This is a project for the Missouri Space Program at the University of Missouri Columbia. It is a high altitude ballon tracker based on Arduino and the APRS packet reporting system.
It is based off this tutorial with modification to work with our setup. It uses the Trackuino library for APRS packet transmission. Specifically the code to interact with the sensors is not used (we only have a GPS) and the GPS code was modified to work with the Adafruit Ultimate Breakout v3 GPS using the Adafruit_GPS library
More information about APRS packet format can be found here