The sun beats down on the north
现如今，卫星导航已经深入到我们日常生活的方方面面，许多人出门几公里离开导航就会迷路，不少国人更是言必称GPS，习惯性的将“导航定位”等同于美国造的GPS。但你不知道的是，智能手机和导航仪的信号来源很可能在几年之间已经“易主”——“中国造”的北斗系统，正在强势进入卫星导航产业。这不，美国GPS刚刚与北斗签署兼容与互操作协议，也算打压不成终于服软了，但这次的合作会影响我军信息安全么？
Beidou and GPS realize compatible navigation and positioning accuracy more reliable
On November 29th, committee wang li, chairman of the satellite navigation system in China and the United States, Jonathan margolis assistant deputy secretary of state under the witness of China's satellite navigation system RanCheng its director of office of management and the state department's office of space and advanced technology David Turner, deputy director of the signed "beidou compatible with GPS signals and the interoperability joint statement.
According to the statement, the two satellite navigation systems have achieved radiofrequency compatibility under the framework of the itu, achieving interoperability of civilian signals, and will continue to conduct compatibility and interoperability cooperation. The beidou satellite navigation system and the GPS global satellite navigation system are radiofrequency compatible under the framework of the itu, and the two systems' civilian signals B1C and L1C are interoperable, the statement said. Users using both beidou and GPS civilian signals can enjoy better services without significantly increasing costs. The signing of this statement indicates that beidou and GPS can achieve signal compatibility in the design and construction of satellite navigation system, further improve navigation and positioning accuracy, and better serve users all over the world.
According to the introduction, the compatibility and interoperability between the two satellite navigation systems is very important. In short, compatibility and operation means sharing together, so that the public can enjoy better services. The realization of compatibility and interoperability between China beidou and the us GPS system will further promote cooperation among members of the world satellite navigation family. China and Russia have already signed an agreement on compatibility and interoperability between the beidou satellite navigation system and the glonass satellite navigation system.
The construction of the beidou 3 global network began on November 5 when two beidou 3 satellites were launched. There is also a planned beidou 3 launch this year.
Beidou's performance is so advanced that, in theory, only three satellites are needed to locate anywhere in the world, and if there are four satellites, enough accuracy can be ensured.
In most cases, the beidou and GLONASS systems are flat, and in some cases the beidou system is superior to GPS and GLONASS systems. Technically, beidou 3 will have 35 satellites in orbit, while GPS and glonass will each have 24. The constellation configuration of the beidou system is also superior to that of GPS and glonas. The beidou system has a high orbit satellite, which is less shielded during our positioning. Because the earth is spherical, if the satellite's orbit is low, the electromagnetic wave propagating in a straight line will be easily blocked when it comes to high buildings. So beidou's high-orbit satellites are much better than GPS and glonass. China has conducted experiments in southeast Asia to prove that the beidou system is better than GPS. The beidou system developed relatively late, but it has learned a lot from the experience of GPS and glonass, so as to realize the backward position.
The launch of beidou 3 will enable a global network, the equivalent of the current GPS, to be used anywhere in the world. The former beidou ii only covers the asia-pacific region in a regional way, and the global network of beidou iii will fit well with the "going global" strategy of One Belt And One Road. Beidou 3 is expected to cover countries along the One Belt And One Road line by 2018, which will have an impact on many of the strategies our country advocates. It's like sharing bikes, they're all being deployed overseas, and if our beidou navigation system hasn't been up to date, these bikes can only use GPS navigation systems overseas.
In the past five years, beidou technology has been continuously integrated with new technologies and economies such as Internet + and big data. This gives the beidou system the opportunity to overtake other navigation systems in the world, such as GPS, and the beidou technology integration new economy will continue to bring better service to users around the world.
Whether military or civilian, the beidou is of great importance to our country, and it is not an exaggeration to call it "a national weapon of great importance". The signing of the compatibility and interoperability agreement with GPS marks a historic step in the development of beidou, which not only reflects the strength and status of beidou, but also shows the strong confidence of China's military industry.