Senior Design Project: GPS System

It may not look like it’s doing much, but believe me, it is! Our project is designed to take in a GPS satellite signal, process it, store it, and output a record of where it has been. Intially it was going to broadcast it's position through a radio transmitter (APRS), but that functionality was scrapped during the design process. This video shows much of the unit's functionality, with the exception of showing the datalog itself. The video starts by showing you the four options in the main menu, and then goes through them one by one: 1) Current GPS Data 2) SatLock (Satellite Lock) Status 3) AX.25 Packets 4) Output Datalog The "Current GPS Data" menu displays current latitude, longitude, altitude, and UTC time (subtract 5 hours for CST). Because we were only able to get a 2D fix for the video, and altitude requires a 3D fix, altitude is not displayed. To check this out, go to a site like MapQuest and type in the coordinates you see in the video - see what comes up :) (NOTE: since the longitude is "W", be sure to type it in as a negative number!) The "SatLock Status" menu displays the status of the unit's satellite fix (none, 2D, or 3D), the number of satellites tracked, the horizontal dilution of position (HDOP), and height of geoid above WGS84 ellipsoid (which is another characteristic of position and fix). The "AX.25 Packets" menu shows you that we are converting, in real-time, the GPS data (NMEA 0813 standard) into the standard specified by ham radio (AX.25 with APRS ...

Channel: YouTube Video Length: 1m 51s Date Found: Tue, May 24 2011 11:10 AM Category: Technology Date Produced: Mon, May 23 2011 10:06 PM View Count: 0