China Space Military：Recon, Satcom, Navi, ASAT/BMD, Orbital Vehicle, SLV, etc.
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China launches heaviest satellite to test key technologies
Source: Xinhua| 2019-12-27 22:14:33|Editor: Mu Xuequan
Long March-5 Y3 blasts off from Wenchang Space Launch Center in south China's Hainan Province, Dec. 27, 2019. The rocket, coded as Long March-5 Y3, blasted off from the coastal launch center at 8:45 p.m. (Beijing time), carrying the Shijian-20 technological experiment satellite weighing over eight tonnes, the heaviest and most advanced communications satellite of the country. About 2,220 seconds later, the satellite was sent into its planned orbit. (Xinhua/Yang Guanyu)
by Xinhua writers Quan Xiaoshu, Yu Fei
WENCHANG, Hainan, Dec. 27 (Xinhua) -- Aboard the third Long March-5 rocket, China's largest carrier rocket, Shijian-20, a new technology test and verification satellite, successfully entered its orbit Friday night.
The rocket, coded as Long March-5 Y3, blasted off from the Wenchang Space Launch Center in south China's Hainan Province at 8:45 p.m. (Beijing time).
Shijian-20, weighing more than eight tonnes, is the country's heaviest and most advanced communications satellite in geosynchronous orbit, according to its maker, the China Academy of Space Technology (CAST) under the China Aerospace Science and Technology Corporation (CASC).
It will carry out orbit experiments for a series of key technologies, the CAST said in a press release.
It will demonstrate in orbit its heat transfer technology based on cryogenic loop heat pipes, an efficient thermal control device for space applications, to lay the foundation for the development of highly sensitive space probes.
The satellite will test the controllable deformation of shape memory polymers, a type of smart material that can switch between temporary shapes, to pave the way for the development of large variable space structures.
It will also carry out satellite-ground communication tests using Q/V bands, which lie between 33-75 GHz, within the extremely high frequency (EHF) area of the radio spectrum. These frequencies are used mainly for satellite communications.
"The major way to improve the satellite communication capacity is to expand the bandwidth of available frequency bands. If we liken the geostationary orbit to an expressway, which is now the most crowded in space, the use of Q/V bands will help to widen the expressway by four to five times," said Li Feng, chief designer of the satellite with the CAST.
The test is key to the development of the next generation of high throughput satellites capable of delivering 1Tbps bandwidth for ultrafast speeds, he said.
Shijian-20 has the largest solar wings among all China's satellites, with the total wingspan 10 meters wider than that of a Boeing 737 aircraft.
The solar wings will unfold twice, the first time after the satellite enters its orbit and the second after it flies around the orbit for about a week. The increase of the solar wing area will supply the satellite with abundant power.
The satellite adopts a hybrid propulsion system. Chemical propulsion is powerful but inefficient, and is used in rapid orbit change or satellite attitude adjustment to send it to the planned orbit as soon as possible. Electric propulsion is more precise and efficient but less powerful, which is suitable for long-term delicate adjustments in orbit.
Electric propulsion is also a preferred technology for future deep space exploration. Missions to explore Mars, Jupiter and asteroids are all too far away from Earth to be fulfilled by chemical propulsion alone, as it is impossible to bring the amount of fuel needed.
Shijian-20 will also test the adaptability of the DFH-5 satellite platform, which may serve the needs of high-capacity satellites for high orbit communications, microwave remote sensing, optical remote sensing, space scientific exploration, in-orbit service and other purposes in the next 20 years.
"With the government's consistent support for the communications satellite industry in the past decades, we have developed the DFH-3 and DFH-4 satellite platforms, making China one of the few countries in the world that can independently develop large communications satellites and provide in-orbit commercial services," said Hao Yanyan, product assurance manager of Shijian-20 with the CAST.
So far, there are more than 20 communications satellites based on the DFH-4 platforms running stably in orbit.
To meet the pressing needs of economic development, the research and development of the DFH-5 platform started in 2010.
According to the design, the takeoff weight of a satellite based on the DFH-5 platform can reach eight to nine tonnes, and its payload capacity 1,500 to 1,800 kg. The power for the whole satellite is more than 28 kilowatts, while the power for its payload above 18 kilowatts.
"According to these technical indicators, a satellite based on the DFH-5 platform in orbit can provide services equivalent to that of two or three satellites on the DFH-4 platform," Hao said.
The new technologies verified by Shijian-20 will further promote the development of new satellites, especially the high throughput communications satellite and high resolution remote sensing satellite, which is of great significance to the progress of China's space technology, Li said.
LIPS-300 ion engine
Source: Xinhua| 2019-12-27 22:14:33|Editor: Mu Xuequan
by Xinhua writers Quan Xiaoshu, Yu Fei
WENCHANG, Hainan, Dec. 27 (Xinhua) -- Aboard the third Long March-5 rocket, China's largest carrier rocket, Shijian-20, a new technology test and verification satellite, successfully entered its orbit Friday night.
The rocket, coded as Long March-5 Y3, blasted off from the Wenchang Space Launch Center in south China's Hainan Province at 8:45 p.m. (Beijing time).
Shijian-20, weighing more than eight tonnes, is the country's heaviest and most advanced communications satellite in geosynchronous orbit, according to its maker, the China Academy of Space Technology (CAST) under the China Aerospace Science and Technology Corporation (CASC).
It will carry out orbit experiments for a series of key technologies, the CAST said in a press release.
It will demonstrate in orbit its heat transfer technology based on cryogenic loop heat pipes, an efficient thermal control device for space applications, to lay the foundation for the development of highly sensitive space probes.
