China Space Military：Recon, Satcom, Navi, ASAT/BMD, Orbital Vehicle, SLV, etc.

[JSCh]

https://twitter.com/x/status/1287749588145909761

 

[JSCh]

https://twitter.com/x/status/1277860334108196866

中国航天科技集团
2分钟前
【圆满成功！北斗三号系统最后一颗组网卫星入网工作】北斗卫星导航系统第55颗卫星（北斗三号系统地球静止轨道卫星）已完成在轨测试、入网评估等工作，于近日正式入网，使用测距码编号61提供定位导航授时服务。该卫星由航天科技集团五院研制，于2020年6月23日在西昌卫星发射中心发射。（来源：“中国北斗卫星导航系统”微信公众号）​

China Aerospace Science and Technology Corporation
2 minutes ago

[A complete success! The last networked satellite of Beidou-3 system has been connected to the network]

The 55th Beidou satellite navigation system (Beidou-3 geostationary orbit satellite) has completed in-orbit testing, network access evaluation and other work, and officially connected to the network, using ranging Code 61 to provide positioning and navigation timing services. The satellite was developed by the Fifth Academy of China Aerospace Science and Technology Group and was launched at the Xichang Satellite Launch Center on June 23, 2020. (Source: "China Beidou Satellite Navigation System" WeChat public account)

 

[JSCh]

Xi declares start of Beidou's full-scale global service
By Zhao Lei | chinadaily.com.cn | Updated: 2020-07-31 10:49

China launches the last satellite of the Beidou Navigation Satellite System from the Xichang Satellite Launch Center in Southwest China's Sichuan province, June 23, 2020. [Photo by Hu Xujie/For chinadaily.com.cn]

President Xi Jinping announced on Friday morning that China's Beidou Navigation Satellite System has been completed and started providing full-scale global services on the day.

Xi, who is also general secretary of the Communist Party of China Central Committee and chairman of the Central Military Commission, declared the completion of the global navigation and positioning system's third-generation network at a ceremony at the Great Hall of the People in Beijing.

This is a new milestone in China's space industry and also a major achievement in the country's efforts to boost science, technology and innovation, experts have said.

Beidou is the country's largest space-based system and one of four global navigation networks, along with the United States' GPS, Russia's GLONASS and the European Union's Galileo.

More than 300,000 scientists, engineers and technicians from more than 400 domestic institutes, universities and enterprises have been involved in Beidou's development and construction. Dozens of distinguished scientists from the Chinese Academy of Sciences and the Chinese Academy of Engineering have taken part in the program, project leaders said.

In late June, the final satellite to complete Beidou's third-generation network was lifted by a Long March 3B carrier rocket at the Xichang Satellite Launch Center in Sichuan province and was placed into a geostationary orbit about 36,000 kilometers above the Earth.

After in-orbit tests over the past month, the satellite, the 59th in the Beidou family and 30th in the third-generation series, has recently started its formal operations, according to the China Satellite Navigation Office.

Since 2000, a total of 59 Beidou satellites, including the first four experimental ones, have been launched from Xichang on 44 Long March 3-series rockets, with some of them having retired.

Beidou began providing positioning, navigation, timing and messaging services to civilian users in China and other parts of the Asia-Pacific in December 2012. At the end of 2018, it started offering basic global services.

Now, there are 30 third-generation Beidou satellites in three types of orbit — 24 in medium-Earth orbits, three in inclined geosynchronous satellite orbits and three in geostationary orbits.

There also are some second-generation Beidou satellites in operation offering regional services, said the China Satellite Navigation Office.

Timeline:

1983 -- Renowned Chinese scientists, headed by Chen Fangyun, propose to build an experimental two-satellite positioning system.

1989 -- The concept of the experimental system is demonstrated and verified by two Chinese communications satellites operating in orbit.

February 1994 -- The government approves and starts the research and development of a space-based navigation and positioning system, aiming to mitigate the country's heavy reliance on foreign networks. The system is named "Beidou".

