GPS introductory slides

Download GPS introductory slides

Post on 20-Jun-2015

65 views

Category:

Documents

1 download

Embed Size (px)

TRANSCRIPT

<ul><li> 1. GPS is everywhere!!</li></ul> <p> 2. The Global Positioning System 24-32 satellites 20,200 km altitude 55 degrees inclination 12 hour orbital period 5 ground control stations Need 4 satellites to beaccurate Each satellite passes over aground monitoring stationevery 12 hourshttp://www.colorado.edu/geography/gcraft/notes/gps/gps_f.html 3. How actual location is determined Receiver position is triangulated using at least 3satellites, 4th needed to adjust the receivers time. 4. Consumer-grade GPS accuracy Horizontal: +/- 10 m (30 ft) error Vertical: +/- 15 m (45 ft) errorYour location is:37o 23.323 N122o 02.162 W 5. 5High-precision GPS accuracy Horizontal: +/- 1 cm error Vertical: +/- 10 cm error </p>