The satellite will test the controllable deformation of shape memory polymers, a type of smart material that can switch between temporary shapes, to pave the way for the development of large variable space structures.
It will also carry out satellite-ground communication tests using Q/V bands, which lie between 33-75 GHz, within the extremely high frequency (EHF) area of the radio spectrum. These frequencies are used mainly for satellite communications.
"The major way to improve the satellite communication capacity is to expand the bandwidth of available frequency bands. If we liken the geostationary orbit to an expressway, which is now the most crowded in space, the use of Q/V bands will help to widen the expressway by four to five times," said Li Feng, chief designer of the satellite with the CAST.
The test is key to the development of the next generation of high throughput satellites capable of delivering 1Tbps bandwidth for ultrafast speeds, he said.
Shijian-20 has the largest solar wings among all China's satellites, with the total wingspan 10 meters wider than that of a Boeing 737 aircraft.
The solar wings will unfold twice, the first time after the satellite enters its orbit and the second after it flies around the orbit for about a week. The increase of the solar wing area will supply the satellite with abundant power.
The satellite adopts a hybrid propulsion system. Chemical propulsion is powerful but inefficient, and is used in rapid orbit change or satellite attitude adjustment to send it to the planned orbit as soon as possible. Electric propulsion is more precise and efficient but less powerful, which is suitable for long-term delicate adjustments in orbit.
Electric propulsion is also a preferred technology for future deep space exploration. Missions to explore Mars, Jupiter and asteroids are all too far away from Earth to be fulfilled by chemical propulsion alone, as it is impossible to bring the amount of fuel needed.
Shijian-20 will also test the adaptability of the DFH-5 satellite platform, which may serve the needs of high-capacity satellites for high orbit communications, microwave remote sensing, optical remote sensing, space scientific exploration, in-orbit service and other purposes in the next 20 years.
"With the government's consistent support for the communications satellite industry in the past decades, we have developed the DFH-3 and DFH-4 satellite platforms, making China one of the few countries in the world that can independently develop large communications satellites and provide in-orbit commercial services," said Hao Yanyan, product assurance manager of Shijian-20 with the CAST.
So far, there are more than 20 communications satellites based on the DFH-4 platforms running stably in orbit.
To meet the pressing needs of economic development, the research and development of the DFH-5 platform started in 2010.
According to the design, the takeoff weight of a satellite based on the DFH-5 platform can reach eight to nine tonnes, and its payload capacity 1,500 to 1,800 kg. The power for the whole satellite is more than 28 kilowatts, while the power for its payload above 18 kilowatts.
"According to these technical indicators, a satellite based on the DFH-5 platform in orbit can provide services equivalent to that of two or three satellites on the DFH-4 platform," Hao said.
The new technologies verified by Shijian-20 will further promote the development of new satellites, especially the high throughput communications satellite and high resolution remote sensing satellite, which is of great significance to the progress of China's space technology, Li said.
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JSCh
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New China-Brazil earth resource satellite sent into space
Source: Xinhua| 2019-12-20 12:05:07|Editor: Yurou
TAIYUAN, Dec. 20 (Xinhua) -- A new satellite, jointly developed by China and Brazil, was sent into space on Friday, pushing forward the aerospace cooperation between the two countries, according to the China National Space Administration.
The China-Brazil Earth Resource Satellite-4A was launched on a Long March-4B carrier rocket at 11:22 a.m. Friday Beijing Time from the Taiyuan Satellite Launch Center in north China's Shanxi Province.
The satellite is the sixth satellite under the earth resource satellite cooperation program between the two countries. It will obtain global optical remote-sensing data and support the Brazilian government's monitoring of the Amazon rainforest and the country's environmental changes.
The satellite was jointly developed by the China Academy of Space Technology and the National Institute for Space Research of Brazil. The carrier rocket was developed by the Shanghai Academy of Spaceflight Technology.
By the same rocket, another eight satellites were put into orbit, including a wide-range multispectral remote-sensing microsatellite donated to Ethiopia.
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CHINA'S SPACE LAUNCHES IN 2020
China's main space contractor —China Aerospace Science and Technology Corporation (CASC)— has announced that it aims to launch more than 40 times in 2020. CASC launched 66 satellites on 27 launchers in 2019 (out of a total of 34 Chinese launches). Commercial launch companies will thus add to China's overall launches this year.
Major missions will include: Mars orbiter & rover (Jul/Aug); Chang'e-5 lunar sample return [to Earth]; maiden launches of the NEW Changzheng (CZ) or Long March 7A (GTO - geostationary transfer orbit), Long March 8 (VTVL - Vertical Takeoff, Vertical Landing), Long March 5B, the new, more powerful variant of CZ-5 series (LEO - Low Earth Orbit); last two satellites in GEO before June to complete the BeiDou-3 satellite constellation with 35 satellites (5 GEO, 27 MEO and 3 IGSO), which will further increase the accuracy of BeiDou GNSS global coverage even surpassing the accuracy of the USAF GPS; Apstar-6D satellite (DFH-4E platform, the large telecommunication satellite of new generation and advanced international satellite platform, both from the level of technology and satellite capabilities); LEO internet communication satellites (2020-01-02).
SOURCE:
From an annual CASC meeting
http://www.spacechina.com/n25/n2014789/n2014804/c2819421/content.html
As summarized by Andrew Jones from above link:
And from Henry Kenhmann at the East Pendulum:
The Chinese aerospace group CASC is planning more than 40 space launches in 2020, including the last launch of Beidou-3 satellites and Phase 3 of the lunar program.
CZ-5B, CZ-7A and CZ-8 will make their maiden launches. New missiles and the Martian probe are also expected.
