Sporadic E — Sudden short-lived openings.
Patches of intense ionization that make 6 and 10 meters open without warning, mostly in early summer. It is why 6 meters is called the Magic Band.
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Related words
- CW — Continuous Wave. Morse code.
- Ionosphere — The layer that bounces HF signals back to earth.
- FM — Frequency Modulation. VHF and UHF voice.
- SSTV — Slow-Scan Television.
- Frequency — How fast a radio wave oscillates.
- Solar flux — A number that tracks solar activity.
- Propagation — How your signal travels.
- Gray line — The band of twilight moving around the earth.