How Does GPS Work?

When you want to know "how does GPS work" to help you navigate, the first thing to know is that the Global Positioning System, known as GPS, uses satellites to pinpoint locations- in fact, 27 satellites orbit the earth. While there are 24 working satellites and 3 extra for back-ups, they orbit the earth twice a day so it is possible to see at least four satellites at any given time, no matter where you are.

Figuring out "how does GPS work?" involves little knowledge because, much like your wireless cell phones, the satellites send signals to your GPS receiver. While GPS positioning was originally designed for the US military, it has become a navigational tool that is used for many purposes, both commercial and personal.

The GPS receiver will locate four satellites in order to figure out where it is located, in proximity. Through this trilateration, it is able to use a three-dimensional mathematical calculation to figure out locations of many things, based on the location of the GPS receiver.

It is an automatic calculation and triangulation that your GPS receiver is able to figure out where you are based on where the satellites are located, but you will need an unobstructed view of the sky for the signals to connect. It is an elaborate combination of the intersecting of the satellite coordinates and adjustments that are made by the GPS receiver for the time delay in receiving the signals from space.

Essentially, your receiver is constantly recalculating its location as you are driving to let you know where you are, even though it takes some time for the signals to reach the receiver through synching with the atomic clocks on the satellites.

While this technology seems quite complex, the GPS receiver gets atomic clock accuracy without the expense because it makes the necessary adjustments for the time delay. It's amazing to think that GPS receivers can be as affordable as they are!

Since the most essential purpose of a GPS receiver is to pick up transmissions sent out by at least four satellites and combine the information to figure out the position of the receiver, it is logical to assume that your latitude, longitude and altitude are converted into a user-friendly format. This information is placed into maps, which are stored in memory and the GPS receiver can be plugged into a computer, to hold more detailed maps or you can get a detailed map through plug-in map cartridges on some models of receivers.

When you want to understand "how does GPS work", you can find out several things, while you are in constant motion, such as how far you've gone, current speed, average speed, a trail showing where you have traveled and estimations of your arrival time, based on the speed you are traveling.This can be helpful in a number of situations, especially for those that travel for a living.

There is no need to worry about the answers to the question-"how does GPS work" because as long as you have a clear view of the sky, the GPS receiver will pick up the satellite system to calculate your coordinates and you can find your way, easily.

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