General Secretary Xi Jinping came to the Beijing Aerospace Flight Control Center on the morning of June 23, 2021, and will talk to the Shenzhou 12 astronauts Nie Haisheng, Liu Boming, and Tang Hongbo at around 9:30.

World call! How to achieve it? Let’s talk…
How to realize the world call? About 40,000 kilometers away from the ground, the space-based measurement and control system composed of 3 skylink relay satellites is like a “space base station”, real-time guaranteeing the unimpeded communication between the world and the earth. In this era when everyone is inseparable from the Internet, whether astronauts can use Wi-Fi in space has become a topic of public concern. During the three months of staying on the space station, astronauts can not only communicate with the ground through voice and video, send and receive e-mails, but also watch TV programs and make private conversations with their families through the communication network within the station. The family members of the astronauts can make private point-to-point conversations with the astronauts on the ground through a dedicated phone, and the ground staff cannot hear them. How is the cross-temporal communication implemented? The completion of this world-to-earth call requires the participation of the space station, the skylink relay satellite and the ground station. In the space station Tianhe core cabin, more than 10 wired and wireless network cameras, wired and Bluetooth headsets, mobile phones, PADs, and laptops can all be used as network terminals. These terminals connect the collected image and voice data to the in-cabin Ethernet switch through wired or wireless Wi-Fi, and transmit it to the ground via a relay link through a high-speed communication processor. Just like on the ground, we use mobile phone antennas to make calls and send text messages. The communication between the space station and the ground is mostly done by the relay antenna on the core module. With the relay antenna, it is like handing over the “mobile phone” to the space station, and can get in touch with the ground in real time. Not only that, in order to meet the 15-year service life of the space station orbit, the developers also designed the relay antenna of the Tianhe core module to be repairable. This is a breakthrough compared to the previous launch model’s design that cannot be repaired in orbit. There are two sets of networks on the cabin, one is the communication network and the other is the load network. The two sets of networks are physically together and logically separated. The data is unified to the relay antenna terminal on the cabin and passes through the Following the satellite transmission to the ground. “Tianlian” builds a space-based road without stuttering and continuous network at an altitude of 40,000 kilometers. The space-based measurement and control network composed of Tianlian-1, 03, 04, and Tianlian-2 01 is like a “space base station”. Connect the core module and the ground station to establish a “sky road” in space. Voice, video, e-mail data between the space station and the ground, as well as downlink scientific experiment data, all go through this “sky road”. Will there be congestion on such a busy “Tian Road”? Will not! The downlink rate of this communication link is 1.2G, which is equivalent to the terrestrial 5G communication rate. The relay satellite ground station receives space data in real time, then transmits the data to the Beijing Flight Control Center, and then automatically distributes it according to different identifiers, with a delay of only seconds. Before the Tianlian relay satellite was put into use, my country mainly used ground-based measurement and control stations to track and monitor mid-to-low orbit spacecraft. However, medium and low orbit spacecraft are in orbits of 200 to 2,000 kilometers, and there is only a very small period of time to establish a stable data transmission link with a fixed ground measurement and control station, and signal interruption is common. The space station flies in orbit and circumnavigates the earth every 90 minutes. Is it possible that there will be interruptions in the communication between the world and the earth? impossible. After the stable flight in space, the coverage rate of space and earth measurement and control can reach more than 90% through the 3 relay satellites and the relay antenna of the core module. After the three cabins of the space station form a combination, the relay antennas of the other two cabins are offset, and the measurement and control coverage can be close to 100%.