October 2000 -- China launches the first Beidou satellite. In December that year, the second Beidou satellite lifts off to join the first one to establish an experimental system. In May 2003 and February 2007, another two experimental satellites lift off to join the trial run.

April 2007 -- Beidou's first mass-production satellite, also the first in its second-generation series, launches.

December 2012 -- Beidou starts providing positioning, navigation, timing and messaging services to civilian users in China and other parts of the Asia-Pacific.

November 2017 -- The first two third-generation Beidou satellites are launched.

December 2018 -- Beidou begins providing basic global services.

June 2020 -- The final satellite to complete the third-generation Beidou network launches.

July 2020 -- Beidou starts providing full-scale services.​

 

[JSCh]

10:45, 03-Aug-2020
Official: BeiDou system products exported to over 120 countries and regions
CGTN

Products linked to the BeiDou Navigation Satellite System (BDS) have been exported to over 120 countries and regions, according to an official.

All key parts of the system are 100 percent domestically built, and China has mastered 160 core technologies including inter-satellite links and high-precision atomic clocks, said BDS spokesperson Ran Chengqi at a press conference.

The 28-nanometer Beidou multi-mode chip has gone into mass production and its 22 nm chip will be mass-produced soon, Ran told reporters. Most smartphones support BeiDou's functions, he added.

https://twitter.com/x/status/1290127753346523142

 

[JSCh]

Major north China port switches to BeiDou navigation system
Source: Xinhua| 2020-08-02 19:46:37|Editor: huaxia

SHIJIAZHUANG, Aug. 2 (Xinhua) -- Qinhuangdao Port, a leading coal port in north China, has successfully switched all its public navigation aids to China's BeiDou Navigation Satellite System (BDS).

The port's navigation support capability has significantly improved with the BDS, which was officially commissioned Friday with the formal opening of the newly completed BDS-3 system for global users, according to the Qinhuangdao navigation aids department of the Navigation Guarantee Center of North China Sea (NGCN), the Ministry of Transport.

Among all the navigation tools, the 120-year-old Nanshantou beacon has performed more efficiently with the new navigation system.

The operation status of the lighthouse was on display in real-time, so were its communication records. The new system automatically examines and reports any failure before raising the alarm, said Ao Zidong, a maintenance staff with the Qinhuangdao navigation aids department. For years, they had to climb atop the beacon to check when the old system raised the alarm.

"The unique text messaging function of BDS enables our users to communicate when there is no communication base station or mobile phone signal on the sea," he said.

The Nanshantou beacon's newly replaced lamps were developed with the BeiDou technology, which has increased its maximum range from 20 nautical miles to 27 nautical miles.

BDS is one of four global navigation-satellite systems in the world. The other three are GPS of the United States, Galileo of the European Union, and GLONASS of Russia.

 

[JSCh]

央视新闻
29分钟前 来自 微博 weibo.com
#高分九号04星发射成功#【一箭双星！#清华科学卫星发射成功#

】今天12时01分，我国在酒泉卫星发射中心用长征二号丁运载火箭，成功将高分九号04星送入预定轨道，发射获得圆满成功！此次任务还搭载发射了清华科学卫星，由清华大学负责研制，将在轨对重力卫星系统设计方法、基于双频GPS的精密轨道大气密度测量方法等理论与技术进行飞行验证。（总台央视记者杨弘杨）

CCTV News
29 minutes ago from weibo

At 12:01 today, China used the Long March 2D carrier rocket at the Jiuquan Satellite Launch Center to successfully put the Gaofen-9 04 satellite into the scheduled orbit. The launch was a complete success! The mission also carried the Tsinghua Science Satellite, which was developed by Tsinghua University and will verify in orbit, theory and technology on the design of gravity satellite, high precision atmospheric density measurement methodology based on dual-frequency GPS etc. (Headquarters CCTV reporter Yang Hongyang)

​

 

[onebyone]

https://forum.nasaspaceflight.com/index.php?action=dlattach;topic=51619.0;attach=1961357;sess=0

 

[JSCh]

Hainan eyes new satellite network
By Zhao Lei | China Daily | Updated: 2018-08-16 08:59

The heavy-lift carrier rocket Long March 5 blasts off Nov 3, 2016 at Wenchang Space Launch Center in South China's Hainan province.[Photo/Xinhua]

The southernmost island province of Hainan is preparing a satellite network that is expected to enable China to conduct effective and efficient surveillance over the South China Sea.

