Aircraft Tracking - GPS
 

I'm associated with an aviation college. We would like to track our aircraft in the training areas located within 25 miles of our base. The ideal solution would be low power radio transmitter in the aircraft sending positional information to a base receiver. I've investigated a number of systems available for surface fleets but haven't been able to find anything applicable to small aircraft.

GPS tracking is available - the Grob 115 has some form of tracking with aircraft position shown on a screen at the home base. Here are a couple of links:

Guardian Skytrax Automated Flight Following System

Aircraft Tracking from Mighty GPS

I haven't read the APRS site, but it might give you some hints.
http://aprs.org/
Talking,writing Bob Bruninga [WB4APR], father of APRS, might be worth the effort. His email address is in red near the top-left of the above page.

If your aircraft are Transponder equipped already, to ADS-B standard (mode-S); then you could locate and track them using an ADS-B receiver.

Like these:- Kinetic Avionic Products - Home Page

or

This one:- AirNav RadarBox - The world's best selling and most advanced Real Time Virtual Radar

cheers

OOT.

Tracplus Global from Dunedin New Zealand have a good system.

They have a really good portable to place on the panel of an aircraft. Can be swapped between aircraft. Highly accurate system and super easy to use.

I know there are a lot of commercial operators and private pilots using this system. I think they now have an iphone application just out.

Their link is TracPlus - Unable to detect Javascript