This document introduces GPS (Global Positioning System) technology. It describes how GPS works using 24 satellites that orbit Earth and transmit time signals. A GPS receiver can determine its position by calculating the time difference of signals from three or more satellites. The document also discusses GPS data collection, types of GPS units, interfaces for connecting GPS units to other devices, and some common uses of GPS such as in agriculture, travel and geocaching.

1. Introduction to GPS Technology Vince DiNoto Co-PI National GeoTech Center [email_address] Funded by National Science Foundation DUE 0801893

2. National Geospatial Technology Center of Excellence Empowering colleges to expand the geospatial workforce. Vince DiNoto Dean of College and Systemic Initiatives [email_address] Funded by National Science Foundation DUE 0801893

5. GeoTech Center Players