Question

The take-off angle for the curved earth surface is given by ____

(a) β = 90 – θi – 57.3d/2R

(b) β = 180 – θi

(c) β = 180 – θi – 57.3d/2R

(d) β = 90 – θi

I have been asked this question in an online quiz.

I need to ask this question from Multi Hop Propagation topic in portion Virtual Height, Critical Frequency and Muf of Antennas

Answer 1

Correct choice is (a) β = 90 – θi – 57.3d/2R

To explain I would say: The take-off angle for the curved earth surface is β = 90 – θi – 57.3d/2R

Take-off angle for the flat earth surface is β = 90 – θi