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helpmekim
6 months ago

On the morning of June 23rd, General Secretary Xi Jinping came to the Beijing Aerospace Flight Control Center and talked with the Shenzhou 12 astronauts Nie Haisheng, Liu Boming, and Tang Hongbo Tiandi. <img src=”https://pic2.zhimg.com/50/v2-dcd7bbf4356d82966d7637aa1b1fb0d8_hd.jpg?source=1940ef5c” data-caption=”” data-size=”normal” data-rawwidth=”720″ data-rawheight =”405″ data-default-watermark-src=”https://pic1.zhimg.com/50/v2-34c1b3b14f806c0a1734c6d5068336e8_hd.jpg?source=1940ef5c” class=”origin_image zh-lightbox-thumb” width=”720″ data-original=”https://pic2.zhimg.com/v2-dcd7bbf4356d82966d7637aa1b1fb0d8_r.jpg?source=1940ef5c”/>In the live TV screen, the “Skylink” logo in the upper right corner is particularly eye-catching. Thanks to the Samsung network of relay satellites, astronauts can communicate with the ground for a longer period of time. The relay satellite system tracks the Tianhe core module and Shenzhou 12 combination through relay to establish the combination and the ground. The two-way long-term communication link between the astronauts and the ground provides reliable space-based measurement and control communication support between the astronauts and the ground; the relay satellite system has participated in all manned space missions from Shenzhou 7 to Shenzhou 12, And take advantage of its high orbit coverage and high-speed and large-capacity data transmission to provide safe and reliable space-based measurement and control and data relay services for the mission. The relay satellite leads the boat in the space of Wanli, which is to establish an information highway between the astronauts and the ground. The stability and reliability of this road is very important to guarantee the quality of the communication between the sky and the earth, and it is also important for the daily contact between the astronauts and the ground. Guaranteed. The video call between Chairman Xi and the astronauts ended. The voice was smooth and the picture was clear during the whole process. “Tianlian Ren” once again successfully guaranteed the task of data relay transmission of the call between the world and the earth, and passed the chairman’s care to the nine days and everyone’s heart. , Injecting new spiritual strength into the task to complete success.

heloword
6 months ago

On June 15th, Huang Weifen, the chief designer of the astronaut system of China’s manned space project, known as the “female astronaut”, said in an interview with a reporter from the Global Times that in the space station era, Chinese astronauts will be in the space station. “Residence” lasts for 3-6 months. In addition to daily scientific research, astronauts can listen to music, play games, watch videos, watch live TV in real time, and make calls on the ground at any time in their free time. “You can watch the news broadcast, and it’s live broadcast; you can also talk to family, friends, and colleagues on the phone, and send text messages, pictures, videos, etc. to the ground through the local area network,” Huang Weifen said. Earlier, Bolin Hou, deputy chief designer of the China Space Station Tianhe Core Module, also said in an interview with a Global Times reporter that the application of the latest technology, such as information technology, to the China Space Station is a comparison between the China Space Station and other space stations in orbit. unique advantage. Berlin Hou said that in the space station era, Chinese astronauts have greatly improved the comfort of working and living in the cabin. Some “grounded gas” civilian technologies, such as smart home technology, have been applied on the Chinese space station. For example, install an APP on the astronaut’s mobile phone, and use the APP to remotely control the microwave oven in the “kitchen” and the scene lighting in the cabin; in order to improve portability, some wireless access technologies are also applied, such as space-to-earth calls and astronaut calls. The use of Bluetooth technology, WiFi technology, these technologies are very common in the civilian field, but in orbit in space, all need to undergo some transformation. The astronauts are busy “unpacking” in the sky. I want the astronauts to start eating and broadcasting. The food on the Chinese space station is definitely “a must in space”, which makes people salivate. I want to say to the astronauts: “What are you eating today?”

