Portable Vehicle GPS

Navigation satellites were one of the first applications of artificial satellites of the earth. And very early in the space age, scientists have realized that satellites could orbit successfully on ships, aircraft or other vehicles to enable their exact location to be determined. Global positioning (GPS) of navigation satellites. GPS constellation was introduced with the support of U.S. military forces. But it is now widespread in the public sector and commercialapplications.

Shipping, which usually consists of a sensitive radio receiver, a precise frequency reference, and an accurate clock. The idea of using satellites for navigation began with the launch of Sputnik 1 on 4 oktober 1957 Satellite navigation allows for small electronic devices to determine their position.

Navigation satellites at the end of 1950 developed. It 'a great help to transport companies, in particular for the transport of water andthrough the air. Satellite navigation systems to help pilots and ships to implement track their positions and many related information.

Satellite navigation systems have a wide range of civilian uses. They are used to measure distances, such as between buildings. They are also used to create accurate maps of remote areas of the earth.

NAVSTAR GPS satellites operate at an altitude of 10,000 to 20,000 miles. In satellite Global Positioning System (GPS) 24NAVSTAR satellites are used to determine the ranking. Whenever that broadcasts via satellite and position messages continuously. GPS is the only fully functional satellite navigation. The former Soviet Union has established a ranking system, similar to NAVSTAR, known as a world orbiting a satellite navigation system (GLONASS). GLONASS uses the same number of NAVSTAR satellites. They use 24-27 satellites in orbit around three floors. The first GLONASS satellites werein orbit were launched in 1982.