http://www.WhyGPS.com/GPSInfo/GPSDevices/index.php http://www.WhyGPS.com/rss/GPSDevicesTips.xml GPS Devices from Why GPS Selective Availability is a feature included in GPS. This is made intentionally to degrade signals that GPS receives. With the SA on, the accuracy of the GPS is lowered, while if it is off, the accuracy rate is higher. The SA was included in the GPS for the reason that during war, SA is suppos Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/5.php http://www.WhyGPS.com/GPSTips/5.php GPS or Global Positioning System is designed to work 24 hours a day, anywhere in the world. Thus, since it is programmed to operate around the clock, its design is suitable for any types of weather. Thus, any change in weather condition cannot affect the performance of your GPS unit. Be it sto Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/11.php http://www.WhyGPS.com/GPSTips/11.php GPS is an acronym for Global Positioning System. This is a system that uses the aid of satellites which orbit the Earth. Currently, there are 24 satellites that orbit the Earth. These satellites transmit signals to the Earth and are received by GPS receivers. The GPS was originally intended Thu, 04 Jun 2009 23:00:26 -0600 http://www.WhyGPS.com/GPSTips/1.php http://www.WhyGPS.com/GPSTips/1.php Everything here is © Why GPS, Copyright 2009, All Rights Reserved Worldwide.