helpyme
6 months ago

Many viewers who watched the real-time live broadcast were pleasantly surprised to find that in this world call, not only the sound and picture were not stuttered, but the picture and sound transmitted back from the multi-camera on the China Space Station in real time were clearer than before. On the screen of the command hall of the Beijing Aerospace Flight Control Center, the three relay satellites of Tianlian-2 01, Tianlian-1 03, and 04 are marked, as well as measurement and control stations and stations in many places around the world such as Weinan, Xiamen, and Namibia. The Yuanwang-6 survey ship is silently providing protection for this historic moment. The new generation of “Skylink” participated in the manned space mission for the first time. “Thanks to the Samsung network of relay satellites, astronauts can communicate with the ground for a longer period of time.” Zheng Yonghui, general engineer of Beijing Space Information Transmission Center, told the Global Times Reporter, in 2003, when China’s first astronaut Yang Liwei entered space, he made several calls between the world and the earth, but each time had a very strict time window. It is understood that in the early stage of China’s manned space project, China mainly used land-sea-based measurement and control of the world-earth communication link. Since China does not have measurement and control stations and measurement ships all over the world, spacecraft with an orbit height of 300 to 400 kilometers are affected by the curvature of the earth. The occlusion and the field of sight are affected. Only when entering the field of view of the Chinese measurement and control station (ship) can a short-term space-to-earth communication link be established within the flight arc. Said almost ignorant. In order to change this situation, China’s “Tianlian No. 1” relay satellite system project was formally established. From 2008 to 2019, there have been two generations of five “Tianlian” satellites successfully entering space, and they continue to play a high role. The advantages of orbital coverage and high-speed and large-capacity data transmission provide safe and reliable space-based measurement and control and data relay services for manned space missions. The time that astronauts can talk to the ground has been greatly increased. In 2013, the relay satellite system of the Samsung network was realized, which guarantees for the first time the world-to-earth communication between the ground and the astronauts, with clear picture quality and smooth voice… Greetings and expectations from the ground were transmitted to the sky in the first time. “This time, my country’s self-developed second-generation relay satellite’Tianlian-2′ 01 star participated in the manned space mission for the first time. With its existence, the audio and video transmission rate between the sky and the earth has been higher, and the effect of the communication between the sky and the earth The length of the talk time has been improved,” Zheng Yonghui said. The space and earth bandwidth rate of the China Space Station is better than that of the International Space Station. According to the Global Times reporter, the Tianlian-2 01 satellite, which participated in the manned space mission for the first time, is my country’s second-generation relay satellite. It has a wider coverage panoramic beam and a higher speed. Features such as faster transmission speed and stronger multi-target support capabilities. After the first-generation relay network with Tianlian and the formation of a world-to-earth link, this “Skylink” system has previously become the main measurement and control communication system for the autonomous rapid rendezvous and docking of the Shenzhou 12 manned spacecraft and the core cabin. In this “space-to-earth call”, the “space base station” composed of Tianlian-1 03, 04, and Tianlian-2 01, located at an orbital altitude of 40,000 kilometers, is between the core module of the Chinese space station and the ground station. Establish a network link. Voice, video, e-mail data between the space station and the ground, as well as downlink scientific experiment data can be transmitted at high speed through this link. Yi Yusheng, chief designer of the space station system measurement, control and communication sub-system of the Fifth Academy of Aerospace Science and Technology Group, said in an interview with the media that there are more than 10 wired and wireless network cameras, mobile phones, PADs, and laptops on the space station’s core capsule. Mobile devices such as computers can be used as network terminals. These terminals connect the collected image and voice data to the in-cabin Ethernet switch through wired or wireless Wi-Fi, and then transmit it to the ground via a relay link through a high-speed communication processor. The downlink rate of this relay communication link is 1.2G, which is equivalent to the 5G communication rate on the ground. The relay satellite ground station receives space data in real time, then transmits the data to the Beijing Flight Control Center, and then automatically distributes it according to different identifiers, with a delay of only seconds. In addition, after the stable flight of the Chinese space station, the coverage rate of space and earth measurement and control can reach more than 90% through the three relay satellites and the relay antenna of the core module. After the three cabins of the space station form a combination, through the partial installation of the relay antennas of the other two experimental cabins, the measurement and control coverage can be close to 100%. The Chinese space station will no longer have any interruption in the communication between the sky and the earth when it orbits the earth in one and a half hours. Yi Yusheng added. Earlier, Bolin Hou, deputy chief designer of the Tianhe Core Module of the China Space Station, said in an interview with a reporter from the Global Times. The application of the latest information technology to the China Space Station is a unique advantage of the China Space Station compared to other space stations in orbit. According to Berlin Hou, the information technology currently used on the China Space Station has a bandwidth rate higher than that of the International Space Station. The concept of the Tiandi high-speed network has now been applied to the Chinese Space Station. ——Reproduced from the Global Times

