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Global Positioning System is used by an individual to determine that at which place he is located and it is also used to locate the other things as well by any individual. An aviation GPS system has gained so much popularity due to its accuracy and user friendly nature that in the field of aviation these kinds of devices are being used heavily by the companies. First of all the GPS system was tested with the help of a satellite system in 1978 and now after almost thirty years of its first experiment the GPS system has become the need of aviation field.

Aviation headsets that are used for the purpose of GPS are sold widely all over the world to the aviation companies. In United States of America, the GPS system is maintained and handled by the Defense of United States and for the convenience of their citizens they allowed every citizen to use this tracking system for free. Their citizens can use this facility without paying any cost as the whole cost is beard by the Government of United States of America. A new aviation system named as Garmin aviation GPS system is deigned having extra ordinary new features that are being used only in the air crafts so with the passage of time the GPS system is progressing and introducing extra ordinary features in every new model.

Chinese astronauts returned to earth and emerged triumphant from their capsule Sunday after successfully completing the country’s first-ever spacewalk mission.

State broadcaster CCTV showed their Shenzhou 7 spaceship landing under clear skies in the grasslands of China’s northern Inner Mongolia region at 5:37 pm local time. Premier Wen Jiabao applauded at mission control in Beijing.

“The astronauts feel very good,” mission commander Zhai Zhigang said as the vessel floated down to earth on a red and white striped giant parachute.

After landing, the three astronauts were seen sipping bottled water as they were given medical examinations inside the module. They stayed inside for about 45 minutes to adapt to the Earth’s gravity before slowly crawling out of the narrow circular entrance of the capsule.

CCTV showed the astronauts each waving as they emerged and sat on blue fold-out chairs outside the capsule. They were each presented with a bouquet of flowers.

“It was a glorious mission, full of challenges with a successful end,” Zhai said. “We feel proud of the motherland.”

Saturday’s space walk, which was broadcast live and watched by crowds gathered around outdoor television screens, further stoked national pride one month after the close of the Beijing Olympics.

The spacewalk was mainly aimed at testing China’s mastery of the technology involved. Zhai’s sole task was to retrieve a rack attached to the outside of the orbital module containing an experiment involving solid lubricants.

Tethered to handles attached to the Shenzhou 7 ship’s orbital module, Zhai remained outside for about 13 minutes before climbing back inside.

A successful spacewalk paves the way for assembling a space station from two Shenzhou orbital modules, the next major goal of China’s manned spaceflight program.

China is also pursuing lunar exploration and may attempt to land a man on the moon in the next decade — possibly ahead of NASA’s 2020 target date for returning to the moon.