Automatic Position Reporting System

What is APRS all about?(Humans communicating INFO with Humans)

Immediate local digital and graphical information exchange between all participants in a local area or event. This includes:Positions of all stations and objectsStatus of all stationsMessages, Bulletins and AnnouncementsWeather data and telemetryDF bearings and signal strengths for quick transmitter huntingRF Connectivity plots of all stationsLocal OBJECTS on a common map display for all usersLocal Freqs, IRLP, ECHOlink, Winlink, Nets, MeetingsTypical applications are:Routine local awareness of all ham radio events and assets around youMarathons, races, events and public serviceSearch and rescueFamily communications and tracking and one-line emailsMobile-to-mobile global text messagingWeather data exchange and displayEfficient multi-user Satellite communications

History

● APRS was developed by Bob Bruninga, WB4APR, as a real-time local tactical communications system for rapidly exchanging digital data of immediate value to operations. This really took off when GPS became available and MAPS were integrated into the system for tactical situational awareness of everything in the net. In the 18 years since its introduction, (see history) it has grown to encompass just about every aspect of Amateur Radio.

GPS

height of about 11,500 miles

travelling at 9,000mph

signal frequency (1575.42 MHz)

The distance to the GPS satellites can be determined by estimating the amount of time it takes for their signals to reach the receiver. When the receiver estimates the distance toat least four GPS satellites, it can calculate its position in three dimensions.

Packet

● 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

● .

SSID (call sign +what you are)

0 Home Station, Home Station running IGate.-1 Digipeater, Home Station running a Fill-In Digi, Wx Digipeater-2 Digipeater [#2 or] on 70CM-3 Digipeater [#3]-4 HF to VHF Gateway-5 IGate (Not home station)

-6 SatGates & Special function Station.-7 Kenwood D7 HH

-8 Secondary Mobile station.-9 Primary Mobile station.-12 Portable Units such as Laptops etc.

-14 Trucks

-15 Mobile HF station.

Required Kit

Sound Modem

● TNC can be hardware or software

How it goes together

Software

● Ui View APRSI32

How it Works RF only

How it WorksRF only

I Gates

www.aprs.fi

www.aprs.fi

Aprs32

VHF Aprs

APRS network

On HF

Hf Aprs

HF Aprs

Messages

Who else uses it● CAA ACARS● Emergency services TETRA● Shipping SPRS● Vehicles and boats DATATRAK

Amateur Uses

● Olympic flame● Raynet● Foxhunt● Propagation studies● Rallies● Events● Balloons

Links

http://www.argentdata.com/catalog/

www.byonics.com/tinytrak/

http://www.crosscountrywireless.net/aprs_tnc.htm