Design work for the Hainan Earth-Observation Satellite Constellation, a project headed by the Sanya Institute of Remote Sensing in Hainan and sponsored by the provincial government, has begun at the institute and by its contractors.

The first in the constellation, a Hainan 1 optical satellite, is scheduled to be launched in the second half of 2019, according to a statement from the institute.

The statement said the constellation will have 10 satellites that will be launched in four stages by the end of 2021. First, three Hainan 1 optical satellites are scheduled to enter orbit in 2019. The following year, three Hainan 1 satellites and two Sanya 1 multispectral remote-sensing satellites will be launched. In 2021, two Sansha 1 synthetic aperture radar satellites are expected to be sent into space.

At a meeting in Sanya on Tuesday, Chinese space experts reviewed and approved technical plans for the first four Hainan 1 satellites.

According to the institute, each Hainan 1 will weigh 50 kilograms, and will operate in a low-Earth orbit 500 kilometers above Earth and move at 7.9 km per second.

Yang Tianliang, director of the institute and chief designer of the constellation, said in a phone interview on Wednesday that Hainan 1 satellites will carry two types of instruments - cameras and identification technology.

"The combination of cameras and automatic identification systems will allow us not only to monitor ships lawfully sailing in the South China Sea, but also to detect and track illegally operating ones," Yang said.

Automatic identification systems can receive and process signals concerning positioning data, courses of vessels as well as speed readings sent by a moving ship. The technology is often mounted on ships and satellites and assists vessel operators in understanding maritime traffic situations while also helping maritime authorities to track and monitor vessel movements.

Yang said Hainan administers hundreds of islands and reefs in the South China Sea, so it requires the assistance of a space-based platform to monitor these territories and surrounding waters.

He also noted that once the satellite network becomes fully operational by 2021, it will be able to cover the entire South China Sea and will be very helpful in a wide range of sectors, such as marine transportation, fisheries, island management and maritime search and rescue.

Gao Enyu, a manager from Hainan MinoSpace Technology Co, was quoted by China News Service as saying on Tuesday that researchers optimized Hainan 1's cameras to make them suitable for monitoring large expanses of waters.

He added that the satellite is capable of detecting and identifying all midsize and large vessels.

Gao's company is in charge of the research and development of some of Hainan 1's equipment.

https://twitter.com/x/status/1290545865631895552

 

[Figaro]

https://twitter.com/x/status/1292515476753399808

 

[JSCh]

China's IoT satellites complete phase-1 in-orbit tests
Source: Xinhua| 2020-06-12 20:58:00|Editor: huaxia

Two satellites, Xingyun-2 01 and 02, are launched by a Kuaizhou-1A (KZ-1A) carrier rocket from the Jiuquan Satellite Launch Center in northwest China, May 12, 2020. (Photo by Shan Biao/Xinhua)

WUHAN, June 12 (Xinhua) -- Two satellites for China's space-based Internet-of-Things (IoT) project have completed phase-1 tests in orbit, sources with the China Aerospace Science and Industry Corporation said.

The satellites, Xingyun-2 01 and 02, were launched by a Kuaizhou-1A carrier rocket on May 12 from the Jiuquan Satellite Launch Center.

Engineers tested the satellite platforms, payloads, and key technologies such as inter-satellite links. The results were in line with expectations, the corporation said.

Additional in-orbit tests will be continued for the completion of the Xingyun project, China's first self-developed, space-based IoT constellation.

The project is anticipated to solve problems detected in the IoT businesses' communication blind-zone, as a result of deficient coverage of cellular wireless communication networks.

By around 2023, the Xingyun project will have completed construction of the space-based IoT constellation with 80 low-orbit communication satellites.

