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Best Live GPS Tracker
What Is GPS Live Tracking?
When you’re in your vehicle and following the map on your Garmin or TomTom (or other GPS-equipped software), do you know how that software works? Or what legislation governs its use? Or how to determine the best unit for you?
Those are all very real questions—and questions we hope to help you answer. When it comes to GPS tracking and your car GPS tracker, there’s a lot of information out there, so much so that it can be disorienting and confusing. GPS Tracking Review is here to help answer those questions in a clean and clear way so you can find the best live GPS tracker for car, truck or personal asset protection!
What is GPS?
GPS stands for Global Positioning System, which is a universal satellite-based system based on latitude and longitude. Using GPS data allows for a moving object (such as a person or vehicle) to track its movements, including setting those movements against a map backdrop, either in real time (think of map software such as a car GPS tracker, for instance) or later (such as when analyzing a route taken after the fact). Nearly any map you might use digitally in your vehicle will utilize a live GPS tracker, or real time GPS tracker, to help display where you are relative to where you need to go; that’s true both of devices installed in your car (such as a Garmin or TomTom) or mapping software on your phone.
Who Discovered GPS?
That depends on who you ask. Officially the United States Department of Defense launched the GPS system for military use in 1973, with civilian use phased in in the 1980s. The full system became fully operational and freely accessible to anyone with a GPS receiver in 1995.
Beyond that, who deserves credit is a matter of some controversy. For years, Ivan Getting and Bradford Parkinson were considered the inventors, but in 2010 Roger Easton was given his due for a breakthrough that made the entire project possible: Fitting the satellite-based system around the atomic clock, which allowed for more precise locations.
Since then, however, another influential figure has come forward: Dr. Gladys West, who was only finally recognized for her contributions by the US Air Force—and was in fact inducted into the Air Force Space and Missile Pioneers Hall of Fame for her work—in 2018.
How Does the GPS Work?
Alright, are you ready for some fun physics? Here goes!
The GPS network has roughly 30 satellites in orbit at all times, at an altitude of 20,000 kilometers. Because there are so many satellites, and they’re at such a height, anywhere you go on Earth (with very rare exceptions, which we’ll get to…) you should have at least four GPS satellites visible. That doesn’t necessarily mean you’ll be able to see the satellite, of course, but that if you could see that far, you would.
And the fact that you’re always in range of four GPS tracking satellites means that those satellites can send information to your GPS device—whether a car GPS tracker or handheld GPS tracking device—about how far away they are. More precisely, each satellite sends information about its position at regular intervals. Your device intercepts those information packets and calculates the time it took to receive that information, which travels at the speed of light. The GPS receiver in your device then can calculate how far away each satellite is based on the time it took for the message to travel from the satellite. And as long as your device gets that information from at least three of the four satellites, it can pinpoint your location using a process called trilateration.
So what’s trilateration? Think of a Venn diagram with three circles. Your device, which knows the distance to each satellite, can create a circle to represent the area that is that distance from satellite A. It can likewise create circles that represent the areas of the right distance from satellite B and satellite C, respectively. The point where all three of those circles intersect? That point is your location.
That’s an oversimplification in some senses—after all, the surface of the earth isn’t a flat plane, so instead of circles for each satellite, your GPS receiver maps spheres—but that’s the general idea of how your GPS tracking device works to determine your location.
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