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 …

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 …

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. .

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 …

ASTARS SATELLITES: 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 …

On the APRS map above, not only do you see all of the usual APRS operators (about a 32 mile wide map between Washington DC on the left, and Annapolis to the right), but in the lower …

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).

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 …