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 …

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 …

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

STATE APRS COORDINATORS: There are a number of folks who have stepped forward to volunteer to help coordinate APRS activities in each state or ARRL section, or country. .

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 …

APRS SYMBOL ATTRIBUTES: One of the most important aspects of APRS is the display of tactical information on maps using symbols for each station. Each such SYMBOL has several …

APRStt, (APRS Touch-Tone (tm)) is an APRS protocol for a two-way DTMF-to-APRS gateway to permit the other 95% of ham radio operators with voice-only radios to exchange information …

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 …

Aug 2, 2006 · This page links to all live downlinks from all the APRS satellites being captured by volunteer ground stations around the world as part of the APRS-Internet System (APRS-IS).

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 …