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Where Are You?
All through history, people have found their way around by looking at the sky. Travellers have used the sun, moon and stars to navigate through forests or sail to distant lands. Today, there is a much easier way to get around. All you need is a device called a GPS receiver to tell you where you are and how to get where you’re going. ‘GPS’ stands for Global Positioning System. A GPS receiver can work anywhere on Earth, except for deep underwater or inside deep caves.
GPS works by using satellites in space. The satellites send radio signals to Earth. On Earth, a GPS receiver device, such as a smartphone or a car’s navigation system, receives the signals. The GPS device uses complex maths to figure out how far away it is from the satellites. That’s how it knows where you are.
GPS has become an important part of our society. It is hard to imagine life without it! Many people use GPS every day. For example, drivers can use GPS systems to get directions, traffic reports and suggestions for places to stop for food and petrol during a trip. GPS is also popular with people who do outdoor sports. Runners can use it to track their speed and distance. People travelling through the wilderness on foot, on a snowmobile or on skis can all use GPS. It helps them keep track of where they are and find their way home.
Sometimes, GPS is even used to help people who are in trouble. A GPS device can transmit a vehicle’s current position to police, firefighters or medical workers in an emergency so they know where to go to help. It relays information through radio signals so helpers know exactly where the vehicle is located. The valuable technology has helped save thousands of lives.
The technology in GPS devices is used for many different purposes. For example, GPS devices can be used to track moving objects, create maps and help aeroplanes and ships stay on course. People can even use GPS with their pets! Some pets wear collars or chips equipped with a GPS tracking device so they can be easily found if they get lost.
GPS has also become very useful in the field of science. Scientists have figured out ways to use GPS for monitoring earthquakes and volcanoes. GPS can also be used to measure water levels and snowfall. While working with wild animals, some animal researchers also use GPS devices. These scientists can attach small devices onto animals to track the animals’ movements and gather important data about them. Who knows how GPS will help us next?