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 …

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 into full time 24/7 …

Aug 24, 2010 · As shown in figure 10, and APRS message addressed to the address of "EMAIL" will be picked up by the worldwide APRS system and captured by the Sproul's WU2Z packet engine and …

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 and data with …

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 …

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).

One-way APRS is not normally recommended. APRS is a Network. We want good communications among all participants for maximum utility. Global Mobile and Portable Satcom Kenwood TM-D700A …

APRS was never intended to be a transmit-only vehicle tracking system. It was intended to be a local information resource channel where everything happening in ham radio in the local area was …

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 that tie it all …