Thanks to the fact that the face of the head of the headquarters was mostly covered by the hat of the dust-proof suit, otherwise the head of the headquarters might be shocked.

Not only the head of the headquarters, but the other entourages are the same. No way, the power of 17 microwatts simply subverts people's imagination.

It is important to know that the power consumption of navigation satellites is not only responsible for the communication system with the ground, but also the core atomic clock. The reason for this is mainly determined by the physical characteristics of the atomic clock. Because there is no external force, it is impossible to promote the atom. When vibration occurs, it is impossible to accurately time concept because of frequency vibration, and it is impossible to conduct high-precision navigation on the ground.

But to apply such a force, the limited power on the satellite cannot be avoided.

Because of this, in the research and development of navigation satellites, there are only two paths for countries in the world. One is to minimize the power consumption of the atomic clock, so that not only can most of the WeChat power be used for communication and navigation with the ground, but also It can reduce the structural weight of the satellite, reduce the power burden of the satellite, and achieve the purpose of cost control.

The second is simple and rude, that is, to use a larger deployment area of ​​solar panels and storage batteries, use a larger thrust launch vehicle, ignoring the structural weight of the navigation satellite to complete the actual deployment.

Although the first type of technology path does have many advantages, it is too technically difficult, let alone ordinary countries, that is, technology is as strong as freedom and beauty. When deploying the first-generation GPS satellite navigation system, the second type is also used. The technological path is to use a high-thrust launch vehicle to achieve deployment regardless of the weight of the satellite.

In the 1990s, with technological advancement, the power consumption of atomic clocks used in the second and third generation GPS of the Free Beauty Room was reduced, which emphasized cost control.

The problem is that there is only one free and beautiful room in the entire solar system, so the current low-power, low-cost entire solar system is only one.

From the bottom of their hearts, the Russians are envious of the low power consumption and low cost in the free and beautiful space. The problem is that their own national power is limited, and they can't devote resources to such time-consuming and labor-intensive projects. So the Russian technical route It is also the wildest, that is to work hard for miracles. Anyway, Russia has a lot of aerospace skills. As long as you feel comfortable, it is a good thing that you can use.

Europe has neither the free and beautiful technologies nor the old Russian foundations. It also wants to develop a low-cost, high-quality "Galileo" satellite navigation system. What should we do?

The Europeans of Chicken Thief came up with another way, which is to improve the power conversion efficiency of solar panels. After all, in the 1990s, the European photovoltaic industry was the only one in the world. Rely on environmental protection.

Now that it has such a technological foundation, Europe will naturally not let it go. Isn't it advanced technology without atomic clocks? Isn’t it a launch vehicle without a large load?

I just need to increase the power generation of the satellite!

So Europe abruptly walked out of the third technological path, that is to improve the power conversion efficiency of solar cells.

Compared with these three giants, it can be said that there is nothing to do in China. That's all. The key is that the overall budget of the navigation system is not large. Therefore, in the case of backwardness in all aspects, the domestic navigation system has to be as free and beautiful. The same time, advocate cost control.

The combination of various factors has caused the domestic navigation system to be tied to countless professional marathon runners.

This is why the head of the headquarters proposed that when the second-generation satellite navigation system was launched in April next year, many professional and industry leaders were silent. The technology is immature, and there is no large-thrust rocket for high-load launches. More importantly, The budget is still limited, which means there is nothing to do.

As a result, I visited the semiconductor manufacturing plant of China Ascendas Holdings, but found that the things that even the gods could not do were made by China Ascendas. That's all, the key is that it is delicious and delicious!

You say irritating but not irritating!

However, the irritating thing is still to come. Zhuang Jianye took out a set of vertical structure cavities for testing, and said to the head of the headquarters and others: "We are using a 793-nanometer wavelength laser as the excitation of rubidium atoms and hydrogen atoms. light source…"

"Wait... You also applied this technology to the hydrogen atomic clock?" the head of the headquarters asked in surprise.

Zhuang Jianye nodded: "Yes, after all, as the most mature technology path among atomic clocks today, hydrogen atomic clocks are the best backup equipment for navigation satellites. In addition, atomic excitation light sources are universal in atomic clocks. The application of the 793-nanometer wavelength laser vertical cavity of the rubidium atomic clock to the hydrogen atomic clock did not expect to achieve better results than we expected. It not only greatly reduced the total structure of hydrogen atoms, from 90 kilograms in the past to the present 35 kg, due to the reduction of components, the cost has also been reduced by 37%. The only drawback is the power consumption, which is still a little higher. Our next direction is to reduce the power consumption of the hydrogen atomic clock..."

Listening to Zhuang Jianye saying that their products also have shortcomings, everyone present was finally relieved. Fortunately, the advantages and disadvantages. If everything is perfect, wouldn't it be a god?

So a leader from the headquarters subconsciously asked: "Then what is the power consumption of your hydrogen atomic clock?"

"Ashamed to say..." Zhuang Jianye was a little ashamed: "Where so many years, it can only be controlled at 15 watts."

"I you M..."

As soon as the words came out, the headquarter leader who asked the question made a swear word, but he couldn't help but rushed out. Fortunately, his rationality defeated his sensibility, and he would follow Zhuang Jianye's collar and shout: "This TM is still ashamed?" Suppress it abruptly.

Not only the headquarter leader, but everyone present had an urge to rush up and beat Zhuang Jianye. The power consumption of 35 kilograms and 15 watts is already very low. You must know that the incandescent lamp weighs less than a pound. For more than 20 watts, does 15 watts drive a 35 kg precise device?

Not only is it not much, but it is actually low to an outrageous level, let alone at home, even abroad, this is a proper first-rate level.

In the end, Zhuang Jianye, you ND still said you were ashamed, don’t pretend to be 13, okay?

But Zhuang Jianye seemed to really feel ashamed, and he explained to himself: "We must know that the total power consumption of our rubidium atomic clock is less than 1 watt. If it is other technology paths, it will be enough. The key is that the solid-state lasers we use are deep ultraviolet nonlinear optical crystals, also known as KBBF crystals in the industry. This thing is our world-leading existence. It should be able to achieve very good results. As a result, it has no effect on hydrogen atomic clocks. Our expectations have been met, so that the expected navigation load is controlled within 100 kilograms, and now it seems that it can only be controlled at about 130 kilograms at most. For space launch, for every additional kilogram, the launch cost will increase by 1 million yuan..."

Seeing Zhuang Jianye's melancholy look, all the big guys are messy in the wind...

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