
ground)?

I was looking at the radiation patterns, and I got curious what would
happen if a dipole antenna is attached to a bird (for example). Will
the radiation pattern change as the bird's flying height changes? Or
will the flying antenna maintain the same radiation pattern as a
"normal" antenna that is mounted on a mast at the same height?

Thanks!