to provide 3 dimensional location and time
GPS satellites do not 'find' anything, that is not their purpose.
No, GPS is a technology that uses a system of satellites to provide location and time information to a GPS receiver. It is not a type of special purpose software but rather a hardware and software system used for navigation and location tracking.
One can buy a Mio GPS from many online multi purpose websites. For instance, a Mio GPS can be purchased from Amazon or Argos. These Mio GPS systems are of the top quality, as stated in review on these sites.
so I can keep up downlods
Your usb gps should be able to work anywhere you go. The purpose of the usb gps receiver is so that you can unplug it and take it anywhere whenever you need it.
The network of 36 satellites orbiting Earth for the purpose does.
GPS stands of Global Positioning System. A GPS system can provide you with detailed instructions of finding a specific destination. They are often much more reliable and easier to use than a simple map.
The purpose of a portable GPS navigation device is to guide the driver in the correct direction, enabling them to get to their destination quickly and efficiently. It's best to have a portable device so that it can be used in more then one car.
GPS or Global Positioning Systems are used to navigate, give weather updates, and offer location information. The GPS systems are linked to satellites which, in turn, feed the GPS system with pertinent data. GPS systems in vehicles are used to help in navigation. Some digital cameras also inlude GPS, which enable the photographer to see the latitude and longitude of the photograph.
Communication, weather prediction, global monitoring, GPS, espionage, space exploration etc.
http://www.bizrate.com/global-positioning-systems-gps/ is a website which compares GPS units and has very competitive pricing. The only stores which will sell GPS units exclusively are the distributors of a specific brand, which defeats the purpose of comparative shopping.
Communication, weather prediction, global monitoring, GPS, espionage, space exploration etc.