Тяньгун-2 – CZ-2F №T2 – Цзюцюань – 15.09.2016, 14:04 UTC

Автор Димитър, 21.05.2013 19:33:19

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tnt22

http://www.xinhuanet.com/english/2019-07/19/c_138241321.htm
ЦитатаChina's space lab Tiangong-2 reenters atmosphere under control
Source: Xinhua | 2019-07-19 21:41:09 | Editor: Liangyu

BEIJING, July 19 (Xinhua) -- China's space lab Tiangong-2 reentered the earth's atmosphere under control at around 9:06 p.m. on Friday (Beijing time), China Manned Space Agency (CMSA) said.

A small amount of the spacecraft's debris fell into the predetermined safe sea area in the South Pacific, according to the agency.

Tiangong-2's controlled reentry into the atmosphere marks the successful completion of all the tasks in the space lab phase in China's manned space program, said Zhou Jianping, chief designer of China's manned space program.

Efforts are being made to step up preparations for constructing China's space station, CMSA said.

Tiangong-2, an improved version of Tiangong-1, is considered China's first space lab. Launched on September 15, 2016, the space lab has worked in orbit over 1,000 days, much longer than its 2-year designed lifespan.

Comprising an experiment module and a resource module, the space lab has a total length of 10.4 meters, a maximum diameter of 3.35 meters and a takeoff weight of 8.6 tonnes. After its solar panels are unfolded, its wingspan reaches 18.4 meters.

Tiangong-2 has docked with the Shenzhou-11 manned spaceship and Tianzhou-1 cargo spacecraft. Chinese astronauts Jing Haipeng and Chen Dong stayed for a period of 30 days in the space lab.

tnt22

Официально

http://en.cmse.gov.cn/art/2019/7/19/art_73_33203.html
Цитата
Tiangong-2 Space Laboratory Successfully Reentered into Atmosphere under Control
2019-07-19

According to latest news from China Manned Space Agency (CMSA), Tiangong-2 Space Laboratory has deorbited and reentered into atmosphere on Beijing time 21:06 pm July 19th, 2019. A small amount of residual load survived reentry and splashed down to the scheduled safe zones of the south Pacific Ocean. The controlled reentry of Tiangong-2 marks the successful completion of all tasks in the stage of space laboratory on China Manned Space Program.

Since launched on Sep 15th, 2016, Tiangong-2 has completed 4 times of dockings with Shenzhou-11 manned spaceship and Tianzhou-1 cargo spaceship successively. During the orbital flights, Tiangong-2 supported 2 astronauts to live and work for 30 days, and realized a series of key technologies breakthroughs not only as astronauts' mid-term stay in space and propellant refueling, and also completed a number of extended tests during its extended service. These important accumulated experiences laid a solid foundation for the development, construction and operations for future's China Space Station.

Large number of payloads and equipment were installed in Tiangong-2, including of 14 utilization payloads weighing 600kg, space medical experimental equipment and on-orbit maintenance test equipment, meanwhile more than 60 experiments and technical tests were successfully carried out, followed by quite a lot of achievement at international leading levels with significant utilization benefits, all of which make Tiangong-2 to be the first "real space laboratory" of China. Space cold atomic clock on board of Tiangong-2 is the first orbital clock in the world, and daily stability reaches 7.2E-16 based on the results of on-orbit test. Jointly developed by CMSA and ESA, POLAR is the first specialized universal Gamma-Rays (GRBs) polarization detecting instrument with a large wide field of view and high efficiency. 55 cases of GRBs have been successfully detected, which has made an important contribution to the joint detection of GRBs. In addition, Tiangong-2 also carried three award-winning experiments in the space science and technology design competition from Hong Kong middle school students, including sericulture in space, double pendulum experiment and water film reaction, and achieves good social and educational benefits.

As introduced, China Manned Space Program was formally established and implemented since 1992. Based on the "Three-step Strategy" of development, after more than 20 years of independent development and consecutive striving, CMSA has sent 11 manned spaceships, 1 cargo spaceship, 1 target spacecraft, 1 space laboratory into space, and has totally realized 11 astronauts' space flight (14 person times) and their safe returns. All the preset tasks were successfully accomplished in the first and second steps, which laid a solid foundation for the third step to build the China's own space station, providing a solution for space utilization of larger scale with man-tending on a long term basis. CMSA and The United Nations Office for Outer Space Affairs (UNOOSA) jointly released the final result of the first bench of international cooperation projects on space utilizations of China Space Station in Vienna on June 12th, 2019. Nine projects from 17 countries on five continents were successfully selected, which marks Chinese Manned Space Program has taken an important step from independent development to global cooperation.

