Question

Which of the following layer is used for long distance sky wave propagation during night hours?

(a) F layer

(b) E layer

(c) D layer

(d) All layers can be used

I have been asked this question at a job interview.

Query is from Radio Wave Propagation in section Radio Wave Propagation of Antennas

Answer 1

Correct choice is (a) F layer

The explanation: F layer is the top layer in the ionosphere and is also present at the night time. So it is used for the long distance sky wave propagation and also its ionization density is high. D layer is not present during night hours.