APRS — Automatic Packet Reporting System.
Radios beacon their position and short messages, which get relayed to the internet. Useful for tracking, weather data, and messaging.
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Related words
- Simplex vs duplex — One frequency versus two.
- K index — How disturbed the earth's magnetic field is.
- SSB — Single Sideband. HF voice.
- Propagation — How your signal travels.
- Sporadic E — Sudden short-lived openings.
- FT8 — A weak-signal digital mode.
- Wavelength — The physical length of one radio wave.
- CW — Continuous Wave. Morse code.