APRS is now in its 21st year! APRS is digital communications information channel for Ham radio. As a single national channel (see map at right), it gives the mobile ham a place to monitor for 10 to 30 …

APRS is now in its 25st year! APRS is digital communications information channel for Ham radio. As a single national channel (see map at right), it gives the mobile ham a place to monitor for 10 to 30 …

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 …

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

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 …

Not only can these APRS radios convey messages and frequencies, but they also make excellent data entry devices in the field and at special events. (and not just position!).

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 …

PCsat augments the terrestrial APRS system (See LIVE map) with a flying worldwide Relay to extend APRS coverage globally. To see those users relaying their data via PCsat only, see Steve Dimse's …

One-way trackers are good for non-manned assets at large movement events.. Not as the only APRS asset for a ham. Trackers should be his 3rd,4th,5th etc tools for APRS support… One-way APRS is …