Distância de transmissão e altura da antena

How to calculate the transmission distance and antenna height of the transmitter and receiver? The table below is from our engineer.

Distância de transmissão (km)	the sum of Antenna heights required To break through the curvature of the Earth (metros)
10km	7.8 Medidor
20km	31.4 Medidor
25km	49.1 Medidor
30km	70.6 Medidor
35km	96.1 Medidor
40km	125.6 Medidor
50km	196.2 Medidor
60km	282.5 Medidor
70km	384.5 Medidor
75km	441.4 Medidor
80km	502.3 Medidor
90km	635.7 Medidor
95km	708.2 Medidor
100km	784.8 Medidor
110km	949.5 Medidor
120km	1130.0 Medidor
130km	1326.2 Medidor
140km	1538.0 Medidor
150km	1765.6 Medidor

Se eu quiser transmitir 100 kilometers but don’t want the drone to fly too high, what is the solution? Neste momento, you can consider adding a drone relay. Solução de relé repetidor de drone

Fresnel Zone Calculator

The Fresnel Zone Calculator can be used to calculate the size of the elliptically shaped area of RF propagation between a transmit and receive antenna, also known as the Fresnel zone.