Tuesday, November 16, 2010

Geocaching

Geocaching is a kind of modern-day treasure hunt game. Geocachers are given the coordinates of a specific cache and use GPS devices to locate said cache. You can find plenty of geocaches on this website: http://www.geocaching.com/ .

This interesting use of GPS technology raises the question "How does GPS work?" GPS, or the Global Positioning System, works with a system of 24 satellites. When a user wants to know their location, he/she uses a GPS device to find their distance from three or more satellites (technically, four are needed for an exact location), and then can triangulate their location based on the locations of the satellites.

In class, we had a "Geocaching Battle Royale," where we had to find the most geocaches during the period. Our group only found two of the four we searched for.