Guo Shucheng shook his head and said: "This is the business of each research institute itself, whoever produces the best research results will have more profits in the future, we don't care about their specific work, we only care about their exchanges with foreign countries, to be precise, we only care about the secrecy of our domestic high-tech and the price of purchasing foreign advanced technology, and the rest is up to them to decide and solve by themselves." Hehe, they probably don't want others to know, especially they don't want competitors to know, and they hide everything they do. If others know, their advanced xing may not last long before they will be learned by their opponents. ”

Qian Xuesen looked at Guo Zhuocheng appreciatively and said: "You have done a good job, and you never forget the word 'competition'. Where there is competition, there is motivation, and there is competition to make progress. ”

Guo Shucheng nodded and said, "Yes." In fact, this is also a matter of no choice, otherwise it will not work. Our country is too far behind foreign countries and has to work hard for them. ”

In Qian Lao's place, Guo Zhuocheng talked about some other technical issues, of course, many of them were forced to be asked by Qian Lao. When answering Qian Lao's question, Guo Zhuocheng was nervous all over, for fear of revealing too much stuffing, for fear of saying too many idiotic words, and he was able to cope with it several times.

When being chased by Qian Lao to ask about the relevant principles of the satellite positioning system, Guo Zhuocheng was really sweating. In his previous life, he mainly used his strength in the field of machinery, and later entered politics, how much can he know about the technology of satellite positioning systems? In his previous life, he had only seen GPS or Big Dipper profiles from the top or the media, and knew a little bit about how they worked.

This principle is also rough, and most people know it: measure the distance between a satellite with a known position and the receiver of the user, and then combine the number of multiple satellites, and calculate the specific position of the receiver. To achieve this, the position of the satellite can be found in the satellite ephemeris according to the time recorded by the on-board clock, and the distance from the user to the satellite is obtained by recording the time elapsed by the satellite signal propagating to the user, which is then multiplied by the speed of light.

During the conversation, Guo found that Qian Lao knew much more about this technology than he did. He told Guo that the GPS global positioning system in the United States had been formally developed in 95 years ago, and it was put into use in the United States in 964.

The Soviet Union was not too late in satellite positioning, and began to conduct simulation tests in 976, and also issued relevant satellites.

In fact, even China cannot be said to be without movement. Tracking the technology began almost soon after it was developed in the United States, and so far a lot of experience has been accumulated and a lot of scientific research results have been achieved. But China did not put it into testing, let alone launch a satellite. On the one hand, China's scientific research level is lacking, and many technical difficulties have not yet been broken through. Second, China lacks funds, and it is impossible to send a few satellites for scientific research under the premise that no technological breakthrough has been made. The third aspect is that there is an insurmountable gap in the manufacture of spaceborne rubidium clocks, and it is difficult to obtain accurate time information to the nanosecond level.

…… If it weren't for Professor Qian Xuesen's explanation, Guo Zhuocheng really didn't know that our country still had such a bullish existence, and Chinese scientists actually began to develop this high technology in that era, and they have made a lot of progress.

In his impression, China's "Beidou" global positioning system seems to have only started around 200 years ago. Could it be that the technology blowout that Qian Lao said when he started to enter the door included this project?

In the original history, in the 70s of the 20 th century, China began to explore the system research of satellite navigation systems suited to its national conditions, and successively put forward plans for single-satellite, double-satellite, three-star, and -5-star regional xing systems, as well as the idea of a multi-satellite global system, and took into account the problems of navigation, positioning, and communications, and other comprehensive applications, but due to various reasons, these plans and ideas have not been realized.

It was not until the 90s of the 20th century that China proposed and formulated a "three-step" plan for the independent development and implementation of the construction of the "Beidou" satellite navigation system: the first step is the experimental stage, that is, the use of a small number of satellites to complete the test task by using geosynchronous geostationary orbit, to accumulate technical experience for the construction of the "Beidou" satellite navigation system, train talents, and develop some ground application infrastructure equipment; The second step is to launch more than 00 satellites by 202 and build a "Beidou" satellite navigation and positioning system covering the Asia-Pacific region; The third step is to build a global satellite navigation system consisting of five geostationary orbit and zero geostationary orbit satellites by 2020.

Through the exchange, Mr. Qian finally knew that Guo Zhuocheng's knowledge in this area was indeed limited, so he no longer pressed him, but began to explain the specific principles of the satellite positioning system to Guo Zhuocheng.

Guo listened attentively, although he knew that he would not be able to study this in the future, and would not even set foot in this field, he still listened very modestly, and at the same time talked about the use of some GPS in his previous life, which greatly increased Professor Qian's interest. As he spoke, Guo Zhuocheng was no longer embarrassed, and he didn't feel that he was getting an axe in the class.

