Massachusetts Institute of Technology
Mit: Open Course Ware: Gps: Where Are You?
A basic course from MIT on how a Global Positioning System(GPS)works, and the many new applications for using it. Includes lecture notes and assignments.
Other
Galactics: Types and Uses of Satellites
Describes nine types of satellites and how they are used.
Other
Eduscapes: Geocaching With Kids
This introduction to geocaching provides the basic information a teacher or parent would need to begin geocaching with children. Ideas about the equipment needed, examples of different types of geocaching, and advice on ways to work with...
Google
Google Earth Blog
The author has extensive experience using GPS and has worked with NASA. In his blog he posts information about the latest uses and applications of Google Earth.
Other
Geocacher University: Your First Geocaching Hunt
Here's a step-by-step guide to getting involved with the activity of geocaching. From setting up an account at a popular geocaching site to choosing a geocache to hunt for, to finally finding the cache and what to do then, this site will...