APRS (Automatic Position Reporting System) is a transmission mode which allows to exchange position reports of amateur stations,
being fixed or mobile, and formatted data (like weather reports).
Basically, the positions - normally determined by GPS - are exchanged by 'Packet Radio' over the air (VHF, UHF or HF),
and decoded by appropriate software to be presented on a suitable map where all the stations are plotted.
The transmissions are made on dedicated frequencies and relayed (digipeated) by participating stations in the APRS networks,
this enables position reports on world-wide basis. Some satellites are as well
able to act as digipeater (e.g. the International Space Station ISS)
Next to transmissions over radio, the information / positions are forwarded to a number of backbone servers on the Internet, so the
data can be published world-wide.
The FIXED APRS station (ON7EQ) | ||
This station - operating occasionally - is built around following components:
Some usefull links .....
|
||
The MOBILE APRS Station (ON7EQ-9 and ON7EQ-6 via satellite) | ||
The station was once built around following components:
At present running Kenwood TM-D710 !
|
|
|
Some useful links .....
|
||
The APRS Satellite Gateway Station (ON7EQ-10) | ||
This station receives APRS frames from (micro)satellites (or the ISS) and forwards these on RF and to the APRS Worldwide Web Network. For practical reasons, the receiver is located about 30kms away from home QTH.. The station is built around following components:
|
|
|
|
||
The Portable APRS Station (ON7EQ-12) | ||
I wanted to assemble an ultra-compact (75 x 55 x 15mm) portable tracker, which can be connected to 'any' portable radio (Kenwood, Yaesu, Icom, ...). The result is the NANOTRACKER, a 'all-in-one' GPS + APRS encoder, which is self powered, and can be used for portable and/or mobile APRS reporting. More details on the NANOTRACKER page.
|
|
|