What is Global Positioning System (GPS) | How Does a GPS Car Navigation System Work?

 Global Positioning System (GPS) Facts

The Global Positioning System (GPS) was established by the U.S. Department of Defense. The only system of its kind in the world, GPS uses microwave signal transmission from a network of 24 satellites orbiting 12,000 miles above Earth to determine the location of the receiver, as well as its speed and direction. Originally ordered by the military, President Reagan authorized the use of GPS in 1983 after 269 passengers and crew were killed on a Korean plane that was shot down as it veered off course toward a Russian airport. GPS soon became a global navigation aid service. Compared to its predecessors, modern GPS devices are more integrated and more accurate. As a result of these developments, many drivers now rely on GPS vehicle navigation systems to avoid getting lost.

What is Global Positioning System (GPS) | How Does a GPS Car Navigation System Work?


How GPS works on cars in 2021

GPS car navigation systems can be factory-installed in new autos or purchased as an add-on. Combining the use of signals from satellites with interactive maps, GPS vehicle navigation systems can arrange the routes to a given location depending on the variety. Some GPS vehicle navigation systems are connected to traffic information sources, enabling them to automatically address construction and congestion when determining the best route. If the driver misses a chance, the GPS vehicle navigation systems can quickly correct the error with the updated route. Providing voice or visual instructions, these units can also help drivers find the nearest gas station or restaurant of their choice.

Once your position has been determined, the GPS unit can calculate other details, such as:

• Speed

• Giving

• Track

• Distance travel

• Distance to your destination

• Sunrise and sunset time

GPS Satellite system

The 31 satellites that currently form part of the GPS space orbit around the earth about 12,000 miles above us. These satellites are constantly moving, forming two complete orbits in less than 24 hours. Th ey travel at a speed of about 4,000 miles [7,000 km] an hour. Small rocket boosters keep each satellite flying in the right direction.

Here are some interesting facts about GPS satellites:

• The official USDOD GPS name is NAVSTAR

• The first GPS satellite was introduced in 1978.

• A full collection of 24 satellites was completed in 1994.


• Each satellite is designed to last about 10 years. Replacement is always built and presented in orbit.

• The GPS satellite weighs nearly 2,000 pounds [2,000 kg] and is about 170 feet [17 m] wide with expanded solar panels.

• GPS satellites are powered by solar energy, but have backup batteries inside, in the event of a solar eclipse.

• Transmission capacity of 50 Watts or less.


Stay updated

Annual update of GPS car driving maps on board is recommended. Due to the volume of changes on the roads such as new exits and additional points of interest such as banks / ATMs, petrol stations, restaurants and hotels, updates are needed to maintain the efficiency of GPS vehicle navigation systems. Map updates are available for purchase from manufacturers of GPS vehicle navigation systems.

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