SSTV — Slow-Scan Television.
Sending still images over the air, one slow line at a time. The International Space Station transmits it sometimes.
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Related words
- CW — Continuous Wave. Morse code.
- Frequency — How fast a radio wave oscillates.
- APRS — Automatic Packet Reporting System.
- SSB — Single Sideband. HF voice.
- FT8 — A weak-signal digital mode.
- CTCSS / PL tone — A sub-audible tone that opens a repeater.
- K index — How disturbed the earth's magnetic field is.
- Ionosphere — The layer that bounces HF signals back to earth.