Chapter 1779: Beidou is about to build a network

Beidou navigation satellite!
In the past, Qin Guan just exchanged an obsolete GPS satellite in the satellite cemetery. This is definitely an extremely open behavior. After the exchange, Qin Guan didn’t bother about the follow-up. The work is completely entrusted to the experts who study satellites.
It takes a lot of effort to get this kind of satellite out. What kind of algorithm should be used for navigation, how should the signal be transmitted, what should be done with the most precise atomic clock on the satellite, and there are too many technologies to overcome.
Back then, it was precisely because the navigation satellites were so difficult that Han would contact Europa, hoping to join their Galileo satellite navigation plan.
But the result?
Galileo satellites belong to Europa. Those guys are all above it. Han will come in, yes, how much money do you need to provide, but you can’t get any technology!
After several years of wrangling, Han Guo finally discovered that it is impossible to rely on others for advanced technology. It must be done by oneself. Therefore, Han Guo learned from the pain and embarked on the road of independent research and development.
Because it is too difficult, the first thing Han State does is double-star positioning. This method requires a solution station on the ground and requires users to send information to space, so it is easy to expose.
Although there are various flaws, they were developed by themselves after all, and finally let out a bad breath. At this time, Europa is still arguing with each other. Their Galileo navigation system is just a castle in the sky.
On the basis of this first-generation dual-star positioning, Han Guo finally came up with a real global positioning system. Their Beidou satellites continued to go up to the sky. First, they were networked and applied to the country, and finally expanded to the world. The second practical satellite navigation system besides GPS.
Don’t count the bear country’s satellites, their lifespan is too short and they will be scrapped in one or two years. If you want to build a network, you have to launch them continuously. When the bear country is disintegrated, they have no money and their network can’t be maintained. Is paralyzed.
At that time, the Galileo satellites still did not come out, and they began to quarrel, saying that Han was occupying their frequency bands. However, the international rules were originally that who occupied first was whoever occupied them first, and their cunning was useless.
That is the parallel time and space of later generations. As for now, the Beidou navigation system of Han is even more unmatched. It is only in the 1980s and Beidou satellites have already begun to go to the sky!
"Is this our first satellite?" Qin Guan asked.
"No, the first satellite has already been in the sky. We tested it for a few months and thought that there was no problem. Now we are going to launch two satellites with one arrow, and three satellites will be networked. Then we can officially start the positioning test. "In front of a group of foreign personnel, Dean He began to introduce it. Anyway, this thing was originally intended to be made public and used by the whole world.
Now, of course I have to introduce it to everyone.
Qin said: "Call me when launching, I must go to participate."
"President Qin, we also want to go and see your launch procedures." Swangerang said.
The other inspectors were also very excited. Looking at them, Qin Guan was also very excited: "Yes, of course there is no problem. We welcome them."
If it was in the past, it would definitely not work, because rocket launches belonged to the military. But now, the launch vehicle is going to the world. In this regard, a special civilian company must be established. The relationship with the military will be It's getting thinner and thinner. In order to attract the attention of customers, why not take them to see?
"It seems that you have perfectly mastered the issue of missile trajectory changes." An Eagle Country expert said.
Double star with one arrow means that the launch vehicle takes two satellites into the sky at the same time. After reaching space, it releases the first satellite and makes the satellite enter the first orbit, and then the rocket continues to change orbit to reach another predetermined orbit After that, a second satellite was released.
In this case, it is almost the same as the ballistic missile's orbit change in space.
It is quite difficult to intercept a ballistic missile. It is best to detect the trajectory from the take-off stage so that it can be calculated. However, if the ballistic missile changes trajectory and changes direction in the air, the opponent cannot calculate it, let alone. Intercepted.
This is also the most convenient way to deal with the anti-missile system. Han's space technology is indeed very powerful!
After all, there are many technologies that need to be broken through. For example, launching two satellites at the same time will definitely require more thrust. It must have a high carrying capacity. Then, it is necessary to master the stable and reliable "star-arrow separation". When the technology comes out, it cannot collide, and the most suitable route must be selected to finally allow the satellite to operate stably in different orbits.
However, with the continuous development of computer technology in Han, this kind of thing that requires large-scale calculations is no longer difficult for them.
"We are talking about rockets now," Qin Guan said: "We are developing space technology to benefit mankind and to develop the economy."
Qin Guan immediately transferred the subject of the other party. Look at it, didn't we develop ballistic missiles to develop the current aerospace technology and then serve all mankind?
"Is there Long March 3? Is that the third-stage hydrogen-oxygen fuel tank?" At this moment, someone shouted again.
In the final assembly here, in addition to the Long March II, there is also the Long March III. The most special of the Long March III is that it uses a hydrogen-oxygen engine at the top level!
Qin Guan is very satisfied. Now, the topic has finally changed. Let me introduce our Long March III. After all, many customers need to launch communication satellites. They use synchronous orbits and can only be launched by Long March III. The third level is the latest technology that one has only mastered in recent years.
Liquid rocket engines use high-performance liquid fuels and oxidizers. Among all the materials, liquid hydrogen and liquid oxygen are the most efficient, and engines that use them as fuel are the most advanced.
Mastering the hydrogen-oxygen engine technology is one of the signs of a country becoming a space power. The development of high-thrust hydrogen-oxygen engines is the development trend of liquid rocket engine technology at home and abroad.
When the Long March 3 was engaged, the veteran experts strongly demanded to do this. Now it has finally come out and has become the symbol of a major space power.
There are a lot of challenges in this. Not to mention, it is not easy to process the fuel tank and the large-scale complex curved surface to be precisely formed. Welding requires technology.
Seeing that everyone was interested, Dean He introduced it.