The Xingyun-2 01 and 02 satellites employ the technology of inter-satellite laser links, which enables the in-orbit satellites to communicate over long distances and hence upgrade the real-time performance of communication services.

航天见闻
今天 13:47 来自 航天见闻超话
【“行云二号”两颗卫星实现双向通信，激光链路技术得到成功验证】近日，“行云二号”01星、02星之间实现了建链流程完整、遥测状态稳定的双向通信，这意味着“行云二号”卫星搭载的激光通信载荷技术得到成功验证，我国卫星物联网星座实现星间激光通信零的突破。至此，两颗卫星自今年5月12日发射入轨开展在轨技术测试以来，所有核心技术均得到充分验证。

目前，星间激光链路技术已成为全球卫星通信系统发展的关键技术。公开资料显示，全球中低轨道星座项目中，仅有美国的Starlink星座、LeoSat星座提出了采用星间激光链路实现空间组网的计划。而在国内，行云公司抓总研制了国内最小的星间激光通信载荷，实现了国内卫星物联网星座激光通信零的突破，打通了卫星物联网星座间信息传输的瓶颈制约。​

Aerospace experience
Today 13:47 from aerospace

[Two satellites of "Xingyun-2" realize two-way communication, and the laser link technology has been successfully verified]

Recently, "Xingyun-2" 01 and 02 have achieved two-way communication with full complete link establishment under stable telemetry status. This means that the laser communication payload technology carried by the "Xingyun-2" satellite has been successfully verified. Ever since the two satellites were launched into orbit on May 12 this year to carry out in-orbit technical testing, all core technologies have now been fully verified.

At present, inter-satellite laser link technology has become a key technology for the development of global satellite communication systems. Public information shows that among the global low and medium orbit constellation projects, only the Starlink constellation and LeoSat constellation in the United States have proposed plans to use inter-satellite laser links to achieve space networking. In China, Xingyun has developed the smallest inter-satellite laser communication payload in China, achieving a breakthrough in laser communication, and fixed the bottleneck of inter satellite information transmission of IoT constellation.

 

[JSCh]

央视新闻
17分钟前 来自 微博 weibo.com
【转发祝贺！#高分七号卫星发射成功#

】记者从国家航天局获悉，今天11时22分，我国在太原卫星发射中心用长征四号乙运载火箭，成功发射高分七号卫星。高分七号卫星是我国首颗民用亚米级光学传输型立体测绘卫星。该星运行后将在国土测绘、城乡建设、统计调查等方面发挥重要作用。（央视记者李厦）
CCTV News
17 minutes ago from Weibo

[Forward congratulations! #高分七号号 successfully launched #[威武]]
The reporter learned from the National Space Administration that at 11:22 today, China used the Long March 4B carrier rocket at the Taiyuan Satellite Launch Center to successfully launch the Gaofen-7. The Gaofen-7 is China's first civilian sub-meter optical three dimension mapping satellite. After the satellite begin operation, it will play an important role in land surveying and mapping, urban and rural construction, and statistical surveys. (CCTV reporter Li Xia)

​

林晓弈
4分钟前 来自 微博 weibo.com
此次发射任务成功验证了基于栅格舵系统的一子级落区控制技术，该技术的应用将为后续重复使用运载火箭的研制奠定了坚实的技术基础。 ¡查看图片
4 minutes ago from Weibo
The launch mission successfully verified first stage drop-zone control technology based on the grid fin system. The application of this technology will lay a solid technical foundation for the subsequent development of reusable launch vehicle. ¡ view image

​

https://twitter.com/x/status/1190865283357007877

10:51, 20-Aug-2020
China's Gaofen-7 satellite officially put into use
CGTN

China's Earth observation satellite Gaofen-7 has been officially put into use, according to the China National Space Administration on Thursday.

Launched on November 3, 2019, Gaofen-7 is an important part of China's high-definition Earth observation project. It's the country's first civil-use optical transmission three-dimensional surveying and mapping satellite that reaches the sub-meter definition.

