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

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 …

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 …

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 …

To see the type of data that is available to any person in the APRS system and how it is linked to a LIVE web page, simply go to the APRS Satellite WEB page and look at all the callsigns that …

The character after the latitude "N/S" in an APRS position report is a TABLE character and the character following the longitude "E/W" is the APRS symbol character. The TABLE character …

The current design for P-Sat calls for both magnetic torqueing coils and reaction wheels. This combination will allow for a sun-pointing capability along with other attitude maneuvers. The …