sina156
6 months ago

It’s another day of catching fish and watching the live broadcast. From the program introduction point of view, the space-to-earth call is a video call between the space and the ground through the Skylink satellite and the ground station. On the space station side, the astronauts use bone conduction headsets to connect with mobile phones (like ordinary mobile phones used by the astronauts), and then use the local area network to access the space station, and then use the above-mentioned heaven-earth communication network to transmit data. In addition, the program introduced that the space station uses a standard network protocol, which is a good thing. I look forward to regular live broadcasts, selective broadcasts in the cabin, and continuous broadcasts outside the cabin. Hope our astronauts have a happy life and work in space! You are our family in space, and with you there, we really have “someone above”! The other thing to say is that today’s show is really cool for me! A huge amount of space station work and life pictures, great satisfaction! Unpacking the parcels all over the sky, gnawing apples, shaving, twisting the screws, flying around, eating lunch, I look so refreshed! I even forgot to take a screenshot. Go and watch the replay by yourself! ! Hahahaha.

yahoo898
6 months ago

The realization of the world-to-earth call has the following requirements: 1. Hardware facilities, space station, Tianlian relay satellite system (Tianlian No. 1 03, 04, Tianlian No. 2 01), ground station 2. Brief description of the process of ground call , First from the ground station to the sky-link relay satellite through the satellite-to-earth uplink, the relay satellite receives the call information from the ground station, and then transmits it to the relay antenna of the space station through its own inter-satellite link antenna, so that the astronauts Just listen to us! 3. Technology upgrades The main reason why we can receive astronaut signals in real time is the use of Skylink relay satellites. Previously, we mainly used ground-based measurement and control stations to track, monitor, and communicate with low- and mid-orbit spacecraft. However, the space station can move. It is affected by the curvature of the earth every 90 minutes. Signal interruption is common. When the space station turns to the back of the earth and is out of the scope of measurement and control, it will not be able to contact the present. We have a transit station called Skylink Relay Satellite, which can accurately track the space station and transmit signals, so that we no longer have to worry about losing connection! As for what the astronauts are saying, I heard that you can see the sunrise and sunset 16 times a day in the space station. Please take two more pictures for us mortals when you have time.

leexin
6 months ago

The “communication and information transmission” between the space station and the ground mainly relies on the ground measurement and control station, the data transmission receiving station and the relay satellite system. In our country, there is mainly the “Skylink Relay Satellite System” to ensure uninterrupted communication between the space station and the ground. Relay satellites are called “satellites”, which relay signals from medium and low orbit satellites and spacecraft. Relay satellite systems generally also use geosynchronous relay satellites, so that an all-weather, real-time “high-speed communication link” can be established between the aircraft and the ground station. It can provide data relay and measurement and control services for manned spacecraft such as spacecraft, space technology laboratories, and space stations. It can also serve satellites such as medium and low orbit remote sensing, surveying and mapping, and meteorology. It can also provide measurement and control support for spacecraft launches. Our country’s “Tianlian Relay Satellite System” was built in 2008, and now it has developed to the second generation (Tianlian-2). From 2008 to 2012, my country successively launched Tianlian-1 satellites 01 to 03, and three satellites were networked and operated, making my country the world’s second relay satellite system capable of global coverage of medium and low-orbit spacecraft. country. In 2016, the 04 satellite of Tianlian-1 successfully entered orbit and completed the in-orbit test, and realized global network operation with 01 to 03 satellites, providing data relay and measurement and control services for my country’s Shenzhou spacecraft, space laboratory and space station, and supporting space rendezvous Docking and other tasks. In March 2019, Tianlian-2 01 was successfully launched, which is the first satellite of my country’s second-generation geosynchronous orbit data relay satellite. It is compatible with the Tianlian-1 satellite system, which enables my country’s space-based communication infrastructure characterized by data relay to be further improved in terms of transmission rate, number of services, and coverage. In addition, with a more complete relay satellite system, Chinese astronauts can “live” in the space station for 3-6 months. In addition to daily scientific research, astronauts can listen to in their leisure time. Music, play games, watch videos, watch live TV in real time, and “call” family members, friends, and colleagues on the ground at any time. I wish our astronauts on the space station, work, life and entertainment, maintain a good mental transformation, and complete the construction of the space station.

