Use smartphones, but sometimes it's hard to find people who have never used a Google map (or a simple example) GPS. In addition to Google, Hire, Apple Maps, We Go or Microsoft Bing Map services offer mapping services, but Google Maps around us is more. So for example Google Map is said.
Do not know anything in a new area? There are online mapping services to help you. The distance from the surrounding environment to the specific destination, the status of the traffic jam, it says Google Maps
Apple Maps, Google Maps or other mapping services, or send them to the helm or Uber, their success or your advantage - that's why they say no; All of them have a sophisticated technology. And that's the global positioning system, or the GPS in short, if you did not have it, you could get Google Map - but you could not know exactly where you are. Whether or not you send it, the driver might have spent hours trying to find you.
Many people hope that the "global positioning system" does not seem unfamiliar to anyone after saying "GPS". On some phones it is also called "location". And for the benefit of the new curriculum, nowadays students of secondary schools have the idea of what GPS is like.
But fewer people know how GPS works. But we can guarantee that many people have curiosity. Have you ever wondered how GPS works? The objective of this post is to satisfy your curiosity.
What is gps :
Whether or not to judge the naming conundrum, the Global Positioning System or GPS is really a nice system. More explicitly, it is a system created with at least 24 satellite satellites or satellites placed in orbit around the Earth. Of course, there are 3 more satellites in the backup - when you can not say what is the distance to the space! Of course, according to some estimates, there are 32 satellites in the GPS.
These artificial satellites of GPS are not staying together. Rather, they are arranged in roughly equal distances (around 12,000 miles altitude) around the Earth in such a way that all satellites cover all parts of the world (even the dark parts of the Amazon forest) by sending signals. You have got at least 4 satellites you get "with", keeping in mind that this whole network is sorted.
Who is the owner of GPS? Who has sent GPS satellites?
Bangladesh has become the owner of its own (Bangabandhu-1) Communication Satellite last year. There are many countries that have no satellite yet. So who sent the satellite space for the GPS? Who is the owner of them? Google, Microsoft or NASA?
Very good question Actually the owner of these GPS satellites is the United States government. Their defense departments were sent to space for military use in the 1970s. Later, in the 1980s, they made these satellites or the whole GPS system open to all countries or common people. To maintain GPS satellites, there are a total of 30 control rooms in the world, whose headquarters is located at Colorado Springs.
Although it was so much of the previous technology, ordinary people used GPS very rarely. Only aircraft, ships, fishing vessels or adventurers used this technology with GPS devices. But after coming to the smartphone, the small GPS chip is inserted inside the phone. And now with the use of GPS in conjunction with concepts like Google Map or Uber, it is widely used.
How does GPS work?
The GPS chip on your phone is the GPS signal receiver. It can catch incoming signal from GPS satellites. This receiver chip does not transmit any information or transmits to the satellite.
The 24 satellite satellites that were initially started, these satellites are actually transmitting one type of radio signal 24 hours a day and seven days a week. The power to hold that signal is in the GPS chip that is available in your smartphone or car tracker. Nowadays, however, GPS chips are smartwatch and even the key rings.
GPS satellites are fitted with an atomic clock which gives a very good time of day to day. And there is a clock on your phone. The signal that the satellites send is mainly during the time of sending the signal. The time that your phone receives the signal and when your phone receives that signal, the satellite calculates the actual distance between your phone. From this distance, GPS determines your position.
But there is a problem here. The problem is that you can not position the second thing with the distance of another thing with one thing. You need to take a distance of at least three things in order to determine location.
If an example gives clearance. Suppose, your friend told you on the phone that he is just 1 kilometer away from the gate of the Jatiya Sangsad Bhaban (or something more). If you only listen to this you will not know in any way where he is actually. Because he can stay 1 kilometer away from any parliament building. That means, if a circle of radius of 1 kilometer is envisaged around the Parliament building, then it can be in any place along the circumference of the circle.
Now what if he says that he is staying at one and a half kilometers away from the Prime Minister's Office? Then you will become clearer to his position. If you imagine the circle of 1.5 km radius centered around the head office of the Prime Minister, then you see that this circle intersects the circle in two points. That means your friend is in one of these two points. But you did not find your friend's location.
Now if your friend tells you that he is 500 meters away from the Tejgaon railway station right? Then your work was done. Now imagine the circle of 500 meters radius centered on the Tejgaon railway station and you will see that three circles intersect at just one common point. The intersection is the Farmgate Bus Stop. And your friend is actually in Farmgate Bus Stop. Not funny? This calculation is called trilateration.
GPS also works on this principle. The GPS chip on your phone simultaneously determines its distance from 3-4 GPS satellites. Generally, with the signal of three GPS satellites, your phone is exiting your location as the example above. In this way, the more satellites you get, the more efficient your location will get. This system works best under the open sky, because it is advantageous to get satellite signals.
Combination of GPS and digital maps :
But your GPS does not know the name of your location in this way. He brings out your coordinate point. It knows your two-dimensional position through two points called latitude and longitude (latitude, longitude). You can publish every point of the whole world to a coordinate point. Two place names can be one but Coordinate will not be one. This GPS Coordinated Points lets you understand where you are staying at a place on your phone's digital map like Google Map, Bing Map or Apple Map. Mapping apps such as Google Maps
Does the GPS go without the internet? :
In reality, there is no obligation to have internet connection on your phone to receive GPS signal. You only need internet to download a graphical map. So if you download any part of Google Map for offline use, then you can see your own location on the GPS without internet.
If America closes the GPS? :
GPS is just a system for determining a location. Apart from GPS there are other alternative methods to know the location. But they are not as common as they are, but they are not so strong as GPS.
As already mentioned, the owner of GPS is the US government. Although they have made it open for the whole world, but they can stop it (maybe in situations of warfare).
So Russia has developed a system like GPS that has been named GLONASS. Nowadays, you can see the smartphone's specification Location: A-GPS with GLONASS. This means that the phone can detect the location of both US GPS and Russian glinas.
China is also working on its own positioning system named BDS and Europe Galileo.
Again, mobile phone service providers can also know your location based on how far away your phone is from a tower. In the same way, the location can be determined using the WiFi network.
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