For the two hundred eighty-first edition of the GeoGearHeads Limax fills us in about the technology behind the GPS system. Some of the reference material he used in he research was; "Global Positioning Systems, Inertial Navigation, and Integration" by Mohinder S. Grewal, Lawrence R. Weill, and Angus P. Andrews Navipedia "Pinpoint: How GPS Is Changing Technology, Culture, and Our Minds" by Greg Milner "You Are Here: From the Compass to GPS, the History and Future of How We Find Ourselves" by Hiawatha Bray The live video session from this Google+ Hangout On Air can be found on YouTube. Subscribe to the feed: iTunes RSS Stitcher Social Media: Email: [email protected]