China's main space contractor —China Aerospace Science and Technology Corporation (CASC)— has announced that it aims to launch more than 40 times in 2020. CASC launched 66 satellites on 27 launchers in 2019 (out of a total of 34 Chinese launches). Commercial launch companies will thus add to China's overall launches this year.
Major missions will include: Mars orbiter & rover (Jul/Aug); Chang'e-5 lunar sample return [to Earth]; maiden launches of the NEW Changzheng (CZ) or Long March 7A (GTO - geostationary transfer orbit), Long March 8 (VTVL - Vertical Takeoff, Vertical Landing), Long March 5B, the new, more powerful variant of CZ-5 series (LEO - Low Earth Orbit); last two satellites in GEO before June to complete the BeiDou-3 satellite constellation with 35 satellites (5 GEO, 27 MEO and 3 IGSO), which will further increase the accuracy of BeiDou GNSS global coverage even surpassing the accuracy of the USAF GPS; Apstar-6D satellite (DFH-4E platform, the large telecommunication satellite of new generation and advanced international satellite platform, both from the level of technology and satellite capabilities); LEO internet communication satellites (2020-01-02).
SOURCE:
From an annual CASC meeting
http://www.spacechina.com/n25/n2014789/n2014804/c2819421/content.html
As summarized by Andrew Jones from above link:
And from Henry Kenhmann at the East Pendulum:
The Chinese aerospace group CASC is planning more than 40 space launches in 2020, including the last launch of Beidou-3 satellites and Phase 3 of the lunar program.
CZ-5B, CZ-7A and CZ-8 will make their maiden launches. New missiles and the Martian probe are also expected.
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JSCh
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Beidou system on fast track of commercialization, application
Friday, January 03, 2020, 10:00By Cheng Yu
Visitors check out a model of Beidou Navigation Satellite System during an exhibition in Beijing. (ZOU HONG / CHINA DAILY)
China's Beidou Navigation Satellite System has started offering its services to a wide range of sectors as well as an expanding number of countries, as the homegrown system steps up its application and commercialization.
Beidou has had great applications in a string of areas including transportation, electrical power, fisheries, mining and agriculture, said Wang Yanyan, deputy general-secretary of the Global Navigation Satellite System and Location-Based Services Association of China.
Official data showed that the direct output of domestic satellite industries exceeded 300 billion yuan (US$43 billion) by the end of 2019, with Beidou contributing 70 to 80 percent of the total.
"In addition to the navigation function that is well-known to the public, Beidou's applications in areas like pipe leakage detection has also made substantial progress," Wang said.
She noted that Beidou's technology in pipe network detection has already been applied in at least 600 cities, counties and towns across China.
Beidou has recently cooperated with Swiss industrial giant ABB in launching the world's first gas leakage detection system with an accuracy as fine as ppb or parts per billion, overturning the traditional accuracy of parts per million seen worldwide.
"With the new move, Beidou can not only position accurately the gas leakage points but is also able to analyze data, for example, to offer solutions," Wang said.
Zhang Yijin, head of analysis meter of ABB China, said that such an application has come into the forefront of global high-accuracy gas leakage detection, which has exceeded that of the global positioning system and Google.
"It is of great importance and also business potential given that the gas network in China alone has grown from 400,000 kilometers to 800,000 kilometers in the past five years," she said.
ALSO READ: China to complete Beidou-3 satellite system in 2020
Zhang said that such technology is prepared to go into the foreign markets soon with the Beidou system set to be complete by 2020.
Currently, there are 46 operational Beidou satellites and China plans to send two more satellites in geostationary orbit in the first half of 2020 to finish the deployment of all of Beidou's space-based assets.
China began to construct its Beidou navigation system, named after the Chinese term for the Big Dipper constellation, in the 1990s and started to serve the Asia-Pacific region since 2012. It is currently one of the four largest space-based navigation networks operating globally, along with the US GPS system, Russia's GLONASS and the European Union's Galileo.
Such progress also dovetails with China's determination to step up the application of Beidou systems in a wide range of sectors as well as various regions.
Statistics from the China Satellite Navigation Office showed that as of April, the Beidou system had been put into use in more than 6.2 million taxis, buses and trucks as well as at least 40,000 fishing ships across the country.
By the end of last month, Beidou's solutions were exported to more than 120 countries and regions, according to the China Satellite Navigation Office.
The system is now being applied in more international sectors including precision farming, digital construction and smart port construction, the office said.
READ MORE: Core of Beidou navigation satellite network in place
"It is beneficial for the Association of Southeast Asian Nations, South Asia, Eastern Europe, West Asia and Africa," the office said.
With the 5G era, Beidou is also integrating with the new technologies including blockchain and artificial intelligence, according to the office.
In December, the Civil Aviation Administration of China released a roadmap for the application of Beidou, which pointed out that the civil aviation sector should gradually see full coverage from Beidou by the end of 2035.
"The application of Beidou in the segment will make up for the inadequacy of traditional navigation systems as the new application will greatly enhance safety and efficiency," said Liu Lianxi, an official at the CAAC.
Friday, January 03, 2020, 10:00By Cheng Yu
China's Beidou Navigation Satellite System has started offering its services to a wide range of sectors as well as an expanding number of countries, as the homegrown system steps up its application and commercialization.
Beidou has had great applications in a string of areas including transportation, electrical power, fisheries, mining and agriculture, said Wang Yanyan, deputy general-secretary of the Global Navigation Satellite System and Location-Based Services Association of China.
Official data showed that the direct output of domestic satellite industries exceeded 300 billion yuan (US$43 billion) by the end of 2019, with Beidou contributing 70 to 80 percent of the total.
