Extra exam question E3B11
Subelement E3, RADIO WAVE PROPAGATION· Group E3B
At what time of day is sporadic-E propagation most likely to occur?
- A.Between midnight and sunrise
- B.Between sunset and midnight
- C.Between sunset and sunrise
- D.Between sunrise and sunset (correct answer)
WhySporadic-E propagation is most likely to occur during daylight hours, between sunrise and sunset. Sporadic-E propagation is most likely to occur during daylight hours, roughly between sunrise and sunset, tracking the same daytime pattern as the E-region ionization it depends on, answer D. It isn't concentrated in the overnight hours between midnight and sunrise, between sunset and midnight, or across the sunset-to-sunrise span generally.
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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