Super Weapon Swap System

For Qin Guan, his life has always been busy.

After returning to the capital, he spent only one day at home. The next day, Qin Guan came to the Ministry of space.

Major Yang's report has been officially submitted, and the superior is very concerned. Now, Qin Guan needs to coordinate with the Ministry of space. Here, Qin Guan finally met a large number of aerospace experts.

"Mr. Qin, we have been looking forward to seeing you for a long time." most of the space system experts present are not young. Years have left traces on their faces. When they were poor and white, they achieved zero breakthroughs one by one through self-reliance and hard work.

Now, when they know that Eagle has launched the Star Wars Program, they are also excited. In this way, they will certainly play a more powerful role in their own field.

Sure enough, the country will also formulate a space plan tit for tat. Although the scale of this plan is small, and unlike the eagle country plan, there are no science fiction space weapons, but the investment required will also be astronomical!

They are very excited.

"Hello, old sun." Qin Guan shook hands with everyone in turn: "I wanted to see you before. I haven't had a chance."

Sun Lao, one of the pioneers of man-made satellite technology and deep space exploration technology in China, has been engaged in aerospace work for 60 years and has presided over the development of 45 satellites.

The original Dongfanghong satellite was Sun Lao's masterpiece. Now, the first key project advocated by Qin Guan is the satellite navigation system. Of course, sun Lao Lai is also the chief engineer.

Qin Guan had never seen them before, but he shook hands with everyone and shouted their names at the same time, which made him more friendly. In fact, Qin Guan certainly relied on the help of his own spiritual point scanning system.

These old experts are all famous!

"President Qin, after receiving the arrangement from the superior, we conducted a preliminary demonstration on the satellite navigation system, and the result of the demonstration is that it is very difficult to start the project, which is far beyond our own existing level."

Satellite navigation system is not simple. Even in the west, it has gone through a long road and developed continuously. It took the eagle people more than 20 years to develop. What about their own side? It is absolutely impossible to develop it all at once without any technical reserves.

The era of putting satellites has passed. Satellites are very innocent. All fronts are putting satellites. They who really put satellites are timid.

Of course, Qin Guan knew that this project was not easy. If everyone could easily work out it, he would not have tried to cooperate with Europe at the beginning, because he knew that his technology was insufficient.

What happened? Cooperation is impossible, so I buried myself in my own research, and this research is also gradual. The first thing is the low difficulty double star positioning.

The principle of double star positioning was first put forward by Eagle scientists in 1982.

Compared with dozens of GPS satellites, double satellite positioning only needs two geostationary satellites. For insurance, you can also add a backup satellite. Its principle is also very simple. Take the known coordinates of the two satellites in orbit as the center of the circle and the measured distance from the satellite to the user terminal as the radius to form two spheres, The user terminal will be located on the arc of the intersection of the two spheres.

However, the user can't calculate it by himself. There must be a ground central station equipped with an electronic elevation map to provide an uneven sphere with the earth center as the sphere center and the height from the sphere center to the earth surface as the radius. The user's position can be obtained by solving the intersection of the arc and the earth's surface by mathematical method.

In other words, this kind of positioning is very simple, but compared with GPS, it is two-way and requires a ground workstation. GPS can solve it by itself as long as there is a satellite overhead to provide time information without external help.

"If we want to go step by step, let's start a double star positioning first, how about it?"

Based on the current level, if you want to make a breakthrough in the direction of Qin Guan, it's better to make a double star positioning first.

This is also a plan they discussed and decided after a few days of meeting. It is step by step, and it is impossible to reach the world advanced level at once.

Qin Guan shook his head: "this positioning accuracy is not high enough. Moreover, it also needs to transmit signals, which is not conducive to concealment. Moreover, it can only be regional navigation. Therefore, it is not suitable for our current needs."

The advantage of dual satellite navigation is that it can build a system for regional navigation and positioning in a short time at a lower cost.

However, compared with the real global positioning system, it has many defects. Synchronous satellite orbit is destined to be unable to navigate high latitude targets and the other side of the earth. It is destined to be a regional navigation and positioning system.

The progress is not high enough, that is, it is about 10 meters. You know, the positioning accuracy of the GPS signal reaches the meter level. The bomb using this navigation says that if it flies from the left window, it will never go in from the right window. It is quite sci-fi.

The biggest disadvantage is that it has to transmit signals. In the military, once it transmits signals, it means its own exposure. Although it is to benefit the world, it is certain that it is first destined to be a military system. With it, this precision guided weapon can be widely used with low-cost joint attack ammunition.

"However, we don't have such high technology. If we directly develop to the global positioning system, it will be quite risky in technology," Sun said.

"Yes, no matter what else, our satellite needs a high-precision atomic clock, so we can't do it," another expert said.

For the accuracy of navigation, the most critical is the time signal. This time signal can only be provided by the most accurate atomic clock. Its accuracy can reach 1 second every 20 million years, and the error is thousands of miles. The more accurate the time is, the higher the positioning accuracy is.

Why did you go to Europe to cooperate? It is because western countries monopolize the technology of spaceborne atomic clock and implement the policy of blockade and embargo on China. Without this technology, navigation is impossible.

Later, through self-reliance and hard work, China finally succeeded in mastering key technologies and even successfully anti surpassing in some aspects. When the 17th beidou-3 networking satellite was launched, it was the satellite with the strongest function, the most signals, the largest carrying capacity and the longest service life in beidou-3 system. Moreover, the satellite is equipped with a leading generation of rubidium atomic clock, making the satellite the time reference satellite of the whole Beidou system, and its positioning accuracy has been improved by one to two times.

"What if there is a reference?" Qin Guan asked sun.