"In addition to the navigation function that is well-known to the public, Beidou's applications in areas like pipe leakage detection has also made substantial progress," Wang said.
She noted that Beidou's technology in pipe network detection has already been applied in at least 600 cities, counties and towns across China.
Beidou has recently cooperated with Swiss industrial giant ABB in launching the world's first gas leakage detection system with an accuracy as fine as ppb or parts per billion, overturning the traditional accuracy of parts per million seen worldwide.
"With the new move, Beidou can not only position accurately the gas leakage points but is also able to analyze data, for example, to offer solutions," Wang said.
Zhang Yijin, head of analysis meter of ABB China, said that such an application has come into the forefront of global high-accuracy gas leakage detection, which has exceeded that of the global positioning system and Google.
"It is of great importance and also business potential given that the gas network in China alone has grown from 400,000 kilometers to 800,000 kilometers in the past five years," she said.
ALSO READ: China to complete Beidou-3 satellite system in 2020
Zhang said that such technology is prepared to go into the foreign markets soon with the Beidou system set to be complete by 2020.
Currently, there are 46 operational Beidou satellites and China plans to send two more satellites in geostationary orbit in the first half of 2020 to finish the deployment of all of Beidou's space-based assets.
China began to construct its Beidou navigation system, named after the Chinese term for the Big Dipper constellation, in the 1990s and started to serve the Asia-Pacific region since 2012. It is currently one of the four largest space-based navigation networks operating globally, along with the US GPS system, Russia's GLONASS and the European Union's Galileo.
Such progress also dovetails with China's determination to step up the application of Beidou systems in a wide range of sectors as well as various regions.
Statistics from the China Satellite Navigation Office showed that as of April, the Beidou system had been put into use in more than 6.2 million taxis, buses and trucks as well as at least 40,000 fishing ships across the country.
By the end of last month, Beidou's solutions were exported to more than 120 countries and regions, according to the China Satellite Navigation Office.
The system is now being applied in more international sectors including precision farming, digital construction and smart port construction, the office said.
READ MORE: Core of Beidou navigation satellite network in place
"It is beneficial for the Association of Southeast Asian Nations, South Asia, Eastern Europe, West Asia and Africa," the office said.
With the 5G era, Beidou is also integrating with the new technologies including blockchain and artificial intelligence, according to the office.
In December, the Civil Aviation Administration of China released a roadmap for the application of Beidou, which pointed out that the civil aviation sector should gradually see full coverage from Beidou by the end of 2035.
"The application of Beidou in the segment will make up for the inadequacy of traditional navigation systems as the new application will greatly enhance safety and efficiency," said Liu Lianxi, an official at the CAAC.
smooth manifold
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林晓弈China launches heaviest satellite to test key technologies
Source: Xinhua| 2019-12-27 22:14:33|Editor: Mu Xuequan
Long March-5 Y3 blasts off from Wenchang Space Launch Center in south China's Hainan Province, Dec. 27, 2019. The rocket, coded as Long March-5 Y3, blasted off from the coastal launch center at 8:45 p.m. (Beijing time), carrying the Shijian-20 technological experiment satellite weighing over eight tonnes, the heaviest and most advanced communications satellite of the country. About 2,220 seconds later, the satellite was sent into its planned orbit. (Xinhua/Yang Guanyu)
by Xinhua writers Quan Xiaoshu, Yu Fei
WENCHANG, Hainan, Dec. 27 (Xinhua) -- Aboard the third Long March-5 rocket, China's largest carrier rocket, Shijian-20, a new technology test and verification satellite, successfully entered its orbit Friday night.
The rocket, coded as Long March-5 Y3, blasted off from the Wenchang Space Launch Center in south China's Hainan Province at 8:45 p.m. (Beijing time).
Shijian-20, weighing more than eight tonnes, is the country's heaviest and most advanced communications satellite in geosynchronous orbit, according to its maker, the China Academy of Space Technology (CAST) under the China Aerospace Science and Technology Corporation (CASC).
It will carry out orbit experiments for a series of key technologies, the CAST said in a press release.
It will demonstrate in orbit its heat transfer technology based on cryogenic loop heat pipes, an efficient thermal control device for space applications, to lay the foundation for the development of highly sensitive space probes.
The satellite will test the controllable deformation of shape memory polymers, a type of smart material that can switch between temporary shapes, to pave the way for the development of large variable space structures.
It will also carry out satellite-ground communication tests using Q/V bands, which lie between 33-75 GHz, within the extremely high frequency (EHF) area of the radio spectrum. These frequencies are used mainly for satellite communications.
"The major way to improve the satellite communication capacity is to expand the bandwidth of available frequency bands. If we liken the geostationary orbit to an expressway, which is now the most crowded in space, the use of Q/V bands will help to widen the expressway by four to five times," said Li Feng, chief designer of the satellite with the CAST.
The test is key to the development of the next generation of high throughput satellites capable of delivering 1Tbps bandwidth for ultrafast speeds, he said.
Shijian-20 has the largest solar wings among all China's satellites, with the total wingspan 10 meters wider than that of a Boeing 737 aircraft.
The solar wings will unfold twice, the first time after the satellite enters its orbit and the second after it flies around the orbit for about a week. The increase of the solar wing area will supply the satellite with abundant power.
The satellite adopts a hybrid propulsion system. Chemical propulsion is powerful but inefficient, and is used in rapid orbit change or satellite attitude adjustment to send it to the planned orbit as soon as possible. Electric propulsion is more precise and efficient but less powerful, which is suitable for long-term delicate adjustments in orbit.