At present, the overall lines of the program are making intense efforts to prepare for the space station mission, and standing by with high morale for new expeditions, to welcome the 70th anniversary of the People's Republic of China.

(Editor : 周雁)

tnt22

Цитата Jonathan McDowell‏ Подлинная учетная запись @planet4589 58 мин. назад
Official Chinese statement now out. Tiangong 2 is down,  on the first opportunity in today's set of passes over the S Pacific.


53 мин. назад
Final TG2 groundtrack


tnt22

Цитата Jonathan McDowell‏ Подлинная учетная запись @planet4589 48 мин. назад
My modelling of the orbit data suggests a 45 m/s retroburn at 1235 UTC, last apogee, would change the orbit to 35 x 376 km and lead to TG2 passing 120 km altitude around 1306 UTC over 155W 21N, with breakup likely at 70-80 km at about 1310 UTC over 140W 31S



48 мин. назад
This is right at the NW (top left) corner of the announced reentry region.



40 мин. назад
The two Tiangong-2 deorbit burns (yesterday and today), by my estimate, used about 283 kg of propellant. Estimated reentry mass of TG-2 was 8260 kg.


tnt22

Цитата Jonathan McDowell‏ Подлинная учетная запись @planet4589 27 мин. назад
Another plot of the final TG2 ground track; yellow section at end is from when China says it came down (my estimate says 120 km alt) to when I think it probably broke up 4 min later (my estimate says 75-80 km alt)


tnt22

https://tass.ru/kosmos/6682707
Цитата19 ИЮЛ, 16:57 Обновлено 17:00
Китайская космическая лаборатория "Тяньгун-2" вошла в атмосферу Земли

Обломки станции упали в безопасном районе в южной части Тихого океана

ПЕКИН, 19 июля. /ТАСС/. Китайская космическая лаборатория "Тяньгун-2" в пятницу в 21:06 по местному времени (16:06 мск) вошла в атмосферу Земли, ее обломки упали в безопасном районе в южной части Тихого океана. Об этом говорится в сообщении, размещенном на сайте Программы пилотируемых полетов КНР.

"Станция под контролем вошла в атмосферу, что означает полное завершение ее миссии", - отмечается в заявлении.

В 17:30 по местному времени (12:30 мск) "Тяньгун-2" находилась на эллиптической орбите, минимальное удаление которой от поверхности Земли составляло 190 км, максимальное - 370 км.

Вторая орбитальная станция Китая

"Тяньгун-2" - второй китайский посещаемый пилотируемый аппарат. Модуль был запущен в космос 15 сентября 2016 года, с его помощью проверялась технология жизнеобеспечения для будущей китайской орбитальной станции и отработка стыковки с грузовыми кораблями. Лаборатория была обитаема на протяжении 30 дней, с 18 октября по 17 ноября 2016 года. На ее борту работали тайконавты Цзин Хайпэн и Чэнь Дун, после этого станция продолжила полет в автономном режиме.

20 апреля 2017 года с космодрома Вэньчан (южная провинция Хайнань) при помощи ракеты-носителя "Чанчжэн-7" был запущен грузовой корабль "Тяньчжоу-1". Он осуществил три стыковки и дозаправки "Тяньгун-2" в автоматическом режиме в апреле, июне и сентябре 2017 года. После этого грузовик был сведен с орбиты и сгорел в атмосфере.

tnt22

http://www.xinhuanet.com/english/2019-07/19/c_138241415.htm
ЦитатаChina's space lab Tiangong-2 reenters atmosphere under control
Source: Xinhua | 2019-07-19 22:21:51 | Editor: Liangyu

BEIJING, July 19 (Xinhua) -- China's space lab Tiangong-2 reentered the earth's atmosphere under control at around 9:06 p.m. on Friday (Beijing time), China Manned Space Agency (CMSA) said.

A small amount of the spacecraft's debris fell into the predetermined safe sea area in the South Pacific, according to the agency.

Tiangong-2's controlled reentry into the atmosphere marks the successful completion of all the tasks in the space lab phase in China's manned space program, said Zhou Jianping, chief designer of China's manned space program.

Efforts are being made to step up preparations for constructing China's space station, CMSA said.

