Extra exam question E3B03
Subelement E3, RADIO WAVE PROPAGATION· Group E3B
At what time of day is transequatorial propagation most likely to occur?
- A.Morning
- B.Noon
- C.Afternoon or early evening (correct answer)
- D.Late at night
WhyTransequatorial propagation is most likely to occur in the afternoon or early evening. Transequatorial propagation is most likely in the afternoon or early evening, when ionization along the geomagnetic equator, enhanced by the day's solar heating, is at its peak for this particular mode, answer C. Morning and midday haven't built up the necessary ionization yet, and by late at night the ionization needed to support TEP has typically decayed.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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