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T3C09:What is generally the best time for long-distance 10-meter band propagation via the F region?

T3C09T3C

What is generally the best time for long-distance 10-meter band propagation via the F region?

Direct answer summary (2026-2030 NCVEC pool)

The official correct answer for T3C09 is From dawn to shortly after sunset during periods of high sunspot activity.

The key fact is From dawn to shortly after sunset during periods of high sunspot activity. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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More questions in T3C

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