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What is GPS and how does it work?

What is GPS, How to use GPS
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Have you ever thought that you don't know the way but you can win the destination without any people? Is that even possible? Yes, it is possible in today's age of technology. And it is possible through GPS. There are online mapping services to help you. From the surrounding environmental conditions to the distance to a specific destination, the state of traffic jams, Google Maps says.

In addition to Google, services like Hear, Apple Maps, We Go, or Microsoft Bing Maps provide mapping services, but there are more Google Maps users around us. So Google Maps is mentioned as an example.

Apple Maps, Google Maps, or other mapping services or the latest send or Uber, their success or your advantage - whatever it says; There is a magical technology in everything. And that's the Global Positioning System, or GPS for short, without which you might get Google Maps - but you wouldn't know exactly where you are. Or send / Uber but the driver might take a few hours to find you.

While the word "global positioning system" may seem unfamiliar to many, I hope it doesn't sound unfamiliar to anyone else after saying "GPS". Some phones also call it "location". And for the benefit of the new curriculum, nowadays even the secondary students should have an idea about what GPS is.

But few people know how GPS works. However, I can guarantee that there are many curiosities. Have you ever wondered how GPS works? The purpose of this tune is to satisfy your curiosity.

What is GPS? What is GPS

Judging by the success of the nomenclature or not, the Global Positioning System or GPS is excellent. To put it more clearly, it is a system made up of at least 24 artificial satellites orbiting the earth. Of course, there are 3 more satellites as a backup - it is not possible to say what happens in distant space! However, according to some estimates, there are a total of 32 satellites in GPS.

But these artificial satellites of GPS are not located together. Rather, they are arranged around the earth at approximately equal distances (at an altitude of about 12,000 miles) in such a way that all the satellites together send signals to cover every part of the world (even any deep part of the Amazon forest). The whole network is designed with at least 4 satellites in mind.

How does GPS work? How to use GPS

The GPS chip on your phone is the GPS signal receiver. It can detect signals coming from GPS satellites. This receiver chip does not transmit any data or transmit it to the satellite.

Of the 24 satellites I mentioned in the beginning, those satellites transmit one type of radio signal 24 hours a day, seven days a week. The GPS chip can capture the signal that is in your smartphone or car tracker. Nowadays, however, GPS chip smartwatches are even in the keyring.

GPS satellites are equipped with atomic clocks which give a very fine time to day after day. And you have a watch on your phone. The signal that the satellites send is the time it takes to send the signal. Calculates the actual distance between the satellite and your phone from the time your phone generates the received signal and the distance between the time your phone receives that signal. From this distance, GPS determines your location.

But there is a problem here. The problem is, you can't determine the position of a second thing by the distance between one thing and another. To determine the location where you need to take the distance subject to at least three things.

Giving an example will clear the matter. Suppose your friend informs you on the phone that he is 1 km away (or more) directly from the gate of the Jatiya Sangsad Bhaban. If you only hear so much, you will never know where he is. Because he can be 1 km away from the parliament building in any direction. This means that if a circle with a radius of 1 km is imagined around the parliament building, it can be anywhere along the circumference of the circle.

Now, what if he says that he is at the same time one and a half kilometers away from the Prime Minister's Office? Then his position will be a little clearer to you. Now if you imagine a circle with a radius of 1.5 km around the center of the Prime Minister's Office, you will see that this circle intersects the previous circle at two points. That means your friend is in either of these two points. But you did not find your friend's location.

Now, what if your friend tells you that he is 500 meters away from Tejgaon railway station? Then your job is done. If you imagine a circle with a radius of 500 meters around the center of Tejgaon railway station, you will see that all three circles intersect at a single common point. And that intersection is the Farmgate bus stop. And your friend is actually at the Farmgate bus stop. Isn't that funny? This calculation is called trilateration.

GPS also works on this principle. Your phone's GPS chip simultaneously determines its distance from 3-4 GPS satellites. Your phone usually finds out your location with the signal of three GPS satellites as in the example above. In this way, the more satellite signals you get, the more accurate your location will be. This system works best under the open sky because it is convenient to receive satellite signals.

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