Vol 2 Chapter 949: Upper level

　　 If it is to simply send satellites or spacecraft and other payloads to different orbits, this general launch vehicle can do it.
　　 But if you want to send six or seven, a dozen, or even dozens of satellites to different orbits at the same time, you need an upper level.
　　 To put it bluntly, it is also a first-class rocket, but compared to the general rocket body, it is more flexible and not only has a flexible ability to change orbit. Moreover, its engine can be ignited multiple times, can run on orbit for a long time, and has a strong space transfer capability.
　　Wu Hao The reason why they developed the upper-level technology is to improve the carrying capacity of the rocket, especially the transportation capacity of deep space and different orbits.
　　 Of course, this is only one reason. On the other hand, they also hope to be able to develop multi-star technology with one stone.
　　 The one-shot multiple-star technology here is based on the original technology. Wu Hao and others have also made relevant improvements and optimizations to make its performance even better.
　　 First of all, in terms of quantity, it is different from the current multi-satellite technology in many countries, which can send two, three, or four or five satellites to the sky. Wu Hao hopes to use this technology to send more than a dozen or even dozens of satellites into space.
　　 The second is in orbit. Wu Hao hopes that this upper stage can send dozens or even dozens of satellites it carries to different orbits.
　　 At present, the multi-satellite technology has been developing very rapidly. Companies in various countries have experimented with or have used this technology, and successfully sent dozens or dozens of satellites into space.
　　 Like the Starlink project carried out by Musk, it sent sixty satellites into space at a time, which can be said to be very remarkable.
　　 However, these multi-satellite technologies can only send these satellites to the same orbit. In other words, after the launch vehicle has sent multiple satellites to a predetermined orbit, they will be released in sequence.
　　 However, there is a problem, that is, the orbit of the rocket released or dropped the satellite is a curve ascending. But if you look down from the top or from the bottom, this curve will become a straight line. In other words, they are still on the same track, but at different heights.
　　 In this way, it seems to solve the problem of multiple satellites being crowded on the same orbit.
　　 But this is only temporary. Except for geostationary orbit satellites on the equator, all other satellites will gradually lower their altitude due to fuel consumption during operation.
　　The performance differences between satellites are also different, and the decay time and speed of these satellites are also different, so there is a big risk.
　　The descending satellites may affect the safety of the earth-orbiting satellites, causing collisions and even a series of chain reactions.
　　 For example, in the hot Starlink project in recent years, Musk used a Falcon rocket to launch sixty satellites into the sky at once.
　　 But these sixty satellites are composed of a pearl chain, which also means that they are all in one orbit. So on a clear night, we will often see a string of satellites crossing the sky.
　　 What Wu Hao and the others want is not this long string of pearls, but the ability to send more than ten satellites to different orbits.
　　 is truly like a space bus, sending these satellites to their intended destination.
　　 So this technology is still relatively difficult, and its difficulty is no less than that of a spacecraft. To achieve precise control of the upper level, only in this way can the various satellites be sent to their different accurate orbits.
　　 At present, in the field of satellite technology, countries and companies no longer simply pursue weight and volume, but are increasingly focusing on some tiny satellites.
　　 Compared with ordinary large and medium-sized satellites, micro-satellites have unique advantages. First of all, its biggest advantage is the cost. The cost of a small satellite is very low, and it may even be the cost of a smart phone.
　　 For example, many university student research teams have developed many mobile satellites. In fact, the theme of the mobile phone satellite is the mobile phone, relying on the mature electronic components and equipment on the mobile phone to make a certain transformation, thus making a satellite. The manufacturing cost of this kind of satellite itself is very low, and its most expensive part is launching.
　　 If you follow the traditional one-to-one single launch method, such a mobile phone satellite will have to bear the cost of launching the entire rocket, which is very expensive.
　　 Even if the one-shot multiple-satellite technology is used to send several such tiny satellites into the sky, the evenly distributed price is very high.
　　 So how to reduce costs has become a question that scientists and technical experts have been thinking about and researching.
　　Secondly, this kind of micro-satellite is easy to manufacture, easy to transport and launch, easy to deploy, and it is also conducive to launching and deploying a large number of small satellites at one time, so as to fight the enemy's range line weapons.
　　 It is precisely because of these advantages that the development of small satellites and micro satellites is very rapid.
　　 In recent years, as the country has increased its opening up in the aerospace field, more and more scientific research institutions and companies are also developing their own small satellites and micro satellites.
　　Wu Hao, they also saw the broad development prospects of this market, so they started this project. It is the hope that with the upper level, it can launch and transport many satellites at once and transport them to different orbits.
　　 This way down, UU reading www.uukanshu. com coupled with the Kehui launch vehicle, then the launch cost evenly spread to each small satellite and microsatellite is greatly reduced.
　　 This will not only allow these R&D teams to take over, but also drive the development of this industry. It is also a good thing for Wu Hao and the others. This move will not only be able to compete for this part of the order to open up the market, but also will greatly promote Wu Hao and others in the field of aerospace technology, especially spacecraft technology, orbit change technology, and deep space exploration. .
　　 So Wu Hao is very concerned about this project, so I started to ask about it.
　　 Hearing Wu Hao’s greetings, Yu Chengwu smiled and nodded:
The project is progressing smoothly. We initially plan to divide the entire project into a three-step strategy.
　　 The first step is to develop and manufacture five to ten upper stage spacecraft, which can meet the current launch requirements of the two types of rockets, and can send five to ten small satellites to their respective predetermined orbits at one time.
　　 The second step is between ten and thirty, which means that we can put up to thirty small satellites or tiny satellites on different orbits.
　　 This has almost reached the maximum transport load of our Jianmu-2, so this upper stage will also be our main launch force for a long time to come.
　　 And in the third step, we plan to increase the scale to about 30 to 100 large upper stages, so that about 100 small or micro satellites can be sent to different orbits.
　　……"
Please remember the domain name of this book's first publication:. Mobile version reading URL: