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Chapter 1473 We are the world leader in this aspect

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    Fortunately, the head of the headquarters¡¯ face was mostly covered by the hood of the dust-proof suit, otherwise the head of the headquarters¡¯ jaw might have been shocked.

    Not only the head of the headquarters, but also other accompanying personnel. There is no way, the power of 17 microwatts simply subverts people's imagination.

    You must know that the largest power consumption in navigation satellites, in addition to the communication system responsible for contact with the ground, is the core atomic clock. The reason why this is mainly determined by the physical characteristics of the atomic clock, because without a force exerted by the outside world, it is impossible to move the atoms.  When vibration occurs, it is impossible to accurately understand the concept of time because of the frequency of vibration, and it is impossible to conduct high-precision navigation on the ground.

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

    Because of this, when it comes to the research and development of navigation satellites, countries around the world have only two paths. One is to reduce the power consumption of atomic clocks as much as possible. In this way, 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 crude, that is, using solar panels with a larger expansion area and storage batteries, using a launch vehicle with greater thrust, and ignoring the structural weight of the navigation satellite to complete the actual deployment.

    Although the first technical path does have many advantages, it is too technically difficult. Let alone ordinary countries, even if the technology is as powerful as free and beautiful rooms, when deploying the first generation of GPS satellite navigation systems, the second type is also used.  The technical path is to use high-thrust launch vehicles to achieve deployment regardless of the weight of the satellite.

    In the 1990s, with the advancement of technology, the power consumption of the atomic clocks used in the second and third generation GPS of free and beautiful rooms was reduced, which emphasized cost control.

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

    From the bottom of their hearts, the Russians are envious of the low power consumption and low cost of the Free and Beautiful Room. The problem is that their national power is limited and they simply cannot devote resources to such time-consuming and labor-intensive projects. Therefore, the Russians¡¯ technical route  It is also the wildest thing, that is, working hard can produce miracles. Anyway, Russia has a lot of experience in aerospace. As long as you think it is acceptable, it is a good thing that can be used.

    Europe has neither the technology of Free America nor the old foundation of the Russians, but it still wants to develop a low-cost, high-quality "Galileo" satellite navigation system. What should we do?

    The stupid Europeans have come up with another way, which is to improve the power conversion efficiency of solar panels. After all, in the 1990s, Europe's photovoltaic industry was the only one in the world, and this was why Europe was talking about going green every day at the turn of the century.  To rely on environmental protection.

    Since it has such a technical foundation, Europe will naturally not leave it alone. Doesn¡¯t it have the advanced technology of atomic clocks?  Don¡¯t you have a launch vehicle with a large payload?

    I can just increase the power generation capacity of the satellite!

    So Europe suddenly embarked on the third technical path, which is to improve the power conversion efficiency of solar cells.

    Compared with these three giants, the domestic navigation system can be said to have nothing to offer, and that¡¯s fine. The key is that the overall budget for the navigation system is not large. Therefore, while lagging behind in all aspects, the domestic navigation system has to keep up with the freedom and beauty.  As with time, we advocate cost control.

    The combination of various factors has led to the domestic navigation system being like a professional marathon runner bound by countless shackles. Not to mention speeding up, it is considered lucky to be able to finish the whole race without dying of exhaustion.

    This is why when the head of the headquarters proposed to launch the second-generation satellite navigation system in April next year, many professional and industry leaders remained silent. The technology was immature and there were no high-thrust rockets for high-load launches. More importantly,  The budget is still limited, so it means that it doesn¡¯t matter what you want. Even if the gods come down to earth, they can¡¯t make such a pot of raw rice.

    As a result, a semiconductor production factory in China Tengfei Holdings found that even the gods that could not be done by the gods were made by China.

    You say it¡¯s irritating or not!

    However, the irritation was yet 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 use a 793-nanometer wavelength laser to excite rubidium atoms and hydrogen atoms.  light source¡­¡­"

    "Wait a minuteyou also used this technology in a hydrogen atomic clock?" the head of the headquarters asked in surprise.

    Zhuang Jianye nodded: "Yes, after all, the hydrogen atomic clock is the most mature technology path among atomic clocks and is the best backup equipment for navigation satellites. In addition, the atomic excitation light source is universal for atomic clocks, so we  Vert the rubidium atomic clock's 793-nanometer wavelength laserWhen the straight cavity was applied to the hydrogen atomic clock, we did not expect to achieve better results than we expected. It not only greatly reduced the total structural weight of hydrogen atoms, from 90 kilograms in the past to the current 35 kilograms, due to the reduction of components,  The cost has also been reduced by 37%. The only drawback is that the power consumption is still a bit high. 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 finally breathed a sigh of relief. Fortunately, there are pros and cons. If everything were perfect, wouldn¡¯t they become gods?

    So a head of the headquarters subconsciously asked: "What is the power consumption of your hydrogen atomic clock?"

    "I feel ashamed to say it" Zhuang Jianye said with some shame: "For so many years, we can only control it at 15 watts."

    "I, you m"

    As soon as these words came out, the head of the headquarters who asked the question couldn't help but uttered a curse word. Fortunately, reason defeated his sensibility later, and he followed up by grabbing Zhuang Jianye's neck and shouting: "Isn't this shameful?"  Press it down hard.

    Not only the leader of the headquarters, everyone present had the urge to rush forward and beat Zhuang Jianye. The power consumption of 35 kilograms and 15 watts is already very low. You must know that an incandescent lamp that weighs less than a kilogram can still  It requires more than 20 watts. Is 15 watts too much to drive a 35kg precision device?

    Not only is it not much, but it is so low that it is outrageously low. Not to mention at home, even abroad, this is a first-class level.

    "In the end, Zhuang Jianye, you still said you were ashamed, please stop pretending to be 13, okay?"

    But Zhuang Jianye seemed to really feel ashamed, and he still explained to himself: "You must know that the total power consumption of our rubidium atomic clock is less than 1 watt. If it is other technical paths, it can only achieve this level.  The key is that the solid-state laser we use is a deep ultraviolet nonlinear optical crystal, which is often called a kbbf crystal in the industry. This thing is our world leader, and it should be able to achieve very good results. However, the effect on the hydrogen atomic clock is not good.  It has met our expectations, so much so that the expected navigation load is controlled within 100 kilograms. Now it seems that it can only be controlled at around 130 kilograms at most. For space launches, for every additional 1 kilogram, the launch cost will be 1 million yuan more"

    Looking at Zhuang Jianye¡¯s melancholy look, all the big guys were in a state of confusion

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