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
- Wavelength — The physical length of one radio wave.
- Propagation — How your signal travels.
- Simplex vs duplex — One frequency versus two.
- Frequency — How fast a radio wave oscillates.
- Gray line — The band of twilight moving around the earth.
- SSB — Single Sideband. HF voice.
- FT8 — A weak-signal digital mode.
- Watts — Transmit power.