About Satellite Navigation

When Austrian physicist Christian Doppler explained his theory on the changing frequencies of sound waves in 1842, world could not imagine that it will form the foundation for the satellite navigation techniques in 1950s. What is known as Doppler Effect helped the Americans to determine the orbit of Russian satellite Sputnik. The radio signals picked up from Sputnik in different points on earth had marked Doppler Shift which gave valuable information to the American scientists about the exact orbit of the Russian satellite.

Conversely, the scientists realized that they can determine the position of a receiver from the Doppler Shift of a satellite orbiting in a known path. It was navy of the United States that established the first satellite navigation system. The same system underwent further changes and in 1990 American Military GPS came into existence. The accuracy of GPS and its capability to deliver reliable data to ships or planes from ground stations was a positive factor that helped to develop modern satellite navigation system. In the subsequent periods satellite based navigation system was made available for civilian use.

Today GPS based satellite navigation devices are of immense help to the humanity in diverse segments of socio economic life. Apart from the defence purposes, innumerable sections of pubic make use of this system. Whether it is the fishing community venturing to the seas or tourists who move about in unfamiliar territories, satnav devices have become reliable companions for them. There are no needs for depending strangers or state agencies to find their ways when stranded. Satnav devices are now unavoidable gadgets in expeditions and evacuations. Their contributions towards wildlife conservation have been acknowledged by the environmentalists.

The form and content of modern satellite devices are entirely different from those used at the advent of technology. LCD touch screens, safety cameras, preloaded maps and Bluetooth hand free calling are some of the unique features incorporated in the modern products. Apart from dedicated satellite devices, the system is now incorporated in smart phones. Many leading manufacturers of motor vehicles have satnav as a part of the original features in their latest models. Hand held devices have become a personal possession of pedestrians and cyclists as wrist watch or sunglasses. Wrist worn GPS sports watches are now available now for them.

Crystal clear 3D and 2D graphics of the maps are of immense help to the drivers who undertake long trips through difficult terrains. There are many high end tracking devices for consumers to choose from. GPS technology is now incorporated in many formats like mobile phones, wristwatches and radio receivers. They are widely used for finding out the most economical routes and to avoid hazardous roads and ultimately to save time and fuel. Post code search is yet another feature which comes to the rescue of those who travel in unfamiliar places.

The multifarious functions and features in the satnav devices are inconclusive. There is a unique product available in the market for every person for every task. It will be difficult to make out an exhaustive list due to their vastness and multiplicity. There are special websites dealing with satellite navigation and innovative products available for the consumers. Well known branded products are to be chosen to ensure quality and reliability. Online shopping is convenient and cost effective.

By: shary123

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