What is the APRS
The APRS system was invented and introduced by Bob Bruninga, an amateur radio operator
WB4APR USA
Robert.E.Bruninga
115Old.FarmCt
Glen.Burnie.MD21060
USA.
Officially, APRS is the abbreviation for Automatic Position Reporting System.
Some feel APRS should be the abbreviation for Automatic Packet Reporting System. Originally the system only reported positional information. However, in recent years, APRS has become more than a standard for reporting the simple location of an object. It is now used for
APRS Features
• Station Status
• Station Positions
• Messages
• Bulletins
• Stations Heard
• Station Tracking
• APRS Satellites
• DX Clusters
• Internet and Igates
• Frequency Coordination
• Protocol
• Reporting weather
• Digital Advance Fox Hunting E.g. Click
• Internet Access
Locations of objects that have no actual APRS systems aboard, like starting locations for races, check points for those races, etc.
Basically, an APRS system requires a location sensor (GPS, but sometimes just a person with a map), a Packet radio transmission system on one end and a packet radio receiver and a computer on the other end of the system.
The first system collects its current location and encodes it in a standardized format as a string of text and transmits that information as a beacon. The transmission is NOT directed at any one station but rather beaconed out for all listening stations to hear and interpret.
A second system receives the information using APRS software and then decodes the packet and, typically, places an icon on a map showing the transmitting station's location.
This page is only meant to provide this snapshot overview of APRS. Visit the links below to get more detailed information on this technology.
APRS is a real-time tactical digital communications protocol for exchanging information between a large number of stations covering a large (local) area. As a multi-user data network, it is quite different from conventional packet radio.
APRS Tracking Example
What's a Tracker?
A tracker is the means by which a mobile station can be tracked. It may consist of a radio, antenna, TNC and GPS but since most of the time the mobile just transmits unconnected UI frames, the receiver part of the TNC is redundant. Therefore more and more stations are using small-dedicated tracker units instead of full-featured TNCs. These trackers can have various operating abilities. The simplest will just transmit a UI packet indicating their position every few minutes, others have more functions
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