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Guide to Satellite Navigation
What is Satellite Navigation?
Wikipedia’s definition of ‘satellite navigation (SatNav)’ is:
Wikipedia’s definition of ‘satellite navigation (SatNav)’ is:
‘The method by which electronic receivers determine their location (longitude, latitude, and altitude) to within a few metres using time signals transmitted along a line-of-sight by radio from satellites.’
As of 2009, the United States NAVSTAR Global Positioning System (GPS) is the only fully operational Global Navigation Satellite System (GNSS). The European Union's Galileo positioning system is a GNSS in initial deployment phase, scheduled to be operational in 2013.
The technology has been around since the 1960’s and was originally designed for military applications.
Most commonly these days a Sat Nav device can be found in cars, boats, planes and anything else that moves, including people as mobile phones have featured a GPS for a number of years now.
How does it work?
There are two aspects of how satellite navigation is achieved:
1. The receiver: The Sat Nav device itself.
2. The transmitter: The GPS components.