GPS, from a military project to the technology that rules the world

2026-02-16 08:12:00, Tech CNA

The Global Positioning System (GPS), one of the most important technologies of the modern era, has come a long way from a secret military project to an indispensable tool for billions of users around the world.

Originally developed by the United States Department of Defense and now operated by the United States Space Force, the GPS system consists of at least 24 satellites located approximately 20,200 kilometers above the Earth. These satellites orbit in 6 different orbits, ensuring global coverage and a continuous signal.

From OMEGA to Navstar

The roots of GPS date back to the 1960s, when the OMEGA radio system provided navigation based on ground stations, but with limited accuracy. Later, the Transit satellite system used by the US Navy improved global coverage, but still did not provide continuous service.

In 1973, the Navstar GPS program was officially launched, and in 1995 the system reached full operational capacity. Initially reserved for military use, GPS became fully available to the civilian public after 2000, when the accuracy limitation was removed.

How does GPS work?

GPS works through trilateration: the receiver (e.g., your phone) receives signals from at least four satellites and, by calculating the signal's travel time, determines the position with an accuracy of a few meters. Under optimal conditions, accuracy can even reach centimeters with advanced systems.

The system uses highly accurate atomic clocks and even takes into account Albert Einstein's theory of relativity, as without relativistic corrections, positioning errors would reach several kilometers within a day.

GPS in everyday life

Today GPS is integrated into:

-Smartphones

-Vehicles and navigation systems

-Aviation and maritime transport

-Precision agriculture

-Smartwatches and sports equipment

In addition to navigation, GPS plays a key role in emergency services, logistics, banking, and communication networks, ensuring accurate time synchronization.

The future of GPS

With the development of the new generation GPS III and integration with the European Galileo system, further increases in signal accuracy and reliability are expected.

From a strategic Cold War project to a technology that guides our daily movements, GPS remains one of the greatest technological achievements of the last century./ CNA