Tiangong-2, an improved version of Tiangong-1, is considered China's first space lab. Launched on Sept. 15, 2016, the space lab has worked in orbit over 1,000 days, much longer than its 2-year designed lifespan.

Comprising an experiment module and a resource module, the space lab has a total length of 10.4 meters, a maximum diameter of 3.35 meters and a takeoff weight of 8.6 tonnes. After its solar panels are unfolded, its wingspan reaches 18.4 meters.

Tiangong-2 has docked with the Shenzhou-11 manned spaceship and Tianzhou-1 cargo spacecraft. Chinese astronauts Jing Haipeng and Chen Dong stayed 30 days in the space lab.

"With the successful controlled deorbit, the Tiangong-2 mission has been completed perfectly. It demonstrates that China sticks firmly to its international duties and keeps its promise of peaceful and scientific use of space resources," said Zhu Congpeng, chief designer of Tiangong-2 from the China Academy of Space Technology (CAST).

"Although Tiangong-2 had been in operation nearly one year longer than its designed lifespan, its platform and payloads functioned stably and soundly, and the propellant it carried was still sufficient to support its flight in orbit for another several years," Zhu said, "It's hard to say goodbye to Tiangong-2, but considering reliability- and safety-related factors, we have to drive it out of orbit now."

"To let Tiangong-2 'retire' by choice is to ensure the absolute safety of its departure," Zhu said.

With its time in operation prolonged, its reliability would decrease. Once any abnormalities occurred, Tiangong-2 would gradually fall into the Earth's atmosphere out of control. Some materials with a high melting point might not be burnt out completely, and a small amount of debris would be possibly left hitting the ground and endangering the people in the vicinity, he explained.

"A controlled breakaway from the orbit ensures the ground safety by descending the space lab in the designated area at the designated time," he said.

tnt22

http://www.xinhuanet.com/english/2019-07/19/c_138241492.htm
ЦитатаChinese scientists say goodbye to Tiangong-2, expecting space station
Source: Xinhua | 2019-07-19 23:22:51 | Editor: yan

BEIJING, July 19 (Xinhua) -- After helping scientists complete many significant experiments such as growing rice and vegetables in space, observing the strongest explosions in the universe and setting up the most precise clock in space, China's first space lab Tiangong-2 ended its mission and reentered the atmosphere under control Friday night (Beijing Time).

With deep attachment, Chinese scientists recalled the experience of participating in the design and implementation of the space experiments on Tiangong-2 and also looked forward to more frontier research on China's future space station.

Zheng Huiqiong, a researcher at the Institute of Plant Physiology and Ecology of the Chinese Academy of Sciences (CAS), still remembered how she nervously waited for astronauts in November 2016 to bring back a small box containing the Arabidopsis thaliana, a kind of vegetable, which had grown on Tiangong-2 for about 50 days.

As the lead scientist of the experiment, she was the first one to see the plant with a little blossom.

"That was an unparalleled exciting moment," Zheng said.

Zheng's team put seeds of Arabidopsis thaliana and rice in the space lab to allow them to complete the growth process from seeds to producing seeds in space, the first such experiment carried out by Chinese scientists.

From the small box brought back by astronauts, the team harvested nine seeds, which have generated the fourth generation on Earth.

"The Tiangong-2 mission was our first opportunity to carry out a long-term plant experiment in space. This experiment is significant because growing grains and vegetable will be a necessity if humans want to leave the earth and have long-term survival and travel in space," Zheng said.

Many interesting and important discoveries have been made in the experiments of Tiangong-2.
 :
"We found that plants grow slower in space than on Earth and blossom later. However, they live longer in space than on Earth. The lifespan of Arabidopsis thaliana in space was about twice as long as on Earth. We believe that the genes related to aging change in space," Zheng said.

"If we find the method to regulate the growth of plants, we could postpone the blooming of vegetables to make them grow more leaves and accelerate the blooming of rice to make them seed as soon as possible. Therefore, we can use the limited resources in space to maximize crop yields. The research can also find its application back on Earth," said Zheng.

Yin Dekui, a researcher at the Shanghai Institute of Technical Physics of CAS, recalled that his team had tested the multi-angle wide-band imaging spectrometer on an airplane before the instrument was installed on Tiangong-2. The researchers persisted in the bumpy plane for the experiment while vomiting.

Zhang Yunhua, a researcher at the National Space Science Center of CAS, said Tiangong-2 has provided valuable opportunities for Chinese scientists to test their new technologies and methods. His team developed a three-dimensional microwave altimeter and tested it on Tiangong-2 to improve China's ocean observation capability.

