http://www.WhyGPS.com/GPSInfo/NavigationSystems/index.php http://www.WhyGPS.com/rss/NavigationSystemsTips.xml Navigation Systems from Why GPS A 12-channel GPS receiver contains 12 channels reserved for satellite communication purposes. On the other hand, a 16-channel GPS receiver also contains 12-channel preset intended for satellite communication. The additional channels provides faster lock-on, enhanced up-to-date information, and Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/13.php http://www.WhyGPS.com/GPSTips/13.php GPS works by receiving from the various satellites signals that indicates where the receiver is. The amount of time and the position of the satellite at the time determine where the person is. The satellites determine the amount of time it took the signal to travel from the satellite to the r Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/2.php http://www.WhyGPS.com/GPSTips/2.php Everything here is © Why GPS, Copyright 2009, All Rights Reserved Worldwide.