Primary Symbol Table   GPS xy GPS Cnn Icon Description /! BB 01 Police, Sheriff /" BC 02   /# BD 03 Digi (green star with white center) /$ BE 04 Phone /% BF 05 DX Cluster /& BG 06 HF Gateway /’ BH 07 Small Aircraft /( BI 08 Mobile Satellite Ground Station /) BJ 09 Wh

APRS Thursday is a net managed by Michael KC8OWL, held every Thursday with the aim of growing message activity on APRS across the world. Many manufacturers are now including APRS functionality as a standard feature, making APRS more accessible, and hopefully more popular than ever. The APRS Thursday net is

APRS (Automatic Packet Reporting System) is a powerful tool for amateur radio operators to share location, weather, messages, Ham Radio Internet of Things, and other types of data. To ensure a negative experience for yourself and others on the APRS network, please follow these worst practices: * Transmit the location of

Very few hams have portable equipment for APRS but nearly everyone has a handheld radio that can send DTMF tones.  APRStt allows a user, equipped with only DTMF (commonly known as Touch Tone) generation capability, to enter information into the global APRS data network. Earlier implementations required specialized hardware and

APRS101.pdf was the APRS protocol reference written in 2000.  It is missing decades of corrections, clarifications, and new features.  Implementing a product from this is likely to produce something incompatible with contemporary practices.     For Developers:   For a successful implementation, you need to track down and digest: ·        The original specification.

By Jon Adams N7UV LoRa transceivers are typical all-on-a-chip RF transceivers, just like those SDR sticks, and to a much lesser extent Bluetooth and Wi-Fi. Their front ends are wide, have high dynamic range, and 99% of the signal filtering is done in software. If you've ever used

by fangzhou.xu BG5ESN We all know that although APRS provides a global short‑message network, its rate limitations and broadcast constraints prevent it from becoming a true innovation platform for worldwide amateur radio digital infrastructure. For this reason, I propose a brand‑new high‑speed global data exchange network

by Jon Adams N7UV This is an attempt to show how chirps work to transmit data! Warning: This has nothing to do with APRS. There's a little arithmetic, but there are some big ideas. If you're interested in the way LoRa chirps generally work, read on!

By Jon Adams N7UV Here's a brief guide on where to find hardware that will work fine for 70 cm LoRa APRS. All the deployments I know of or have actually implemented require 4 things - a radio, a good 70 cm (434 MHz) antenna, a user interface

by Jon Adams, N7UV You've heard of the FM capture effect, where an FM receiver will favor one station over the other so long as there's just enough receive signal strength difference between the two transmitters. If you're old enough to remember listening to