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E3Edit

The E3 section of the Amateur Extra test contains information on radio wave propagation.

E3AEdit

The E3A section covers propagation and technique: Earth-Moon-Earth communications (EME), meteor scatter.
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E3BEdit

The E3B section covers propagation and technique: trans-equatorial, long path, gray-line; multi-path propagation.
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E3CEdit

The E3C section covers propagation and technique: aurora propagation selective fading; radio-path horizon; take-off angle over flat or sloping terrain; effects of ground on propagation; less common propagation modes.
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