What is GPS? How does it work

Friends, you must have heard the name of GPS or you may have seen this option in the mobile, app, and Google Maps, if you do not know what GPS is, then today in this post we will tell you what 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. GPS works 24 hours in any season. GPS technology was first used by the United States military in the 1960s and expanded to civilians in the next few decades in the 1980s. Today, GPS receivers are included in many commercial products, such as automobiles, smartphones, exercise watches, and GIS devices.

This technology is most used, it is used in mobiles, airplanes, rail, buses, and trains, it is more used in transport, with the help of this, we can easily find the way to any other place from our location. Distance of the location can be easily detected.

Uses of GPS

In general, GPS has five major uses:

  • Location - Determination of position.
  • Navigation - To get from one place to another.
  • Tracking - Object monitoring or personal movement.
  • Mapping (Mapping) - Making World Maps
  • 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 transmits 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.

For the GPS device to function correctly, it must first establish a connection to the required number of satellites. This process can range 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 GPS device can quickly determine what satellite will be available the next time it scans for GPS signals.

Other GPS System

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

Here are some other interesting facts about GPS satellites:

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


I am an engineer by profession but being a blogger is my old day's dream to create my site for those who are more curious about my birthplace than I am coming from (India). the current city lives in Navi Mumbai, India

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