GPS was originally developed by the US military for defence purposes and is based on a system of 24 satellites which orbit the earth. A GPS receiver can triangulate its position using Time Of Arrival (TOA) methods as long as at least three satellites are visible. Typically accuracy is around 2 to 10m although higher resolutions can be achieved. The cost of GPS hardware continues to fall and GPS positioning remains a free service to consumers. Integrating GPS hardware technology into cellular phones is one of the main positioning solutions being explored by handset manufacturers.
Pages in category "GPS"
The following 27 pages are in this category, out of 27 total.