Since the emergence of China's Beidou, there have always been such "voices" that China's Beidou is inferior to the American GPS, worse than the American GPS, and the facts tell everyone that the United States is increasingly afraid that China's Beidou will surpass Taiqian.
No, from the foreign media "Spacenews" openly pointed out that with the continuous improvement of the European and Chinese systems, the members of the PNT advisory board questioned the advocacy of the US side for GPS, clearly stating the problem of "backwardness".
So, do you say that if China's Beidou lags behind the US GPS, do you still need the United States to worry?That's really "too much to worry about", what the hell is going on?Let's take a closer look.
That's right, there are four major satellite navigation systems in the world, namely the Beidou Satellite Navigation System (BDS) and the United States GPS, the Russian GLONASS, the European Union Galileo, of course, Japan, India and other regional mobile, and each system has its own characteristics, I only talk about the United States GFS, China's Beidou problem.
The GPS of the United States is a "military and civilian" dual use, which is public, and it is the same as China's Beidou, mainly due to the composition of three modules, namely the space segment, the ground segment and the user segment, which can also be used worldwide to provide high-precision, high-reliability positioning, navigation and timing services for all kinds of users around the world.
The biggest difference between China's Beidou and the United States GPS is that it has the ability to communicate short messages, which is not available in the United States GPS and other satellite navigation systems.
This function can be located in the area of "no signal", which is equivalent to a function used in an emergency, and some people in China have used it.
The maximum length of a single short message is 14,000 bits, which is equivalent to about 1,000 Chinese characters.
So, on the whole, this function is a "life-saver" for many outdoor activities and people who like challenges.
To put it bluntly, this is a function similar to what everyone calls "direct connection to satellites". Modern technology is not yet very mature and has many limitations, so the ability to communicate in short messages can still be helpful at certain times.
Generally speaking, there are three main characteristics:
First,Compared with other satellite navigation systems, the Beidou system has more high-orbit satellites and strong anti-occlusion ability, especially in low-latitude areas.
Second,Beidou provides navigation signals at multiple frequencies, which can be selectively converted automatically to achieve stronger services.
Third,It has the characteristics of positioning, navigation, timing, satellite-based augmentation, ground-based augmentation, etc., which is equivalent to all-round support in space and on the ground.
Therefore, although the construction of China's Beidou is very late, it is still quite good, and the innovation achieved in many technologies is worthy of recognition.
It's like using atomic clock seamless switching technology – allowing the hydrogen clock and rubidium clock to work at the same time, and if there is a problem with either one, the switch is immediately switched to the other, and the phase error is only 20 picoseconds (1 picosecond equals one trillionth of a second), and the user has no feeling.
The advantage of this technology also makes China's Beidou satellite about 10 times more accurate than the American GPS navigation system, which is only one second away every 3 million years.
Of course, the United States also has its own advantages, that is, the development time is early, the coverage is large, and it is indeed strong in terms of accuracy, but in terms of regional services, it may not be able to be stronger, and the United States GPS is more turned to militarization. This disclosure of foreign media is also a manifestation of militarization.
However, I would like to take the lead in emphasizing that my country did not say "military" for Beidou.
That's right, Andrew Menschner, the head of the U.S. Space Force, publicly stated at the annual meeting of the National Advisory Committee on Space-Based Positioning, Navigation, and Timing that the U.S. must quickly increase its ability to control GPS, because there are 31 satellites in orbit in the U.S. GPS constellation, and only 17 of them have L5 capabilities.
And, most importantly, since 2014, it has only been used for testing purposes, signaling speeds, which has been delayed for decades and is expected to be used on a large scale as soon as 2025.
For the problem, they think, it's a worrying one, thinking that over time, other satellite navigation networks such as Galileo in Europe and Beidou in China may surpass GPS in terms of functionality and quality of service, which is something that the United States is very afraid of.
Moreover, the PNT Advisory Board openly pointed out that the U.S. GPS is now on par with Beidou and Galileo, but is lagging behind.
Therefore, it is necessary to quickly launch the US GPS 3F satellite, which is equivalent to the third generation of US GPS.
Judging from the layout, there are only 6 GPS 3F satellites in operation, so it is expected that a new round of launches can be carried out quickly to give the United States the upper hand.
However, the U.S. Space Force is still far from sufficient for the overall program, because in addition to the transportation capacity of the L5, the first GPS 3F entire system, which is expected to be launched in 2027, is much slower in time.
See?Some people have always said that China's Beidou is not as good as the United States GPS, and the United States itself is afraid, and it cannot be said that China's Beidou is completely bullish, but the enhancement of China's Beidou is indeed a "little afraid" of the United States, and China's Beidou is still in the global layout, so the future market expansion must be a trend.
That's right, China's Beidou is not limited to this moment, and a new round of Beidou system research and development is also on the way.
According to China's public information, by 2035, China will complete the next-generation Beidou system constellation networking, build a backup enhancement system for spatio-temporal information services, deploy multi-source fusion and high-reliability PNT terminals, complete the experimental application of PNT technology in indoor, underwater, space and other special areas, complete the construction of a national comprehensive PNT system, and provide systematic PNT services.
See?In the future, China's Beidou can be used in space, and perhaps it can also support China's deep space exploration. This also shows that the United States is constantly enhancing its GPS, and the enhancement of China's Beidou is also emerging.
Therefore, some people have always said that China's Beidou is not very good, in fact, it is completely "misunderstanding", let's put it this way, the United States does have a glorious moment, but the rest of the world's systems are not "vegetarian", and the gap between them is widening, and even some areas are getting better.
This also shows that success is not permanent, and other countries are constantly developing, so it is possible to surpass one day.
This is just a matter of time, at least China's aerospace can still confront the United States, otherwise every time China carries out any mission, the United States is highly concerned, and there is a reason, because it is afraid that China will lead in some areas, and this is the reason.