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APRS

Reading time: less than 1 minute

APRS is a packet radio system used in Amateur radio that can be used to broadcast position, weather and small text messages.

Frequencies

Frequency	Region
144.39 MHz	North America
144.575 MHz	New Zealand
144.64 MHz	China, Taiwan
144.66 MHz	Japan
144.80 MHz	Europe

APRS-IS

APRS-IS is the APRS Internet System. It is a system that relays APRS messages over the internet.

Reading the firehose

Connect to the APRS-IS server, send user 0 pass -1\n to authenticate as a guest. And then data will start flooding, read line by line.

You will want to occasionally send ping\n to keep the connection open.

Useful links

http://www.aprs.org/
https://en.wikipedia.org/wiki/Automatic_Packet_Reporting_System
https://aprs.fi/
https://www.febo.com/packet/layer-one/transmit.html

The following pages link here

2023 05 08

Citation

If you find this work useful, please cite it as:

@article{yaltirakli,
  title   = "APRS",
  author  = "Yaltirakli, Gokberk",
  journal = "gkbrk.com",
  year    = "2025",
  url     = "https://www.gkbrk.com/aprs"
}

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IEEE Citation

Gokberk Yaltirakli, "APRS", October, 2025. [Online]. Available: https://www.gkbrk.com/aprs. [Accessed Oct. 30, 2025].

APA Style

Yaltirakli, G. (2025, October 30). APRS. https://www.gkbrk.com/aprs

Bluebook Style

Gokberk Yaltirakli, APRS, GKBRK.COM (Oct. 30, 2025), https://www.gkbrk.com/aprs

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