Electric propulsion is also a preferred technology for future deep space exploration. Missions to explore Mars, Jupiter and asteroids are all too far away from Earth to be fulfilled by chemical propulsion alone, as it is impossible to bring the amount of fuel needed.
Shijian-20 will also test the adaptability of the DFH-5 satellite platform, which may serve the needs of high-capacity satellites for high orbit communications, microwave remote sensing, optical remote sensing, space scientific exploration, in-orbit service and other purposes in the next 20 years.
"With the government's consistent support for the communications satellite industry in the past decades, we have developed the DFH-3 and DFH-4 satellite platforms, making China one of the few countries in the world that can independently develop large communications satellites and provide in-orbit commercial services," said Hao Yanyan, product assurance manager of Shijian-20 with the CAST.
So far, there are more than 20 communications satellites based on the DFH-4 platforms running stably in orbit.
To meet the pressing needs of economic development, the research and development of the DFH-5 platform started in 2010.
According to the design, the takeoff weight of a satellite based on the DFH-5 platform can reach eight to nine tonnes, and its payload capacity 1,500 to 1,800 kg. The power for the whole satellite is more than 28 kilowatts, while the power for its payload above 18 kilowatts.
"According to these technical indicators, a satellite based on the DFH-5 platform in orbit can provide services equivalent to that of two or three satellites on the DFH-4 platform," Hao said.
The new technologies verified by Shijian-20 will further promote the development of new satellites, especially the high throughput communications satellite and high resolution remote sensing satellite, which is of great significance to the progress of China's space technology, Li said.
LIPS-300 ion engine
今天 11:33 来自 航爱网牌Android 已编辑
今天早上三点左右，第七次变轨成功完成，随后，太阳能帆板二维二次展开成功，热辐射器和三重叠天线均成功展开，任务圆满成功！航天爱好者网超话 ¡查看图片
Today 11:33
At about three o'clock this morning, the seventh orbital change was successfully completed. Subsequently, the solar panel was successfully deployed two-dimensionally. The thermal radiator and the three overlapping antennas were successfully deployed. The mission was a complete success! 超 Aerospace enthusiast network super words ¡ view image
JSCh
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China Aerospace Science and Technology Corporation
Today 11:24
[Shijian-20 satellite successfully positioned! The first successful flight of the Dongfanghong-5 satellite bus/platform】
On January 5th, the Shijian 20 satellite that was developed by the Fifth Academy of the Aerospace Science and Technology Corporation, after going through seven orbital maneuvers, was successfully positioned at a geosynchronous orbit at an altitude of 36,000 kilometers, marking the first successful flight of the Dongfanghong-5 bus/platform based satellite. The launch weight of the Shijian 20 satellite is slightly more than 8 tons, and the localization rate reaches 100%. This is among the satellites ever developed by China, the heaviest, highest technological content HEO satellite with a design life of 16 years, and it is equipped with more than 10 internationally leading technology verification loads.
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JSCh
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JANUARY 6, 2020
As Digital Earth gains momentum, China is setting the pace
by Davina Jackson, The Conversation
A section of Beijing Daxing International Airport from the first 3D images released by China National Space Administration using data from the recently launched Gaofen-7 Earth observation satellite, which can resolve objects less than a metre wide. China National Space Administration/Xinhua
Al Gore's 1992 forecast of a Digital Earth—where satellites beam data to reveal all the planet's environmental dynamics—has gained momentum with the publication of the Manual of Digital Earth last month. The major anthology is sponsored by the Chinese Academy of Sciences. It's a mark of the importance China attaches to what is now a United Nations-led project named the Global Earth Observation System of Systems (GEOSS).
GEOSS seems like medical science's worldwide collaborations to map the human genome and the human brain—but at a much bigger magnitude. Scientists want to data-visualize the whole Earth. The project's scope ranges from deep subterranean core samples, volcanic tremors, ocean surface temperatures, flooding and solar storms to urban populations, migrations and sprawls.
A recent Australian contribution to the Digital Earth vision is the online mapping of bushfires. This includes the Digital Earth Australia Hotspots map run by Geoscience Australia and the New South Wales Rural Fire Service's Fire Map.
GEOSS began operating in 2005 (the same year as Google Earth) and is accelerating with the most tumultuous technology revolution in the history of cartography. It goes way beyond the satellite mapping we see on TV weather reports. And it relies on the grid of globally networked computers to access and crunch massive lakes and banks of geotagged data stored in high-security bunkers.
China's digital 'religion'
China's support for the Digital Earth and GEOSS movement has become entwined with its foreign policy. Chinese authors wrote many papers in the 26-chapter manual. And the Chinese Academy of Sciences operates the secretariat and journal of the International Society for Digital Earth (ISDE).
Recent ISDE conferences have included invitation-only workshops on how to evolve China's Digital Belt and Road program. It's the high-tech aspect of China's Belt and Road Initiative to expand its historical Silk Road trading links. China's map of desired international paths and connections now includes non-Silk Road destinations, including the Malaysian peninsula, Ukraine, Germany, England, Portugal and Morocco.
A Geneva-based Australian pioneer of supercomputing and environmental simulations, Bob Bishop, welcomed the Manual of Digital Earth. He suggested to me it "somewhat proves" that: "the religion of China in the 21st century is 'science' and their particular denomination is 'digital." China made Buddhism universal by documenting a previously oral philosophy coming from India. It seems China could make Digital Earth universal by documenting fragmented ideas coming from the US and the rest of the world."
The manual explains, in more than 250,000 illustrated words, what has been done, and what needs to be done, to develop different parts of Gore's vast ambition. Science now has all the basic capabilities to deliver a GEOSS/Digital Earth. These include:
More questionable is whether there is enough processing speed and data-storage capacity to deliver the vision yet. Bishop has suggested we probably will need to look beyond still-nascent quantum computing to far-ahead neuromorphic engineering (imitating the human nervous system at a very large scale) to evolve an effective sim-planet system. That's because, as Gore predicted, vast amounts of environmental data will need to be processed in real time.