Gaofen-7 will help solve problems in monitoring geographical conditions, housing and urban-rural construction and national statistics, according to Xinhua News Agency quoting chief designer of the Gaofen-7 at the China Academy of Space Technology.

 

[JSCh]

https://twitter.com/x/status/1296170066694684674

 

[samsara]

10:51, 20-Aug-2020
China's Gaofen-7 satellite officially put into use
CGTN

China's Earth observation satellite Gaofen-7 has been officially put into use, according to the China National Space Administration on Thursday.

Launched on November 3, 2019, Gaofen-7 is an important part of China's high-definition Earth observation project. It's the country's first civil-use optical transmission three-dimensional surveying and mapping satellite that reaches the sub-meter definition.

Gaofen-7 will help solve problems in monitoring geographical conditions, housing and urban-rural construction and national statistics, according to Xinhua News Agency quoting chief designer of the Gaofen-7 at the China Academy of Space Technology.

Update: China's Gaofen-7 satellite put into service

Source: Xinhua| 2020-08-20 20:48:59|Editor: huaxia

A new Earth observation satellite, Gaofen-7, is launched on a Long March-4B rocket from the Taiyuan Satellite Launch Center in north China's Shanxi Province, Nov. 3, 2019. (Photo by Sun Gongming/Xinhua)

BEIJING, Aug. 20 (Xinhua) -- The China National Space Administration announced on Thursday that the Gaofen-7 Earth observation satellite has been put into service, representing significant progress for the country's surveying and mapping capabilities.

Launched on Nov. 3, 2019, Gaofen-7 is China's first civil-use optical transmission 3D surveying and mapping satellite that reaches the sub-meter level.

Equipped with two line-scan cameras and a laser altimeter, the satellite can provide 1:10,000 scale satellite 3D mapping for users in China and countries participating in the Belt and Road Initiative.

Image obtained by the Gaofen-7 Earth observation satellite on Nov. 13, 2019 shows a view of the Beijing Capital International Airport. (China National Space Administration/Handout via Xinhua)

During in-orbit tests, satellite functions such as the monitoring of geographical conditions, agricultural surveys, and road constructions have been verified, said Zhang Kejian, head of the administration.

In May, using data from the Gaofen-7 and Ziyuan III satellites, scientists drew a 1:10,000 scale topographic map for surveyors to measure the height of Mount Qomolangma. [note: British named it Mount Everest]

Image obtained by the Gaofen-7 Earth observation satellite on March 18, 2020 shows a view of Mount Qomolangma. (China National Space Administration/Handout via Xinhua)

Since the Gaofen project began in 2010, China has had an increasingly clearer view of the planet. According to the administration, data from the Gaofen series of satellites have been used in more than 20 industries across the country.

Images captured by the Gaofen-2 satellite were used to help monitor the construction work of two makeshift hospitals, Huoshenshan and Leishenshan, in Wuhan, after the COVID-19 outbreak.

Image obtained by the Gaofen-7 Earth observation satellite on June 6, 2020 shows a view of Huludao City in northeast China's Liaoning Province. (China National Space Administration/Handout via Xinhua)

Gaofen-3 has contributed to the monitoring of the flood situation along Poyang Lake, China's largest freshwater lake, in the eastern province of Jiangxi.

With Gaofen satellite data, researchers also conducted ecological environment investigations for poor areas in the northwestern province of Gansu.

"Gaofen-7 will further meet the needs of users in basic mapping, global geographic information, monitoring, and evaluation in urban and rural construction, etc.," said Zhang. ■

http://www.xinhuanet.com/english/2020-08/20/c_139305662.htm

* * * * *

China newest satellite goes into service - CGTN (2020-08-20)

China's Gaofen-7 imaging satellite has officially gone into service, and it promises to be the most advanced in the series. It's the country's first civil-use 3D surveying and mapping satellite and can produce highly detailed images and data in real time. The Gaofen-7 was launched last November but underwent rigorous testing. It's being hailed as a milestone for China.