greatword
6 months ago

Mainly by radio. The completion of this world-to-earth call requires the participation of the space station, the skylink relay satellite, and the ground station. In order to ensure the high-reliability and high-level smooth implementation of the world-to-earth communication task, the Fifth Academy of Aerospace Science and Technology Group has adopted a series of high-tech for the space station measurement and control and communication, data management, instrumentation and other sub-systems, from communication technology, high-speed data management, Improve the quality of call tasks in multiple dimensions such as ergonomics.

loveyou
6 months ago

According to Yi Yusheng, the chief designer of the space station system measurement, control and communication sub-system of the Fifth Academy of Aerospace Science and Technology Group, the completion of this space-to-earth call requires the participation of the space station, the Tianlian relay satellite and the ground station. It is understood that, in order to ensure the high reliability and high level of the smooth implementation of the world-to-earth communication task, the Fifth Academy of Aerospace Science and Technology Group has adopted a series of high-tech for the space station measurement and control and communication, data management, instrumentation and other sub-systems, from communication technology to high-speed data management. , Ergonomics and other multi-dimensional improvement of the quality of the call task. At the beginning of the design and construction of the space station, researchers put the astronauts’ life experience in orbit first, making the astronaut’s life more convenient and the work more effective. In order to facilitate the free movement of astronauts in the cabin, the designers of the measurement, control and communication sub-system of the General Design Department of the Fifth Academy used advanced WiFi communication technology to replace the traditional wired headset communication, and deployed at multiple points in the cabin. Ensure that the signal coverage has no dead ends. According to Yi Yusheng, when astronauts talk to each other in the cabin or talk to the ground, they can move freely by wearing WiFi devices on their heads, and are no longer restricted by cables, which greatly improves the work efficiency of astronauts. In the space station Tianhe core cabin, more than 10 wired and wireless network cameras, wired and Bluetooth headsets, mobile phones, and laptops can all be used as network terminals. These terminals connect the collected images and voice data to the in-cabin Ethernet switch through wired or wireless Wi-Fi, and transmit them to the ground via a relay link through a high-speed communication processor. In this mission, to ensure that the astronauts stay for a long time, and to ensure the 15-year service life of the relay terminal in orbit. Researchers have designed a repairable relay terminal. This is a breakthrough compared to the previous repairs that could not be repaired in orbit. In addition, the communication measurement and control data transmission of the relay terminal is faster, and the rate at which the core cabin of the space station is sent to the ground is equivalent to the 5G communication rate. In addition, the core module of the space station is equipped with multiple high-definition cameras, which not only allows the ground monitoring space station to take pictures of the beautiful scenery of the earth, but also helps astronauts realize two-way high-definition video calls and receive video with the ground through the large instrument screen. In terms of space-to-earth communication experience, the biggest difference between the space station and the previous space laboratory is the addition of the space-to-earth Internet communication system. The communication rate between the space station and the space laboratory is eight times that of the space laboratory. The combination of the world internet and high-speed communication allows astronauts to enjoy all the conveniences brought about by modern Internet life in the sky. The on-orbit communication network switching network and the world gateway system composed of space Ethernet switches integrate the Internet between the world and the earth. The astronauts use the handheld cameras and tablet computers they carry with them to connect to the network through WiFi hotspots, and they can be like at home Feel the same fun of surfing the Internet, watching videos, sending and receiving emails, providing a better experience for the communication between the astronauts and the ground. At an altitude of 40,000 kilometers, the space-based measurement and control network composed of Tianlian-1, 03, 04, and Tianlian-2 01 is like a “space base station” that connects the core module and the ground station to create a space.” sky Road”. The voice, video, and email data between the space station and the ground, as well as the downlink scientific experiment data, all follow this “road to heaven.” “Thanks to the Samsung network of relay satellites, astronauts can communicate with the ground for a longer period of time.” Zheng Yonghui, the overall engineer of the Beijing Space Information Transmission Center, told the author that in 2003, when the space hero Yang Liwei entered space, he had counted There was a space-to-earth call with the ground every time, but each time had a very strict time window. Under this circumstance, my country’s “Tianlian No. 1” relay satellite system project was officially established. From 2008 to 2019, there have been two generations of five “Tianlian” satellites that have entered space successfully, and they continue to perform high orbits. The coverage rate and the advantages of high-speed and large-capacity data transmission provide safe and reliable space-based measurement and control and data relay services for missions. The arc of operation where astronauts can communicate with the ground is greatly increased. In 2013, the relay satellite system of the Samsung network was realized, which for the first time ensured that the general secretary and the astronauts had a world-to-earth call. The clear picture quality, smooth voice… The care and expectations of the leaders were transmitted to the sky in the first time. “This time, my country’s self-developed second-generation relay satellite’Tianlian-2′ 01 satellite participated in the manned space mission for the first time. With its existence, the audio and video transmission rate between the sky and the earth is higher, and the effect of the communication between the sky and the earth is better But the duration of the call has been improved, further realizing that “the true love between heaven and earth is only a few minutes away”.” Zheng Yonghui said. The space station flies in orbit and circumnavigates the earth every 90 minutes. Is there any interruption in the communication between the world and the earth? Yi Yusheng said “impossible.” He explained that after a stable flight in space, through the three relay satellites and the relay antennas of the core module, the coverage rate of space and earth measurement and control can reach more than 90%. After the three cabins of the space station form a combination, the relay antennas of the other two cabins are used. Partial installation, measurement and control coverage can be close to 100%. In addition, the image, voice and communication products used in the world call are developed by the Eighth Academy of Aerospace Science and Technology Group. The space station voice processor developed by the institute has achieved three firsts: for the first time, real-time maintenance and management of various communication terminals inside the spacecraft; for the first time to use digital mixing technology to achieve mutual calls between various terminals; for the first time through the betting and other methods Dynamically adjust various audio parameters. In terms of experience, the space station voice processor can not only allow astronauts to make phone calls inside and outside the station as if at home on the space station, they can “connect” with the Shenzhou spacecraft on the way, and even establish a “group chat”. Add the friends you want to chat with, and you can choose to have a one-on-one “private message” with your lover or relatives and friends on the ground. Astronauts can access and chat in any corner of the space home, and accurately set single or multiple call partners, so that they can talk to whoever they want to talk to in the cabin, outside the cabin and on the ground.