The intergovernmental Group on Earth Observations (GEO) secretariat in the World Meteorological Organisation tower on the UN campus in Geneva is co-ordinating GEOSS. Leading space, meteorological, geoscience, surveying and UN technical agencies are among its more than 200 member organizations.
The Manual of Digital Earth is the world's first comprehensive book of scholarly papers about Digital Earth/GEOSS theories, technologies, advances and applications. (It builds on a 2013 GEO-sponsored report edited by ISDE members.)
The book summarizes recent advances and the current status of many relevant technologies. It highlights the challenge of how to smoothly transition scales during continuous zooming. It also discusses applications (including climate change, disaster mitigation and the UN Sustainable Development Goals); regional and national development (in Europe, Russia, China and Australia); and education and ethics.
Who's who in Digital Earth studies?
More than 100 experts from 18 countries contributed to the anthology. It was edited by three leaders of the International Society for Digital Earth: Huadong Guo of the Chinese Academy of Sciences, who is a professor at its Institute of Remote Sensing and Digital Earth (RADI); Michael F. Goodchild, emeritus professor of geography at the University of California Santa Barbara; and Alessandro Annoni, head of the Digital Economy Unit at the European Commission's Joint Research Centre in Ispra, Italy.
Annoni is the ISDE's president, Guo is the honorary president and Goodchild is an ISDE founder and a lead author of its most influential papers—including a next-generation Digital Earth vision statement in 2012.
The ISDE secretariat is based at the RADI in Beijing, although its presidents and senior members work in various countries. It's closely involved with the GEOSS in Europe and with the UN's Global Geospatial Information Management group in New York.
A 2019 European Union report, China: Challenges and Prospects from an Industrial and Innovation Powerhouse, examined China's escalating industrial capabilities and international ambitions. Annoni and other senior European policy leaders were authors. The report said Europe and the United States needed to boost their industrial, research and innovation performances to compete with China in key high-tech sectors.
As Digital Earth gains momentum, China is setting the pace | TechXplore
As Digital Earth gains momentum, China is setting the pace
by Davina Jackson, The Conversation
Al Gore's 1992 forecast of a Digital Earth—where satellites beam data to reveal all the planet's environmental dynamics—has gained momentum with the publication of the Manual of Digital Earth last month. The major anthology is sponsored by the Chinese Academy of Sciences. It's a mark of the importance China attaches to what is now a United Nations-led project named the Global Earth Observation System of Systems (GEOSS).
GEOSS seems like medical science's worldwide collaborations to map the human genome and the human brain—but at a much bigger magnitude. Scientists want to data-visualize the whole Earth. The project's scope ranges from deep subterranean core samples, volcanic tremors, ocean surface temperatures, flooding and solar storms to urban populations, migrations and sprawls.
A recent Australian contribution to the Digital Earth vision is the online mapping of bushfires. This includes the Digital Earth Australia Hotspots map run by Geoscience Australia and the New South Wales Rural Fire Service's Fire Map.
GEOSS began operating in 2005 (the same year as Google Earth) and is accelerating with the most tumultuous technology revolution in the history of cartography. It goes way beyond the satellite mapping we see on TV weather reports. And it relies on the grid of globally networked computers to access and crunch massive lakes and banks of geotagged data stored in high-security bunkers.
China's digital 'religion'
China's support for the Digital Earth and GEOSS movement has become entwined with its foreign policy. Chinese authors wrote many papers in the 26-chapter manual. And the Chinese Academy of Sciences operates the secretariat and journal of the International Society for Digital Earth (ISDE).
Recent ISDE conferences have included invitation-only workshops on how to evolve China's Digital Belt and Road program. It's the high-tech aspect of China's Belt and Road Initiative to expand its historical Silk Road trading links. China's map of desired international paths and connections now includes non-Silk Road destinations, including the Malaysian peninsula, Ukraine, Germany, England, Portugal and Morocco.
A Geneva-based Australian pioneer of supercomputing and environmental simulations, Bob Bishop, welcomed the Manual of Digital Earth. He suggested to me it "somewhat proves" that: "the religion of China in the 21st century is 'science' and their particular denomination is 'digital." China made Buddhism universal by documenting a previously oral philosophy coming from India. It seems China could make Digital Earth universal by documenting fragmented ideas coming from the US and the rest of the world."
The manual explains, in more than 250,000 illustrated words, what has been done, and what needs to be done, to develop different parts of Gore's vast ambition. Science now has all the basic capabilities to deliver a GEOSS/Digital Earth. These include:
- grid computing
- ubiquitous sensors to monitor environmental variables
- machine learning and robotics to automate processes
- good expertise with remote sensing data and imagery
- broadband networks to enable citizen scientists to add and access information
- international protocols and standards for writing, using and storing metadata and for exchanging data across different hardware and software systems.
More questionable is whether there is enough processing speed and data-storage capacity to deliver the vision yet. Bishop has suggested we probably will need to look beyond still-nascent quantum computing to far-ahead neuromorphic engineering (imitating the human nervous system at a very large scale) to evolve an effective sim-planet system. That's because, as Gore predicted, vast amounts of environmental data will need to be processed in real time.
The intergovernmental Group on Earth Observations (GEO) secretariat in the World Meteorological Organisation tower on the UN campus in Geneva is co-ordinating GEOSS. Leading space, meteorological, geoscience, surveying and UN technical agencies are among its more than 200 member organizations.
