Extra Class

Where is transequatorial propagation (TEP) most likely to occur?

What is the approximate maximum range for signals using transequatorial propagation?

At what time of day is transequatorial propagation most likely to occur?

What are “extraordinary” and “ordinary” waves?

Which of the following paths is most likely to support long-distance propagation on 160 meters?

On which of the following amateur bands is long-path propagation most frequent?

What effect does lowering a signal’s transmitted elevation angle have on ionospheric HF skip propagation?

How does the maximum range of ground-wave propagation change when the signal frequency is increased?

At what time of year is sporadic-E propagation most likely to occur?

What is the effect of chordal-hop propagation?

At what time of day is sporadic-E propagation most likely to occur?

What is chordal-hop propagation?

What type of polarization is supported by ground-wave propagation?

What is the cause of short-term radio blackouts?

What is indicated by a rising A-index or K-index?

Which of the following signal paths is most likely to experience high levels of absorption when the A-index or K-index is elevated?

What does the value of Bz (B sub z) represent?

What orientation of Bz (B sub z) increases the likelihood that charged particles from the Sun will cause disturbed conditions?

How does the VHF/UHF radio horizon compare to the geographic horizon?

Which of the following indicates the greatest solar flare intensity?