strongman
6 months ago

With the successful launch of Shenzhou 12 carrying 3 astronauts and the docking with the Chinese Space Station, the three astronauts started a three-month space life and work. Up to now, Nie Haisheng, Liu Boming, and Tang Hongbo The three astronauts have been stationed in the space station for a week. During this week, they were able to dismantle the express delivery and ate delicious space takeaways. Not only that, they also installed wifi, conducted world-to-earth calls, and could video call with their families at any time. The picture of the call feels so close to us, the power of technology. At an altitude of 400 kilometers, the Chinese space station is connected to the ground network, and the technology required behind it is also very cutting-edge. At this time, I was so excited and felt that our motherland is too strong. This is the result of our country’s technological flying. Speaking of aerospace, I would like to give you a very valuable gift that has something to do with space. YIN YIN Aerospace Cultural and Creative Co-branded Jewelry Series Limited Edition “YIN Yin, Aerospace Cultural and Creative CASE” joint limited edition rocket pendant bracelet, the material is made of Based on the rocket falling pieces of aerospace composite materials, it is made of “rocket falling pieces” that overlook the earth, and it is certificated. It is cosmic and poetic and romantic. It is composed of 18K real gold and titanium steel, which has the value of preservation and Collection meaning; the Chinese pattern of the necklace pendant, as well as a rocket embedded in 18k gold, the reverse side is a pendant piece cut from the shell of the rocket, which is the color of the rocket itself, so the color on the back of each bracelet is different , They are all unique packaging and very high-end. They can also be given as gifts to men’s tickets. A gift from space is a pleasant surprise.

stockin
6 months ago

I just went to watch the live broadcast and I was really excited. Unexpectedly, you can really make a call between heaven and earth. I really want to tell the astronauts, I don’t know why it feels so fun to float. Going to space is like practicing countless times as usual, so I can be so calm. Is there a big difference between a cabin in space and a practice cabin? Or it’s just a change of place, and everything else is the same. So keep a normal mind?

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