GPS systems have become increasingly popular, portable and affordable. Sales for this small navigation system are off the charts, and they are the hottest ticket at every electronics store and big box retailer around.
So what is GPS exactly, how does it work, and why is it so popular? What other uses are there for technology? For the answers to this and more, keep reading.
What is GPS?
GPS is an abbreviation for Global Positioning System. This technology was developed by the US Department of Defense, and employs a network of 24 strategically placed satellites around the globe. It was originally intended for military use only, but the government made it available for anyone to use in the 1980s. That coupled with latest advances in portable technology has made GPS the new hot item. It is extremely popular with those who drive for a living, such as couriers.
How Does it Work?
A GPS receiver uses signals transmitted by these GPS satellites to triangulate exact locations. The 24 satellites circle the planet twice a day and transmit signals to the earth, which are what the receivers use. The receivers basically use the difference between the time a signal was transmitted and received to calculate how far away the satellite is.
In order to track movement as well as calculate an object’s latitude and longitude, a GPS receiver has to get signals from at least three satellites. If you add one more satellite to the mix, you can track altitude as well. One the receiver has the location, other variables can be accounted for such as speed, …