Guo Zhuocheng listened very carefully, Qian Xuesen felt a sense of pride in his heart, and when he was about to finish talking about technology, he said with a smile: "Haha, Director Guo, you also don't know anything?" Seeing that Guo Zhuocheng was deflated, Professor Qian was even happier, and said, "The last time you came to my house to talk about GPS, I really thought you had been studying it for a long time." The apps you just mentioned are really good and give me a lot of inspiration. If only you could calm down and participate in the research of this project, we would be more sure to catch up with and surpass the world's advanced level, and we would be able to keep pace with the United States and the Soviet Union in a shorter period of time. ”

Guo Zhuocheng smiled, did not say anything, and said in his heart: "Old Qian, you can be content." In my previous life, I didn't participate in this project, even if you didn't participate in it yourself. Your limited time and energy have been used in a lot of things that should not be used, what are the special functions of the human body, what are the qigong, how much have you delayed, you should have thanked me a long time ago. ”

Seeing that Guo Zhuocheng didn't answer, Qian Xuesen said his purpose and said, "Director Guo, I won't talk about the rest, I want to do a low-level experiment now, and I need your help." ”

Guo Zhuocheng hurriedly said: "You said, as long as I can help, I will definitely help." ”

Qian Xuesen said: "According to the development plan of our satellite positioning system, there will always be several geostationary orbit satellites and more non-geostationary orbit satellites in the sky in the future, and several satellites can be observed at any point on the ground, and the signals of several satellites can be received, and the pseudo-random code sent by the satellite can be used to calculate the distance between each other, so as to calculate the three-dimensional coordinates of the receiving point."

But for now, our country's economy is in difficulty, and satellite technology is not strong, so it is impossible and unnecessary to send so many satellites for positioning. But if you don't have shè, you can't carry out experiments in this area. These contradictions strictly restrict our development and limit our development.

We think so, since we can't build a global positioning system for the time being, let's try to build a regional positioning system, and the method adopted is to use one or two geostationary orbit satellites plus ground navigation stations to achieve it. ”

Guo asked puzzledly: "Ground navigation station?" Do they simulate satellites and send pseudo-random codes around? However, due to the topography, especially the curvature of the earth, their signals cannot travel far. ”

Professor Qian Xuesen said: "Yes, even if we increase the antenna, it is only a few tens of kilometers. That's it, we all lack funds. But we can't stop there, can we? ”

Guo Shucheng said: "I really don't have the funds, this time it's because of the funds, the fighter projects I have in hand are all combined into one, you want to squeeze oil from me, I'm afraid you can't fully meet your requirements, only part of the solution." ”

Qian Xuesen shook his head with a smile and said, "It's not that I'm looking for you for money, but I'm looking for you for a way." ”

Guo Shucheng asked, "The way?" What way? ”

Qian Xuesen said: "The way to buy the technology related to spaceborne rubidium atomic clocks. I heard that you have acquaintances in the United States and in Europe, so please find someone to contact you first, and then we will go abroad to buy them, and we will solve the funds ourselves. Of course, it would be great if you could fix part of it. ”

Guo Shucheng hesitated for a moment and said, "I want to find a way, but I'm not sure." However, I have heard that this technology in Europe is not very good. ”

In his previous life, Guo Zhuocheng heard the host say that China's spaceborne rubidium atomic clock was developed by China itself, and it was impossible to buy it from the United States at that time, and it was not possible to buy it from Europe.

"We don't have to buy their physical products, we just need their technology," Qian said. We still have some bottlenecks in theory, and although we can solve them in about five years by focusing on them, wouldn't it be better if we could solve them in a simple way? You have promised us that you will export a large number of YJ0 missiles, and we will not lack money in the future, just a stepping stone. ”

Guo Zhuocheng asked: "Then the ground navigation station is still trying?" ”

Qian Xuesen said with certainty: "Of course, if we try it, if we don't succeed 100% on the ground, our satellite will not go to the sky." Besides, the range of our cruise missiles is only more than 100 kilometers, and with a few more ground navigation stations, we can test how our cruise missiles use the global positioning system. ”

Guo Zhuocheng's eyes widened in surprise and asked, "Our cruise missiles have a range of more than 100 kilometers?" ”

Qian Xuesen nodded proudly and said, "Do you think that only your scientific research succeeds quickly?" Ours isn't slow either. ”

Guo Shucheng said embarrassedly: "We haven't produced any scientific research results." The tank is only a small fight, no fundamental improvement has been made, and the development of fighter jets has only just begun, and it can only be said that some doorways have been touched, and there is still a long, long way to go before it can be produced. ”

Seriously, Guo really didn't expect China's cruise missiles to reach such a high level. Although the range of more than 100 kilometers is incomparable with the Tomahawk cruise missiles used by the United States in the Gulf War, and the range of other people's cruisers is as high as 2,500 kilometers, as long as the relevant technology is mastered, China's cruise missiles can advance by leaps and bounds.