Extra exam question E3A11
Subelement E3, RADIO WAVE PROPAGATION· Group E3A
What is a typical range for tropospheric duct propagation of microwave signals?
- A.10 miles to 50 miles
- B.100 miles to 300 miles (correct answer)
- C.1,200 miles
- D.2,500 miles
WhyTropospheric duct propagation of microwave signals typically extends from about 100 to 300 miles. Tropospheric ducting of microwave signals typically extends propagation out to somewhere in the range of 100 to 300 miles, well beyond normal line-of-sight range but nowhere near the thousand-mile-plus distances associated with ionospheric skip, answer B. The shorter 10-to-50-mile range undersells typical duct performance, and the 1,200- and 2,500-mile figures are far beyond what tropospheric ducting alone achieves.
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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