Module 9: GPS: The Global Positioning System

LEARNING OBJECTIVES

1. Identify the 3 segments of GPS
2. List the acceptable number of satellites (SV's - space vehicles) for an accurate 3D position
3. List and explain sources of error in the GPS system
4. Explain why satellites are provide a good system for located positions on the earth
5. Define trilateration
6. Discuss how the distance from the satellite to the GPS receiver is determined.
7. Describe the almanac and what it is used for
8. Define ephemeris information and what it is used for
9. Define autonomous GPS
10. Describe differential GPS (SBAS, Post-processing)
11. Describe the critical software settings in Trimble TerraSync

GENERAL GPS TERMS TO KNOW

• GPS - Global Positioning System
• NAVSTAR - Navigation Satellite Timing and Ranging
• Almanc
• Ephemeris
• Accuracy
• DGPS - Differential GPS
• SBAS - Satellite Based Augmentation System
• WAAS - Wide Area Augmentation System
• Selective availability
• Mulitpath
• Obstructions
• Atmospheric Delay

RECREATION GRADE GPS TERMS TO KNOW

• tracks
• waypoints
• gpx
• kml
• Garmin MapSource
• GPSUtility
• GPS Babel
• GPS Visualizer - website based on GPS Babel
• DNR Garmin
  

DISCUSSION

GPS PowerPoint Supplement

- refresh the page if the file does not download

ACTIVE LEARNING EXERCISE

Utilize Garmin recreation grade GPS to collect waypoints and tracks around campus. Incorporate this data into Google Earth (KML) and ArcGIS (shapefile).

more ...

• Get photos and topos on to your Garmin
• GPS Utility
• GPS Babel