Chapter 980: How about satellite navigation

Professor Lin has been waiting for Qin Guan, because Professor Lin has been instructed by the Navy to say that President Qin will solve the problem of precise navigation. Since then, he has been waiting until now.
Professor Lin knew that Qin Guan was very busy, so he didn't take the initiative to look for it. Seeing Qin Guan today was both expected and unexpected.
Professor Lin came to the office. At this time, there was no one else inside. He poured tea for Qin Guan with a smile, which made Qin Guan flattered.
"Professor Lin, you rest, I will come by myself." Qin Guan said.
For these old professors, Qin Guan couldn't have the most respect. At the beginning, they dedicated themselves to serving the country, gave up the superior conditions abroad, and resolutely returned to China and dedicated their lives to the motherland.
Even afterwards, he was persecuted during the turmoil, and still did not change his original intention.
It is them that make the motherland truly strong, otherwise, it would not be possible to drive the development of the entire country with just a system.
As for the kind of people who have worked abroad for a lifetime, dedicated their youth and wisdom to foreign countries, and when they are old, they return to China to enjoy the good fortune. Such people are contemptuous in Qin Guan's heart.
Professor Lin sat down and said: "Mr. Qin, we now also know that the liquid-suspended gyroscope is not accurate enough. We are also working on laser gyroscopes. But now, foreign countries are technically blocking us, and we can't see the real thing. I also don’t have processing capabilities, so it’s very difficult to continue to improve accuracy."
These are the main problems facing Professor Lin. These problems are no longer a problem in Qin Guan.
"I have some technical materials from the secret front. Now, they are all handed over to Professor Lin." Qin Guan said, the Xiucai had already pushed in an extra-large box, and inside this box was Qin Guan. Technical information exchanged.
Professor Lin pushed the glasses, opened the box, picked up the top one first, and looked carefully.
They are all in foreign languages, which is nothing to Professor Lin. Professor Lin's Ph.D. was studied in Eagle Country. Now, Professor Lin has read a few articles and put them down: "Yes, it explains the various principles of laser gyroscopes carefully, which is consistent with our research. It must not be wrong, but if we want to manufacture Otherwise, the machining accuracy is not enough."
The precision of the laser gyro is high enough, and at the same time, it needs enough precision to process it. This is also the biggest problem that bothers us.
"In terms of processing, you can take it to Prairie City, where the northern heavy truck factory has a special processing workshop with high precision and can also undertake external processing tasks." Qin Guan said: "If there are still difficulties, special processing is needed. Equipment, let me know."
Don’t worry about processing. You have a weapon material cemetery to exchange these materials, and a machine tool cemetery to exchange processing equipment. After all, in later generations, laser gyros are too common. Even a model airplane may contain laser gyros.
"We study and process these materials, and it may take six months to one year." Professor Lin said: "Mr Qin, thank you for your great support!"
"Fortunately, our electronic technology is developing very rapidly. There will be no problem in processing the output signal of the laser gyro. If you need an advanced computer, you can say hello to Hanxin Technology."
Only a gyroscope is not enough. The accelerometer and gyroscope must be directly mounted on the carrier, and the attitude matrix is ​​calculated in the computer in real time, that is, the relationship between the carrier coordinate system and the navigation coordinate system is calculated, and the carrier coordinate system The accelerometer information is converted to the information in the navigation coordinate system, and then the navigation calculation is performed.
"Thank you President Qin." Professor Lin was rude: "Then give us ten computers, how about?"
Hanxin Technology’s computers have always been in short supply. Even if they are mainly supplied domestically, many units are rushing to get them. Capital University of Aeronautics and Astronautics has already divided a batch of them, but they have been given to the School of Computer Science. Professor Lin did not touch To.
Qin Guan smiled: "This is nothing, but unfortunately, no matter how advanced the laser gyro is, there will always be errors."
Errors can only be reduced, and errors cannot be eliminated. This is the basic physical principle.
"Yes, so we have to superimpose starlight navigation on the basis of inertial navigation."
In terms of navigation, starlight navigation has been used for hundreds of years. Observing the stars in the sky for navigation is the most common way.
However, this ancient method cannot meet modern needs.
"With the help of stars in space for navigation, there are conditions. If we can use satellites to achieve navigation, that would be great." Qin Guan said.
Qin Guan's words made Professor Lin's eyelids suddenly jump.
Professor Lin is already old. He is nearly seventy years old. It is long time for him to take care of his life. He just can't live by himself, so he teaches students and will continue to engage in scientific research. Of course he knows the world development in navigation.
Eagle country has already started to engage in global satellite positioning system.
Satellite navigation technology is a technology that uses navigation satellites to navigate and locate users on the ground, ocean, air and space.
The use of the sun, the moon and other natural celestial bodies to navigate has a history of thousands of years. Although the idea of ​​artificial celestial navigation was proposed as early as the second half of the 19th century, it was not until the 1960s that artificial satellites were developed and realized.
Although the GPS system is well-known to future generations, the Eagle Navy’s demand for satellite navigation systems is quite urgent. Therefore, they built the Meridian satellite navigation system in 1964 and delivered it to the navy for civilian use in 1967.
The trajectory of the satellite can be determined by the Doppler frequency shift curve measured when the satellite passes. If the precise trajectory of the satellite is known, the location of the receiver can be determined. This is the principle of satellite navigation.
The Eagle Nation was the first to engage in this, also in order to solve the problem of precise positioning of the Polaris nuclear submarine in deep sea navigation and military missions, and it was named "Meridian Project."
In 1973, Eagle Country began to develop the "Navigator" global positioning system.
After more than ten years of development, the GPS global positioning system was finally successfully developed. To truly cover the world, it has been twenty years.
Of course, the Han State Navy also has an urgent need, but everyone knows that relying on Han State's technology, don't expect it now.
At this time, Qin Guan mentioned the technology of using satellites for navigation. This technology should also be developed in Han!
Qin Guan is well aware of the strategic significance of establishing a global navigation satellite for the country. It can be said that it can be juxtaposed with rockets and nuclear weapons and become the country's most important weapon!