What is GPS? Explained!


A Global Navigation Satellite System, or GNSS is a name given to multiple satellite-based positioning, navigation, and timing(PNT) systems throughout the world. The Global Positioning System(GPS) is one such system.

What GPS stand for?

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The Global Positioning System (GPS) is a constellation of 31 satellites developed and operated by the United States for use in satellite navigation.

Interesting: How many satellites are there in space? 2022

How does GPS works?

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GPS system has 3 parts;

  • Ground stations,
  • Receivers ( on your phone, car and etc.)
  • Satellites

When you try to find your location via the GPS, your GPS receiver starts measuring the time it takes for a signal to arrive between you and the satellites.

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And the system needs 4 satellites at least.

The ground station provides you a correction data to determine a precise location in the world.

Who Invented GPS?

Naval Research Laboratory’s space applications branch developed several engineering applications and technologies that led to GPS.

The team behind the GPS

April 30, 1921 – May 8, 2014 was an American physicist and state representative.

(January 18, 1912 – October 11, 2003) was an American physicist and electrical engineer,

February 16, 1935) is an American engineer and inventor, retired United States Air Force Colonel and Emeritus Professor at Stanford University.

When GPS invented?

The GPS project was started by the U.S. Department of Defense in 1973.

What are the types of GPS?

  • Assisted GPS (A-GPS)
  • Simultaneous GPS (S-GPS)
  • Differential GPS (D-GPS)
  • Non-differential GPS
  • Mapping and non-mapping GPS

As we mentioned before that, it’s all about measuring the time correctly between you and the satellites. All GPS receivers, in your phone or on your cat or dog just does it.

What signal does GPS use?

Signals. Each GPS satellite transmits data on two frequencies, L1 (1575.42 Mhz) and L2 (1227.60 MHz). The atomic clocks aboard the satellite produces the fundamental L-band frequency, 10.23 Mhz.


What are the advantages of GPS?

  • Safety driving
  • Reducing Fuel Costs
  • Increasing productivity in the surveying industry.
  • Theft Recovery.
  • Car Tracking


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News Desk
News Desk
SurveyingGroup has been covering the Geospatial industry daily with in-depth tips, trends, and insights – plus breaking news and analysis from the SurveyingGroup team and experts industry practitioners since 2017.

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