The success of the Tiangong-2 mission has ushered in the era of building China's space station, which is expected to be completed around 2022.

Weighing 66 tonnes, the Tiangong space station will be a T shape with the Tianhe core module at the center and the Wentian and Mengtian lab capsules on each side.

The station, orbiting 340 to 450 kilometers above the Earth's surface, could be enlarged to 180 tonnes if required and accommodate three to six astronauts. It is designed to last at least 10 years, but this could be prolonged through in-orbit maintenance, Zhou Jianping, chief designer of China's manned space program, has said.

Sixteen experiment racks will be installed on the space station to support hundreds of space research projects, according to the Technology and Engineering Center for Space Utilization of CAS.

"The experiments on Tiangong-2 have laid the foundation for further experiments and research on the space station. For instance, we want to study the intrinsic mechanism of prolonged life in space," said Zheng.

"Although Tiangong-2 was successful, we still have many regrets about the experiment. We hope to have the opportunity to do better on the space station," She added.

Tiangong-2 tested the first-ever cold atom clock in space, which was so accurate that it would only lose one second in 30 million years. The development of the clock would have a far-reaching impact on the deep space exploration, basic physical research and precision measurement, according to its developers from the Shanghai Institute of Optics and Fine Mechanics of CAS.

China's space station will carry a hydrogen clock, a cold atomic clock and an optical clock to establish a high-precision time and frequency system. The margin of error of the system would be less than one second every 3 billion years.

Zhang Lixian, a designer of the experiment racks of China's space station, said each rack could be regarded as a lab moved into space and capable of supporting various cutting-edge space experiments.

For instance, one rack is equipped with an automatic mechanical arm with an operational accuracy of better than five microns, which could support experiments at the level of the nucleus, according to Zhang.

tnt22

http://www.xinhuanet.com/english/2019-07/19/c_138241497.htm
ЦитатаChina's space lab Tiangong-2 reenters atmosphere under control
Source: Xinhua | 2019-07-19 23:28:01 | Editor: yan

BEIJING, July 19 (Xinhua) -- China's space lab Tiangong-2 reentered the earth's atmosphere under control at around 9:06 p.m. on Friday (Beijing time), China Manned Space Agency (CMSA) said.

A small amount of the spacecraft's debris fell into the predetermined safe sea area in the South Pacific, according to the agency.

Tiangong-2's controlled reentry into the atmosphere marks the successful completion of all the tasks in the space lab phase in China's manned space program, said Zhou Jianping, chief designer of China's manned space program.

Efforts are being made to step up preparations for constructing China's space station, CMSA said.
 :
Tiangong-2, an improved version of Tiangong-1, is considered China's first space lab. Launched on Sept. 15, 2016, the space lab has worked in orbit over 1,000 days, much longer than its 2-year designed lifespan.

Comprising an experiment module and a resource module, the space lab has a total length of 10.4 meters, a maximum diameter of 3.35 meters and a takeoff weight of 8.6 tonnes. After its solar panels are unfolded, its wingspan reaches 18.4 meters.

Tiangong-2 has docked with the Shenzhou-11 manned spaceship and Tianzhou-1 cargo spacecraft. Chinese astronauts Jing Haipeng and Chen Dong stayed 30 days in the space lab.

"With the successful controlled deorbit, the Tiangong-2 mission has been completed perfectly. It demonstrates that China sticks firmly to its international duties and keeps its promise of peaceful and scientific use of space resources," said Zhu Congpeng, chief designer of Tiangong-2 from the China Academy of Space Technology (CAST).

"Although Tiangong-2 had been in operation nearly one year longer than its designed lifespan, its platform and payloads functioned stably and soundly, and the propellant it carried was still sufficient to support its flight in orbit for another several years," Zhu said, "It's hard to say goodbye to Tiangong-2, but considering reliability- and safety-related factors, we have to drive it out of orbit now."

"To let Tiangong-2 'retire' by choice is to ensure the absolute safety of its departure," Zhu said.

With its time in operation prolonged, its reliability would decrease. Once any abnormalities occurred, Tiangong-2 would gradually fall into the Earth's atmosphere out of control. Some materials with a high melting point might not be burnt out completely, and a small amount of debris would be possibly left hitting the ground and endangering the people in the vicinity, he explained.

"A controlled breakaway from the orbit ensures the ground safety by descending the space lab in the designated area at the designated time," he said.

