Some media reports, China’s first six Compass navigation satellite has been in the early morning of November 1 launch. This is the launch of the first four this year, Compass series of navigation satellites. So, Compass navigation satellite system? Where the current development stage? Features what is it? Now we come to connect the voice of a reporter Zhen-Xi.
Moderator: give us a broad overview of Compass satellite navigation system under development.
Reporter: Compass satellite navigation system developed by China’s own three-dimensional satellite positioning and communications systems, some people compare it to China’s own GPS. Compass Systems was founded in 2000. April 2007, China launched its first navigation satellite Compass II. This time is the sixth launch satellites. Then according to the report, China Compass navigation system plans the deployment of 35 satellites, this system provides positioning accuracy of 10 meters open civil service and a more secure military and authorized service accurate.
Moderator: I know that many countries in the world to develop satellite navigation system. Well, compared to other countries, satellite navigation system, what are the characteristics of the Big Dipper or competitiveness?
Reporter: As you said, a lot of the world’s major powers in the field of satellite navigation systems began to martial arts. Have been built or are currently networking with global satellite navigation system is mainly the U.S. GPS system, Russia’s GLONASS system, the European Galileo system and China’s Compass system. Among these, GPS more mature, and people are most familiar. Russia’s Grove Corners will be completed this year networking. In addition, Japan has also launched a navigation function with the quasi-zenith satellites, India is preparing to launch regional navigation satellite. So, what is China’s Compass system features yet. First of all, it and other satellite navigation systems, with navigation and positioning, velocity, and timing functions. But it is also unusual in that, that is, text messaging, users can send through the Compass system, more than 100 words of text. So what specific advantages, we have to listen to my interview is how the National Defense University professor Li Li said.
Li Li: The first of its advantages is that it can locate and can communicate, this is the other satellite navigation systems do not have. We know that during the earthquake, it is the function of short message packets provided us with great convenience. The second advantage lies in its coverage of the future particularly that we are not blind to the design. And I think there is a very clear point, while both rich in its use of GPS signals, can greatly improve its accuracy, in this sense is very large.
Moderator: Although the Compass system has so many advantages, but so far, the use of Compass crowd is not very extensive. So, Compass system is now developed to what stage? When will it be more popular?
Reporter: On this question, I first held this year at the annual meeting of China Satellite Navigation also asked academic Compass satellite navigation system, the chief architect of Sun Jiadong Academy of Engineering. He told me that Compass satellite navigation system has been launched into the network stage, the next will be in accordance with the three-step strategy to implementation.
Sun Jiadong: Beidou system in three steps. The first step is to carry out the three stars are in synchronous orbit, in fact, do some experiments, training our team to improve our level of development; second step is to engage in a regional system, you need 13 to 15 satellites and is now actively organizing launch, it is estimated one to two years to complete the task; now starting to also being developed to the global network.
Reporter: Sun Jiadong academicians also told me that according to the system construction of the overall plan, by 2012 or so, the system will first have covered the Asia Pacific region positioning, navigation and timing and short-message communication service capabilities; 2020 to build global coverage of the Big Dipper satellite navigation system. By that time, perhaps most of us in cars, mobile phones are used on the Compass satellite navigation system, not a GPS.








