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Jun 6, 2020
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What is GPS and how does it work?

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Friends, you must have heard the name of Global Positioning System or you may have seen this option in mobile, app, and google map, if you do not know what Global Positioning System is, then today in this post we will tell you what is GPS? And how it works.

What is GPS?

The Global Positioning System (GPS) is a satellite-based navigation system used to detect the location of anything, made up of at least 24 satellites. Global Positioning System works 24 hours in any season. Also, Global Positioning System technology was first use by the United States military in the 1960s and was expand to civilians in the next few decades in the 1980s. Today, Global Positioning System receivers include in many commercial products, such as automobiles, smartphones, exercise watches, and GIS devices.

Because this technology is most useful, it is use in mobiles, airplanes, rail, buses and trains, it is more used in transport, with the help of this, we can easily find the path of the company from our location. The distance of the location can easily detect.

Use of Global Positioning System

In general, GPS has five major uses:

  1. Location – Determination of the position.
  2. Navigation – To get from one place to another.
  3. Tracking – Object monitoring or personal movement.
  4. Mapping (Mapping) – Making World Maps
  5. Timing – measures the exact time.

How does GPS work?

The GPS system consists of 24 satellites deployed in space approximately 12,000 miles (19,300 kilometers) above the Earth’s surface. They orbit the Earth once every 12 hours, at an extremely high speed of about 7,000 mph (11,200 kilometers per hour). The satellites are spread evenly so that the four satellites are accessible through a straight line from anywhere in the world.

Each GPS satellite broadcasts a message that includes the satellite’s current position, orbit, and exact time. A GPS receiver calculates its true position by connecting a broadcast from multiple satellites using a process called Trikonasana. Three satellites are required to determine the location of the receiver, although the connection of four satellites is ideal because it provides greater accuracy.

Global Positioning System

For the Global Positioning System device to function correctly, it must first establish a connection to the required number of satellites. The process can be anywhere from a few seconds to a few minutes, depending on the strength of the receiver. For example, a car’s GPS unit will typically establish a faster GPS connection than a receiver in a watch or smartphone. Most GPS devices also use some type of location caching to speed up GPS detection. By remembering its previous location, a Global Positioning System device can quickly determine what satellite will be available the next time it scans for GPS signals.

Other Global Positioning System System

There are other systems similar to the Global Positioning System in the world, all classified as Global Navigation Satellite Systems (GNSS). GLONASS is a satellite planetarium system by Russia. The European Space Agency is building Galileo, while China is building BeiDou. Most Garmin receivers track both GLONASS and Global Positioning System, and some track BeiDou.

Also Learn,

Here are some other interesting facts about GPS satellites:

  • The official USDOD name for GPS is NAVSTAR.
  • The first global Positioning System satellite was launch in 1978.
  • A full constellation of 24 satellites acquired in 1994.
  • Each satellite is built for about 10 years. Replacements are constantly being built and launched in the classroom.
  • A Global Positioning System satellite weighs about 2,000 pounds and is about 17 feet with solar panels extending.
  • Global Positioning System satellites are power by solar energy, but in the case of the solar eclipse, they have a backup battery onboard.
  • The power of the transmitter is only 50 watts or less.

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