Government Site: http://www.gps.gov/systems/gps/
USNO NAVSTAR GPS: http://tycho.usno.navy.mil/gpsinfo.html
Wikipedia page: http://en.wikipedia.org/wiki/Global_Positioning_System
Alternatives to GPS
LORAN: http://en.wikipedia.org/wiki/LORAN#LORAN_method
GPS: http://www.themobileindian.com/news/949_Emerging-alternatives-to-GPS
GLONASS: http://www.spaceandtech.com/spacedata/constellations/glonass_consum.shtmlIRNSS-http://www.irnssindia.com/
Compass: http://en.wikipedia.org/wiki/Compass_navigation_system
Earth Diagram
Earth Picture (only): http://rst.gsfc.nasa.gov/Sect16/full-20earth2.jpg
Introduction Picture: http://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/GPS_Satellite_NASA_art-iif.jpg/220px-GPS_Satellite_NASA_art-iif.jpg
Transmission of GPS signals: http://images.yourdictionary.com/images/computer/GPSAUG.GIF
Reception of GPS signals: http://www.techshop.co.za/images/FAQ_gps_comp.gif
Modulation and Encoding & Uses CDMA(C/A) and BPSKhttp://en.wikipedia.org/wiki/GPS_signals, http://www.kowoma.de/en/gps/signals.htm, http://alumni.cs.ucr.edu/~saha/stuff/cdma_gps.htm, http://www.wamis.org/agm/pubs/agm8/Paper-7.pdf
Satellite Signal Acquisition, Tracking, andData Demodulation: http://www.artechhouse.com/getblob.aspx?strname=kaplan_894_ch05.pdf
USNO NAVSTAR GPS: http://tycho.usno.navy.mil/gpsinfo.html
Wikipedia page: http://en.wikipedia.org/wiki/Global_Positioning_System
Alternatives to GPS
LORAN: http://en.wikipedia.org/wiki/LORAN#LORAN_method
GPS: http://www.themobileindian.com/news/949_Emerging-alternatives-to-GPS
GLONASS: http://www.spaceandtech.com/spacedata/constellations/glonass_consum.shtmlIRNSS-http://www.irnssindia.com/
Compass: http://en.wikipedia.org/wiki/Compass_navigation_system
Earth Diagram
Earth Picture (only): http://rst.gsfc.nasa.gov/Sect16/full-20earth2.jpg
Introduction Picture: http://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/GPS_Satellite_NASA_art-iif.jpg/220px-GPS_Satellite_NASA_art-iif.jpg
Transmission of GPS signals: http://images.yourdictionary.com/images/computer/GPSAUG.GIF
Reception of GPS signals: http://www.techshop.co.za/images/FAQ_gps_comp.gif
Modulation and Encoding & Uses CDMA(C/A) and BPSKhttp://en.wikipedia.org/wiki/GPS_signals, http://www.kowoma.de/en/gps/signals.htm, http://alumni.cs.ucr.edu/~saha/stuff/cdma_gps.htm, http://www.wamis.org/agm/pubs/agm8/Paper-7.pdf
Satellite Signal Acquisition, Tracking, andData Demodulation: http://www.artechhouse.com/getblob.aspx?strname=kaplan_894_ch05.pdf