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GNU AIS is software for demodulating and decoding Automatic Identification System messages used by ships to navigate. You will need a VHF receiver with discriminator output to get it to work.
trakkcor tracks your position via gps and submits the position data to your server. All you need is a j2me-compliant mobilephone which supports JSR-82 and an external gps receiver.
An easy and light carrier phase differential gps code that takes integrated carrier phase measurements from a ground station and a receiver and returns 2-5cm accuracy on relative positioning.
The GPS Simulator simulates a GPS receiver which emits NMEA sentences over Bluetooth. It can be used to test location based applications on real mobile devices, in particular on mobile devices which have a JSR 179 implementation based on a connected GPS.
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MATCH is an application for J2ME / JavaME enabled devices which allows tracking (recording of tracks) and route-navigation with your mobile phone and a NMEA-compliant Bluetooth GPS-Receiver when jogging or biking.
Trip Tracker is a position tracking client-server system. A real time tracking environment can be set up with a GPS receiver and a tracking server. The map client can show the map position of the GPS client in real time.