The Manual of Digital Earth is the world's first comprehensive book of scholarly papers about Digital Earth/GEOSS theories, technologies, advances and applications. (It builds on a 2013 GEO-sponsored report edited by ISDE members.)
The book summarizes recent advances and the current status of many relevant technologies. It highlights the challenge of how to smoothly transition scales during continuous zooming. It also discusses applications (including climate change, disaster mitigation and the UN Sustainable Development Goals); regional and national development (in Europe, Russia, China and Australia); and education and ethics.
Who's who in Digital Earth studies?
More than 100 experts from 18 countries contributed to the anthology. It was edited by three leaders of the International Society for Digital Earth: Huadong Guo of the Chinese Academy of Sciences, who is a professor at its Institute of Remote Sensing and Digital Earth (RADI); Michael F. Goodchild, emeritus professor of geography at the University of California Santa Barbara; and Alessandro Annoni, head of the Digital Economy Unit at the European Commission's Joint Research Centre in Ispra, Italy.
Annoni is the ISDE's president, Guo is the honorary president and Goodchild is an ISDE founder and a lead author of its most influential papers—including a next-generation Digital Earth vision statement in 2012.
The ISDE secretariat is based at the RADI in Beijing, although its presidents and senior members work in various countries. It's closely involved with the GEOSS in Europe and with the UN's Global Geospatial Information Management group in New York.
A 2019 European Union report, China: Challenges and Prospects from an Industrial and Innovation Powerhouse, examined China's escalating industrial capabilities and international ambitions. Annoni and other senior European policy leaders were authors. The report said Europe and the United States needed to boost their industrial, research and innovation performances to compete with China in key high-tech sectors.
As Digital Earth gains momentum, China is setting the pace | TechXplore
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VIDEO: Shijian-20 Satellite 实践-20号卫星China Aerospace Science and Technology Corporation
Today 11:24
[Shijian-20 satellite successfully positioned! The first successful flight of the Dongfanghong-5 satellite bus/platform】
On January 5th, the Shijian 20 satellite that was developed by the Fifth Academy of the Aerospace Science and Technology Corporation, after going through seven orbital maneuvers, was successfully positioned at a geosynchronous orbit at an altitude of 36,000 kilometers, marking the first successful flight of the Dongfanghong-5 bus/platform based satellite. The launch weight of the Shijian 20 satellite is slightly more than 8 tons, and the localization rate reaches 100%. This is among the satellites ever developed by China, the heaviest, highest technological content HEO satellite with a design life of 16 years, and it is equipped with more than 10 internationally leading technology verification loads.
With English subtitles
JSCh
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China successfully launches new communication technology experiment satellite
Source: Xinhua| 2020-01-08 00:40:12|Editor: huaxia
A new communication technology experiment satellite is launched by a Long March-3B carrier rocket at the Xichang Satellite Launch Center in Xichang, southwest China's Sichuan Province, Jan. 7, 2020. The satellite will be used in communication, radio, television and data transmission, as well as high throughput technology test. (Photo by Guo Wenbin/Xinhua)
XICHANG, Jan. 7 (Xinhua) -- China sent a new communication technology experiment satellite into space from Xichang Satellite Launch Center in Sichuan Province at 11:20 p.m. (Beijing Time), Tuesday.
The satellite has entered the preset orbit. It will be used in communication, radio, television and data transmission, as well as high throughput technology test.
The satellite was launched on a Long March-3B carrier rocket. It was the 324th mission for the Long March series carrier rockets.
The new satellite and the carrier rocket were developed by the Shanghai Academy of Spaceflight Technology and the China Academy of Launch Vehicle Technology, under the China Aerospace Science and Technology Corporation.
Source: Xinhua| 2020-01-08 00:40:12|Editor: huaxia
XICHANG, Jan. 7 (Xinhua) -- China sent a new communication technology experiment satellite into space from Xichang Satellite Launch Center in Sichuan Province at 11:20 p.m. (Beijing Time), Tuesday.
The satellite has entered the preset orbit. It will be used in communication, radio, television and data transmission, as well as high throughput technology test.
The satellite was launched on a Long March-3B carrier rocket. It was the 324th mission for the Long March series carrier rockets.
The new satellite and the carrier rocket were developed by the Shanghai Academy of Spaceflight Technology and the China Academy of Launch Vehicle Technology, under the China Aerospace Science and Technology Corporation.
smooth manifold
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ZJU researchers design optical cameras mounted on Long March 5 latest mission | Zhejiang University林晓弈
今天 11:33 来自 航爱网牌Android 已编辑
今天早上三点左右，第七次变轨成功完成，随后，太阳能帆板二维二次展开成功，热辐射器和三重叠天线均成功展开，任务圆满成功！航天爱好者网超话 ¡查看图片
Today 11:33
At about three o'clock this morning, the seventh orbital change was successfully completed. Subsequently, the solar panel was successfully deployed two-dimensionally. The thermal radiator and the three overlapping antennas were successfully deployed. The mission was a complete success! 超 Aerospace enthusiast network super words ¡ view image
2020-01-09 Global Communications
China’s biggest and most powerful carrier rocket, the Long March 5, kicked off its latest space mission from the Wenchang Satellite Launch Center, Hainan Province, at 20:45 on December 27, 2019.
During this liftoff, the Shijian-20 communications satellite successfully separated from the upper stage and entered geostationary transfer orbit 40 minutes later. The near 8-metric-ton Shijian-20 is based on the new large DFH-5 satellite bus. It will test Q/V band and laser communications.
