When installing a long-distance point-to-point radio frequency communication link, if the distance between the transmitting and receiving antennas exceeds how many kilometers, the influence of the curvature of the earth needs to be considered?

When installing a long-distance point-to-point radio frequency communication link, if the distance between the transmitting and receiving antennas exceeds how many kilometers, the influence of the curvature of the earth needs to be considered?
A . 3.3km
B . 5.3km
C . 7.3km
D . 11.3km

View Answer

Answer: D