Describing geocaching.

1. GPS Workshop
Sheila Adams
sadams@sau50.org
www.ryejrhigh.org/workshops/gps

2. Global Positioning System (GPS)
• 24 (+ 3) satellites
around the world.
• High orbit.
• Trilateration (3D)
– 3+ satellite locations
– Distance to satellites
(timing)
• Radio signals (high
frequency, low power)
http://octopus.gma.org/space1/where.html

3. Trilateration Activity
Circles and Spheres