To facilitate the observation and monitoring of motion devices, this satellite is loaded with 4 optical cameras which are developed by XU Zhihai’s team from Zhejiang University. They will capture optical images of satellite facades in the four directions in space.
“They can monitor the unfolding process of the cross-shaped solar wing and the three-layered communication antenna and observe the operation process of the mechanical arm,” said XU Zhihai, “In the past, researchers only relyed on telemetry signals to judge whether the solar wing and the communications antenna were operating smoothly and normally. The optical monitoring camera, however, enables technicians to observe and monitor the working state of each moving component on the satellite in a more tangible and convenient way.”
“It is of immense significance to realizing the visualization of the on-orbit test of the space innovation technology, improving the designing and manufacturing of satellite-mounted components, and boosting the technical capacity of China’s satellite system,” added XU Zhihai.
The communications satellite platform requires that the camera should be exceptionally reliable. Xu Zhihai’s team used a wide range of cutting-edge technologies, including anti-radiation glass, titanium alloy lensbarrels and permeability in the design and development of the camera, and applied triple-mode redundancy technology in core control software and hardware of the imaging circuit so as to prevent possible single-particle effects in space.
A certain number of high-energy particles fly at top speed in space. The atmosphere can protect the earth from the intrusion of these particles. However, in the geosynchronous orbit 36,000 kilometers from the ground, if high-energy particles hit the camera’s control chip, the binary code in the memory will be changed from 0 to 1 or from 1 to 0. In this case, the camera will fail to work due to the error of the control program.
In addition, the space environment is teeming with various kinds of radiation, so the lens of the camera should be made of radiation-proof glass. Its lens barrel is made of titanium alloy, which is a light weight metal material with remarkable strength and rigidity, and its thermal expansion rate is similar to that of glass, thus ensuring high-definition images even in the extreme space environment.
Because the lens is filled of air when assembled on the ground, it will cause distortion, deteriorating quality and even destruction in the vacuum in space. To this end, XU Zhihai’s team designed special vent holes on the lens to balance the internal and external air pressure, thereby ensuring reliability.
About Long March 5
This 57-meter-long rocket is the tallest, strongest and most technologically sophisticated in China’s launch vehicle family. It is capable of delivering 14 metric tons to geostationary transfer orbit and the derivative Long March 5B will be able to deliver 25 tons to low Earth orbit. The carrier rocket will be tasked with launching China’s first Mars probe and sending the Chang’e-5 lunar probe to the moon to bring lunar samples back to Earth.
JSCh
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China Telecom launches service packages for satellite communications to the public - cnTechPostChina launches first mobile telecom satellite
Source: Xinhua | 2016-08-06 01:15:28 | Editor: huaxia
Photo taken on Aug. 6, 2016 shows the Tiantong-01 satellite is launched with the Long March-3B carrier rocket at southwestern China's Xichang Satellite Launch Center. The Tiantong-01 satellite is the first satellite of China's home-made satellite mobile telecom system, and a key part of the country's space information infrastructure.(Xinhua/Du Cai)
XICHANG, Sichuan, Aug. 6 (Xinhua) -- China on early Saturday successfully launched the first satellite for mobile telecommunication.
The Tiantong-01 satellite was launched at 00:22 a.m. Beijing Time, at southwestern China's Xichang Satellite Launch Center, with the Long March-3B carrier rocket.
It is the first satellite of China's home-made satellite mobile telecom system, and a key part of the country's space information infrastructure.
More geostationary satellites will be sent into orbit for the system.
Tiantong-01 was designed by China Academy of Space Technology and its ground service will be operated by China Telecom. It will establish a mobile network with ground facilities, providing services for China, the Middle East, Africa and other areas.
The Long March-3B carrier rocket was produced by China Academy of Launch Vehicle Technology. It was the 232nd flight of the Long March series carrier rockets, and the 36th launch of the Long March-3B.
Jan 11, 2020
China Telecom hosted the Tiantong Satellite Business Conference on Friday to formally launch satellite communications services to the public.
Tiantong satellite mobile communication system is China's first self-constructed satellite mobile communication system with wide-area coverage and all-weather communication.
It has realized the R&D and production of satellites, chips, terminals, and gateways in China, guaranteeing users' communication security, and getting rid of long-term dependence on foreign satellite mobile communication services.
The Tiantong satellite mobile communication system achieves full coverage of China's territory and territorial waters, providing users with all-weather, all-day, stable and reliable mobile communication services.
Users can use Tiantong satellite mobile phones or terminals in the satellite service area to perform voice, SMS, data communication and location services.
Tiantong's satellite business uses mobile phone numbers beginning with 1740, which has achieved interconnection with the communication networks of domestic and foreign communication operators and achieved "communication with anyone at any place in the country at any time".
At present, the Tiantong satellite service has released a consumer-facing package. At present, the monthly voice package of 100 yuan includes 60 minutes of satellite calls, and the monthly package of 300 yuan includes 20M data.
Tiantong satellite mobile phones are required to use this service. However, according to China Telecom, such phones are generally much more expensive than regular phones.
JSCh
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Our space
2 minutes ago from Weibo
[Four satellites! Good news from Liang Liangliang! ] At 10:53 on January 15, 2020, China used the Long March 2D rocket at the Taiyuan Satellite Launch Center to launch the sub-meter ultra-wide field-view commercial optical remote sensing satellite "Jilin No. 1" wide field-view-01 (also known as "Red Flag One—H9") and the mission was successfully completed. The mission also carried 3 small satellites NewSat7 / 8 satellite and Tian qiconstellation 05.
This is the 325th space flight of the Long March series carrier rocket. (Photographed by Shi Yue) # 中国 航空 # # 我们 的 空间 #
From the Argentine satellite company Satellogic.
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