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


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


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

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