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China building more accurate navigation system

China: China is building a highly accurate navigation system, the Ministry of Science and Technology has said. The ministry recently released a report on its website on a strategy seminar held in Beijing to discuss the latest progress in navigation technologies.

The National Remote Sensing Center of China said at the seminar that a new navigation system had been successfully tested to pinpoint positions within 0.1 metres in outdoor and 3 metres in indoor areas.

The Xihe system, named after a god in ancient China, has already been tested on fieldwork devices.

The centre plans to develop an urban positioning system, first in large cities like Shanghai and then across the country by the end of the 12th Five-Year Plan (2011-15).

“When you”re using a navigation system like GPS in your car, the pinpoint accuracy is about 10 metres, so you will sometimes find that your actual position differs from what is shown on the navigator,” said the project leader at the National Remote Sensing Center, on the condition of anonymity.

“But if you”re using the Xihe system you will not have that problem, because the accuracy is 0.1 metre,” the director said.

The system is based on a technology known as CRP, or cooperative real-time precise positioning, which is designed to enhance the accuracy of navigation satellite systems.

Cao Jianlin, Vice-Minister of Science and Technology, said the Xihe system is China’s one the significant attempts to apply science and technology funds to solve practical problems and catch up in terms of high tech.

Source: China Daily