87,06 m Formula (*) : Distance = H / tang ( HPBW / 2 ) H = = Height of antenna from the ground (m) HPBW = Vertical half-power half-power beamwidth beamwi dth (deg) Example: 70º (HPBW) / 2 = 35 tang(35) = 0,7002 Distance = 60,96 m / 0,7002 = 87,06 m (*) This formula is for level terrain calculations only.