Originally Posted by
aterpster
Mr. Opti:
I can only speak for US ATC en route radar, which are the same as USAF radar. They paint out to 200 n.m. Would an airplane at FL 350 be over the horizon at 200 miles?
No
The rule of thumb we used was radar horizon = 1.23 x (sq rt of the height) [for sea level to aircraft height]
Last edited by MFC_Fly; 9th Mar 2014 at 13:45.
Reason: Clarify heights