How GPS Works? Working of GPS Global Positioning System  Explained With 3D Animation - video Dailymotion

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00:00The person who invented GPS positioning is definitely a genius. The Earth is so vast,

00:06yet we only need a mobile phone to know each other's specific locations.

00:10In fact, the principle is quite simple. The coverage of the first satellite signal is

00:14represented by a red circle, and that of the second satellite by a yellow circle.

00:19The intersection of these two circles indicates your position. Although there are two intersections,

00:25if you are standing on the surface of the Earth, the points above can be disregarded.

00:30However, in the three-dimensional world, it is more complex because this intersection point is

00:36actually a circle, and the green circle may represent your position, leading to significant

00:41error. At this point, the third satellite comes into play, reducing the circle to two points.

00:48By eliminating the points in the sky using the method just mentioned,

00:51you can finally pinpoint your accurate position. But this is still not precise enough because

00:56satellite signals propagate at the speed of light, and even an error of 0.000001 seconds

01:04can cause the positioning to be off by hundreds of meters. Although satellite-mounted atomic clocks

01:09can eventually correct this error, our mobile phones cannot be equipped with them, resulting

01:14in a discrepancy between mobile phone time and actual time. So, what should we do?

01:21Introduce a fourth satellite for clock synchronization, of course. After the fourth

01:26satellite is utilized, you can determine your location on Earth with just one equation,

01:31but it's not over yet. According to Einstein's theory of relativity, the faster a clock moves,

01:37the slower it will tick. If the clock moves at the speed of light, it will stop. However,

01:42the speed of the satellite is as high as tens of thousands of kilometers per hour,

01:47so the atomic clock on the satellite will be off by 38 microseconds per day. But don't worry,

01:54because the calibration instructions for the atomic clock are integrated into the system

02:00before the satellite's launch. Like, comment, share, and follow for more informative 3D videos.

How GPS Works? Working of GPS Global Positioning System Explained With 3D Animation

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