Old tecnology and inertia - transponders

On Feb 25, 10:54 am, "
wrote:
snip
than one would suspect since distance is based on signal strength
only and there is no one position on an aircraft for mounting the
antenna. If it is mounted on a metal aircraft in a prominent position
I am sure the efficiency is greater than say on my DG where the
antenna is mounted inside the cockpit above the instrument panel.

My understanding is that distance is calculated based on timing of the
reply and not signal strength, and as such, is pretty accurate.

Ramy