Heavyweight! Wuhan university students made a successful satellite launch!

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2 month 27 Japan 11 when 06 branch , The Long March 8 carrier rocket took 「 An arrow 22 star 」 The way to successfully launch .

Little imagine ,22 One of the stars was developed by the Chinese student team of Wuhan University . This star is called 「 Kai star 」.

14 when 11 Received separately 「 Kai star 」 Satellite telemetry signal , The satellite signal is stable , Work well .

In Wuhan University Yuhang science and Technology Research Institute 「 Kai star 」 Launch and TT & C second site , The teachers and students participating in the research and development share the joy .

「 Student made 」 satellite

same day , Wuhan University also announced this exciting event . The satellite lifted off with the Long March 8 , It really enlightened the students' Aerospace dream .

after 2 year ,50 Many undergraduate, master and doctoral students participated in the design 、 R & D and testing , Among them, undergraduates have 20 A number of .

Where did the idea of developing satellites come from ？

2019 year 9 month , At the first thesis defense meeting of Wuhan University , Some students put forward many new ideas , But the big five get the data they want to verify .

at that time , Professor Jin Guang and Professor Wu zhaocong of the school of Remote Sensing Information Engineering of Wuhan University discussed ,「 In the past, the remote sensing discipline of Wuhan University relied on foreign data , Why not develop your own satellite , Get remote sensing data according to your own needs ？」

Since then , The enlightenment star is born from the research and application .

「 Kai star 」 Is a 40×30×40 Centimeter microsatellite , The weight is only 19.2 kg .

It is China's first visible hyperspectral and noctilucent multispectral multimode in orbit programmable satellite , Can do 24 Hours without sleep 、 Master all kinds of remote sensing means .

during the day time ,「 Kai star 」 Can get 32 Hyperspectral remote sensing in three bands .

such as , Hyperspectral images of earth surface features , Be able to analyze the main pollutants in water , Provide early warning for water environment monitoring .

at night , It can get 8 Multispectral remote sensing of multiple bands （ Color image lighting at night 、 Neon lights are visible ） And infrared remote sensing .

such as , Luminous image of the earth's surface , More accurate analysis of the relationship between lighting and economy , Study the health effects of light pollution .

One of the best things about a little star is ：8 Band night light remote sensing .

Up to now , Noctilucent remote sensing by foreign satellites is rare , Generally, there is only one band , The resolution is only 500—1000 rice .「 Kai star 」 The noctilucent remote sensing on the has reached 8 Band , A resolution of 21 rice , Compared with similar satellites abroad, it is nearly 40 times .

Day 、 Visible spectrum remote sensing at night can reach 107 The width of kilometers 、21 Meter resolution , Infrared remote sensing can achieve 100 Kilometer width 、100 Meter resolution .

After the operation of this satellite, the remote sensing satellite ground station of Wuhan University in Jiangxia will be responsible for ground measurement and control and data reception .

future , The star 「 Kai star 」 It can predict the global urban light pollution . Need to know , Light pollution and cancer 、 Parkinson's disease and other diseases , It has become a pollution source that has attracted much attention .

If you have these spectral data , We can combine the incidence rate in different regions with spectral color data , You may find some correlation .

Little 「 Kai star 」, Can play a big role .

22 star 「 Carpooling 」 success

A rocket can carry several satellites into space ？

China has given its own answer ：22 individual .

Prior to 2015 year , China's Long March 6 new carrier rocket was launched at Taiyuan Satellite Launch Center . That time , China's success will 20 A tiny satellite is sent into space at one time .

This not only broke the number of single launches in China at that time , And broke the Asian record —— India is in 2008 Year of 「 An arrow 10 star 」.

And today ,2022 year 2 month 7 Japan , China's domestic record of multiple stars with one arrow has been broken once again .

This time, , China uses Long March 8 carrier rocket at Wenchang space launch site , Successfully put Taijing No. 3 01 satellite 、 Taijing 4 01 satellite 、 Hainan No.1 01/02 star 、 Wenchang 1 01/02 star 、 Jilin No.1 high score 03D10-18 star （ common 9 star ）、 Jilin no. 1 MF02A01 star 、 Chaohu 1 satellite 、 The genesis Raytheon satellite 、 Apocalypse 19 star 、 Star age -17 satellite 、 The Venus 1 satellite 、 XD-1 satellite consists of 22 A satellite was launched .

It is not easy to launch so many satellites at one time .22 How the satellites are arranged in the fairing , It is the first problem that researchers need to solve .

After carefully sorting out the structure of the satellite 、 After the task requirements , After much deliberation 、 Dare to imagine , Finally, a three-layer multi star distributor is designed . So that we can 22 Satellites are optimized in the limited space of the fairing . And it can ensure absolute safety when it is separated in all directions .

And separation is the second hurdle this rocket will pass .22 The separation of satellites needs to be completed successfully 12 Separation action , This also broke China's aerospace record .

Final ,22 The satellites were successfully separated from each other , Like a blooming flower in space .

Duan Baocheng, deputy commander in chief of the Long March 8 launch vehicle, said ,「 In the separation of stars and arrows, the long eight rocket seemed to jump out ‘ Ballet ’, Final 22 The release of the stars is just like the scattered flowers of heaven and women .」

in addition , After the design of the above multi satellite distributor is completed by the development team , We also carried out experiments on the joint operation of satellites and arrows , Sequence of satellite installation operations 、 The layout position is constantly adjusted and optimized , Ensure final ignition 、 Separation is safe .

The of this launch 22 Rockets involved 7 Households and units （ Of course, including those developed by teachers and students of Wuhan University 「 Kai star 」）, The coordination work is heavy . however , This new shared launch mode is an improvement .

Xiao Yun, commander in chief of the Long March 8 carrier rocket, pointed out that ,「 Simply put, it's a carpool scheme , Provide users with affordable launch services , The threshold has been greatly lowered .」

Last , I have to mention the origin of the Long March 8 carrier rocket . Its presence 2020 year 12 Made its debut in , It is a new generation of main medium-sized launch vehicle in China , To undertake 80% The above low and medium orbit launch mission .

And this launch adopts a new configuration , First attempt to launch without two boosters , From two-stage semi configuration to two-stage series configuration .

Reference material ：

https://www.guancha.cn/politics/2022_02_27_627915.shtml

https://mp.weixin.qq.com/s/1fERK4vfmdZvVYsUuxlE-w

http://news.cnhubei.com/content/2022-02/28/content_14535089.html

https://www.cnbeta.com/articles/tech/1241179.htm

https://www.sohu.com/a/525868383_121107000

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