 

[JSCh]

China sends new high-resolution remote sensing satellite into space
Source: Global Times Published: 2020/8/23 10:50:10

Photo: Wang Jiangbo

China successfully sent the Gaofen-9 05 – a high resolution Earth observation satellite – into planned orbit via a Long March-2D carrier rocket from the Jiuquan Satellite Launch Center in Northwest China’s Gansu Province on Sunday morning at around 10:30 am.

The Gaofen-9 05 is an optical remote-sensing satellite that is capable of providing photographs with a resolution of less than a meter.

It will be used for land surveys, urban planning, road network design, agriculture and disaster relief, and support the construction of the China-proposed Belt and Road Initiative, the Global Times learned from China’s space authorities.

A multi-functional experiment satellite that was developed by China’s People’s Liberation Army (PLA) Academy of Military Sciences, and Tiantuo-5, a spacecraft developed by the National University of Defense Technology, were also launched during the mission.

Photo: Wang Jiangbo

Photo: Wang Jiangbo

The multi-functional experiment satellite will carry out work in a series of new fields in orbit ranging from communication to navigation. Tiantuo-5 will be used to verify in-orbit information collection capabilities from ships, spacecraft and Internet of Things.

The Sunday mission marks the 343rd flight of the Long March rocket family.

 

[samsara]

航天见闻 ​

今天 13:47 来自 航天见闻超话​

【“行云二号”两颗卫星实现双向通信，激光链路技术得到成功验证】近日，“行云二号”01星、02星之间实现了建链流程完整、遥测状态稳定的双向通信，这意味着“行云二号”卫星搭载的激光通信载荷技术得到成功验证，我国卫星物联网星座实现星间激光通信零的突破。至此，两颗卫星自今年5月12日发射入轨开展在轨技术测试以来，所有核心技术均得到充分验证。​

​

目前，星间激光链路技术已成为全球卫星通信系统发展的关键技术。公开资料显示，全球中低轨道星座项目中，仅有美国的Starlink星座、LeoSat星座提出了采用星间激光链路实现空间组网的计划。而在国内，行云公司抓总研制了国内最小的星间激光通信载荷，实现了国内卫星物联网星座激光通信零的突破，打通了卫星物联网星座间信息传输的瓶颈制约。​

Aerospace experience
Today 13:47 from aerospace

[Two satellites of "Xingyun-2" realize two-way communication, and the laser link technology has been successfully verified]

Recently, "Xingyun-2" 01 and 02 have achieved two-way communication with full complete link establishment under stable telemetry status. This means that the laser communication payload technology carried by the "Xingyun-2" satellite has been successfully verified. Ever since the two satellites were launched into orbit on May 12 this year to carry out in-orbit technical testing, all core technologies have now been fully verified.

At present, inter-satellite laser link technology has become a key technology for the development of global satellite communication systems. Public information shows that among the global low and medium orbit constellation projects, only the Starlink constellation and LeoSat constellation in the United States have proposed plans to use inter-satellite laser links to achieve space networking. In China, Xingyun has developed the smallest inter-satellite laser communication payload in China, achieving a breakthrough in laser communication, and fixed the bottleneck of inter satellite information transmission of IoT constellation.

Inter-satellite laser communication is a communication method that uses laser beams to transmit images, voices, signals and other information in space. It has high transmission rate, strong anti-interference ability, small system terminal size, light weight, and low power consumption. The advantage can greatly reduce the dependence of the satellite constellation system on the ground network, thereby reducing the number and construction cost of ground stations, expanding the coverage area, and realizing global measurement and control.

The laser communication payload of "Xingyun-2" 01 and 02 satellites has a mass of 6.5 kilograms and a power consumption of 80 watts in orbit. "Xingyun II" 01 and 02 were developed by the Aerospace Xingyun Technology Co., Ltd., a subsidiary of China Aerospace Sanjiang Group Co., Ltd., and are the first satellites of the space-based Internet of Things (Xingyun Project). It was successful launched on May 12, 2020. After launching into orbit, a series of on-orbit technology verification and industry demonstration application tests were launched.