APRS Internet System (APRS-IS): Like most other Ham radio systems, APRS has been fully integrated with the internet beginning with the efforts of Steve Dimse and the Sproul Brothers in 1997.

APRS Internet System (APRS-IS): Like most other Ham radio systems, APRS has been fully integrated with the internet beginning with the efforts of Steve Dimse and the Sproul Brothers in 1997.

ASTARS stands for APRS Satellite Tracking and Reporting System and refers to digital relay satellites and the global APRS internet linked system of ground stations that tie it all together into full time 24/7 …

Many popular APRS systems, unfortunately, use a constant transmission rate of X packets every Y period of time which results in a DOUBLING of QRM (over 480 packets) being generated

Until now. This specification defines the APRS on-air protocol with a precision and clarity that make it a model for future efforts. The work done by members of the APRS Working Group, as well as …

A good state web page is a start. . A good group of volunteers helps. . And providing relevant information will help the rest of ham radio learn how resourceful APRS can be. . This combined with …

Aug 24, 2010 · It is entirely reasonable to set up a crossband Regional APRS Voice Alert system, so that you can call ALL APRS Voice Alert mobiles over large areas, not just simplex.

RECEIVING APRS on TH-78 and FT-51R RADIOS: Not only the new Kenwood and Yaesu APRS radios, but also both the Kenwood TH-78 and Yaesu FT-51R radios back in the 1990's had a …

The diagram below are some ideas on the ultimate APRS digipeater. All information is available to the mobile operator on 144.39 (or other national freq). But all local user inputs are moved over to an …

It not only listens for APRS messages formatted via Touch Tones and converts them to APRS packets on 144.39, but it also listens for PL tones on the input of the repeater.