To guarantee the accuracy of the landing, the Tiangong-2 flight control team from CAST carried out repeated simulations and made a detailed flight control plan. During the deorbit, they monitored and adjusted the spacecraft's speed and angle constantly to maintain the best posture for reentry.

This represents the second time that China has deorbited a spacecraft under control. Tianzhou-1, China's first cargo spacecraft, adopted a "one-step" flight control strategy and reentered the Earth's atmosphere about five months after it was launched in April 2017.

Tiangong-2, however, took two steps -- first to be lowered to an elliptical orbit with the perigee at 200 km, and then further lowered to an elliptical orbit with a perigee at 70 km and reentered the atmosphere.

"We did not follow the established route, but instead forged a new path so as to collect more data during the process and learn more about the properties of different orbits," Zhu said.

Around Earth, there are more than 20,000 pieces of space debris larger than 10 centimeters, which are all deadly threats to operational spacecrafts. It will take the debris in low Earth orbit 400 km from our planet as long as 10 years to descend naturally and burn up in the atmosphere, and those in higher orbits even longer. Destruction by choice has become a common pursuit around the globe, although the deorbit technology remains a hard nut to crack.
The success of the controlled deorbit of Tiangong-2 will help promote the technology. Due to constant adjustments to its posture and speed, a spacecraft will consume a considerable amount of fuel when leaving its orbit. If a controlled deorbit scheme can be optimized to minimize the consumption of fuel, it will be of great use to clear out-of-service spacecrafts in medium and high Earth orbits. It is also of great significance to the development of economical, harmonious and green space undertakings, according to experts from CAST.

The flight control team will continue to study and dig through the data to search for better and safer deorbit strategies, they said.

tnt22

37 мин назад. Прощай, Тяньгун-2. Точка входа в атмосферу и место затопления.
Цитата China航天 
37分钟前

#再见了天宫二号# 天宫二号再入点、 瞄准点。



tnt22

19.07.2019 19:44:00 #490 Последнее редактирование: 19.07.2019 19:46:08 от tnt22
ЦитатаTiangong-2 space lab to reenter atmosphere on Friday evening

 CGTN

Опубликовано: 19 июл. 2019 г.
https://www.youtube.com/watch?v=KSc6FSt3eCwhttps://www.youtube.com/watch?v=KSc6FSt3eCw (0:39)

tnt22

ЦитатаChina's space lab Tiangong 2 reenters atmosphere under control

 CGTN

Опубликовано: 19 июл. 2019 г.
https://www.youtube.com/watch?v=ZRuktzMFua8https://www.youtube.com/watch?v=ZRuktzMFua8 (1:04)

tnt22

http://russian.news.cn/2019-07/20/c_138241561.htm
ЦитатаКитайская космическая лаборатория "Тяньгун-2" под контролем вернулась в атмосферу
2019-07-20 01:10:21丨Russian.News.Cn

Пекин, 19 июля /Синьхуа/ -- Китайская обитаемая космическая лаборатория "Тяньгун-2" /Небесный дворец-2/ сегодня около 19:06 по пекинскому времени под контролем вернулась в атмосферу Земли. Об этом сообщило Китайское агентство управления космическими полетами /CMSA/.

Небольшая часть обломков космического аппарата упала в заранее подготовленную безопасную зону в южной части Тихого океана.

Подконтрольное возращение Тяньгун-2 в атмосферу ознаменовало успешное завершение всех задач китайской пилотируемой космической программы на этапе космической лаборатории, сообщил Чжоу Цзяньпин, главный разработчик программы.

По словам CMSA, усилия направлены на ускорение подготовки к строительству китайской космической станции.

Тяньгун-2, улучшенная версия Тяньгун-1, считается первой космической лабораторией Китая. Она была запущена 15 сентября 2016 года и провела на орбите более 1 тыс дней, что намного больше ее двухлетнего проектного срока службы.

Состоящая из экспериментального и ресурсного модулей, космическая лаборатория имеет общую длину 10,4 м, максимальный диаметр которой составляет 3,35 м при взлетной массе 8,6 т. Размах крыльев при развернутых солнечных панелях достигает 18,4 м.

tnt22

Снят с сопровождения. R.I.P.

Цитата Jonathan McDowell‏ Подлинная учетная запись @planet4589 11 мин. назад
41765/Tiangong-2 is now noted as decayed (no longer in orbit)  in the US SATCAT.


tnt22

22.07.2019 06:22:56 #494 Последнее редактирование: 22.07.2019 06:24:56 от tnt22