MIT continues to amaze and delight educators and the general public with fantastic OpenCourseWare (OCW) offerings. This course, taught by Professor Thomas Herring in spring semester of 2012, allows interested individuals the opportunity to learn about the principles of the global positioning system. The materials here include the syllabus, lecture notes, and assignments. The lecture notes constitute the heart of the offerings and are divided into 23 sections. These include "Coordinate and Time Systems," "GPS satellite orbits," and "Basic antenna operation." Visitors can elect to download all of the course materials at once, or they can select certain items of interest individually. Finally, visitors are encouraged to send feedback on the course and sign up for the OCW newsletter.