JWST – Ariane 5 ECA – Kourou ELA-3 – 25.12.2021 12:20 UTC

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tnt22

https://www.nasa.gov/feature/goddard/2019/nasa-s-james-webb-space-telescope-has-been-assembled-for-the-first-time
Цитировать

Aug. 28, 2019

NASA's James Webb Space Telescope Has Been Assembled for the First Time

Reaching a major milestone, engineers have successfully connected the two halves of NASA's James Webb Space Telescope for the first time at Northrop Grumman's facilities in Redondo Beach, California. Once it reaches space, NASA's most powerful and complex space telescope will explore the cosmos using infrared light, from planets and moons within our solar system to the most ancient and distant galaxies.


The fully assembled James Webb Space Telescope with its sunshield and unitized pallet structures (UPSs) that fold up around the telescope for launch, are seen partially deployed to an open configuration to enable telescope installation.
Credits: NASA/Chris Gunn

To combine both halves of Webb, engineers carefully lifted the Webb telescope (which includes the mirrors and science instruments) above the already-combined sunshield and spacecraft using a crane. Team members slowly guided the telescope into place, ensuring that all primary points of contact were perfectly aligned and seated properly. The observatory has been mechanically connected; next steps will be to electrically connect the halves, and then test the electrical connections.

"The assembly of the telescope and its scientific instruments, sunshield and the spacecraft into one observatory represents an incredible achievement by the entire Webb team," said Bill Ochs, Webb project manager for NASA Goddard Space Flight Center in Greenbelt, Maryland.  "This milestone symbolizes the efforts of thousands of dedicated individuals for over more than 20 years across NASA, the European Space Agency, the Canadian Space Agency, Northrop Grumman, and the rest of our industrial and academic partners."


Integration teams carefully guide Webb's suspended telescope section into place above its Spacecraft Element just prior to integration.
Credits: NASA/Chris Gunn


NASA's James Webb Space Telescope, post-integration, inside Northrop Grumman's cleanroom facilities in Redondo Beach, California.
Credits: NASA/Chris Gunn

Next up for Webb testing, engineers will fully deploy the intricate five-layer sunshield, which is designed to keep Webb's mirrors and scientific instruments cold by blocking infrared light from the Earth, Moon and Sun. The ability of the sunshield to deploy to its correct shape is critical to mission success.

"This is an exciting time to now see all Webb's parts finally joined together into a single observatory for the very first time," said Gregory Robinson, the Webb program director at NASA Headquarters in Washington, D.C. "The engineering team has accomplished a huge step forward and soon we will be able to see incredible new views of our amazing universe."

Both of the telescope's major components have been tested individually through all of the environments they would encounter during a rocket ride and orbiting mission a million miles away from Earth. Now that Webb is a fully assembled observatory, it will go through additional environmental and deployment testing to ensure mission success. The spacecraft is scheduled to launch in 2021.

Webb will be the world's premier space science observatory. It will solve mysteries in our solar system, look beyond to distant worlds around other stars, and probe the mysterious structures and origins of our universe and our place in it. Webb is an international project led by NASA with its partners, ESA (European Space Agency), and the Canadian Space Agency.

By Thaddeus Cesari
NASA's Goddard Space Flight Center

Last Updated: Aug. 28, 2019
Editor: Lynn Jenner

tnt22

ЦитироватьWebb Mirror Coating B-roll Footage

 James Webb Space Telescope (JWST)

25 сент. 2019 г.

Each of James Webb Space Telescope's mirrors is made of beryllium and coated with a very thin layer of gold to improve the mirror's ability to reflect infrared light. This b-roll footage shows the coating process.

Credit: NASA's Goddard Space Flight Center
https://www.youtube.com/watch?v=e1vyd86zdPMhttps://www.youtube.com/embed/e1vyd86zdPM (5:22)

tnt22

ЦитироватьTime-lapse: Webb Telescope Element Folded and Prepped for Shipping to NASA Johnson

 James Webb Space Telescope (JWST)

25 сент. 2019 г.

Time lapse video of engineers in NASA's Goddard Space Flight Center clean room folding and placing NASA's James Webb Space Telescope optical and instrument element into its shipping container, called the Space Telescope Transporter for Air Road and Sea (STTARS). This video is from May, 2017.

Credit: NASA's Goddard Space Flight Center
https://www.youtube.com/watch?v=JwCmxVCbKlkhttps://www.youtube.com/embed/JwCmxVCbKlk (4:52)

tnt22

ЦитироватьTimelapse: Webb Telescope Unloaded from STTARS at NASA's Johnson Space Center

 James Webb Space Telescope (JWST)

25 сент. 2019 г.

Time lapse video of the James Webb Space Telescope's optics and instrument segment (OTIS) being unpacked in the Chamber A clean room at NASA's Johnson Space Center in Houston.

Credit: NASA's Goddard Space Flight Center
https://www.youtube.com/watch?v=jjsYI9E8SCQhttps://www.youtube.com/embed/jjsYI9E8SCQ (1:04)

tnt22

ЦитироватьTimelapse: Webb Telescope Unloaded from STTARS at NASA's Johnson Space Center

 James Webb Space Telescope (JWST)

25 сент. 2019 г.

B-roll footage of the James Webb Space Telescope's optics and instrument segment (OTIS) being transported from NASA's Goddard Space Flight Center in Maryland to NASA's Johnson Space Center in Houston for cryogenic testing at the center's famous Chamber A. This footage is from May, 2017. The edited feature is here: https://youtu.be/UFiqiN-mxw4

Credit: NASA's Goddard Space Flight Center
https://www.youtube.com/watch?v=ytMVy4AEXyshttps://www.youtube.com/embed/ytMVy4AEXys (3:32)

ZOOR

Цитироватьtnt22 написал:
https://www.youtube.com/watch?v=ytMVy4AEXys

Внушает, как аккуратно не показали, каким самолетом перевозили  ;)
Я зуб даю за то что в первом пуске Ангары с Восточного полетит ГВМ Пингвина. © Старый
Если болит сердце за народные деньги - можно пойти в депутаты. © Neru - Старому

Плейшнер

ЦитироватьZOOR написал:
 
Цитироватьtnt22 написал:
 https://www.youtube.com/watch?v=ytMVy4AEXys

Внушает, как аккуратно  не показали , каким самолетом перевозили  
С-5 он и есть С-5
Не надо греть кислород!
Я не против многоразовых ракет, я за одноразовые!

tnt22

ЦитироватьLandmark Achieved as NASA's Webb Telescope Comes Together

 NASA Goddard

9 окт. 2019 г.

The most powerful and complex space science telescope ever created by humankind is one step closer to launch. As seen in a new video, NASA's James Webb Space Telescope recently reached a key milestone after its two halves were mechanically and electronically connected at Northrop Grumman's facilities in Redondo Beach, California.
https://www.youtube.com/watch?v=a0hyeOH9TiEhttps://www.youtube.com/embed/a0hyeOH9TiE (1:00)

tnt22

https://news.northropgrumman.com/news/releases/nasas-james-webb-space-telescope-achieves-milestone-of-successfully-withstanding-launch-stresses
ЦитироватьNASA's James Webb Space Telescope Achieves Milestone of Successfully Withstanding Launch Stresses

October 21, 2019

REDONDO BEACH, Calif. – Oct. 21, 2019 – At Northrop Grumman Corporation (NYSE: NOC) in Redondo Beach, NASA's James Webb Space Telescope successfully validated its ability to perform key deployments for the first time since its post environmental testing of the Spacecraft Element (SCE) and integration of the SCE and Optical Telescope Element/Integrated Science Instrument Module (OTIS).


A view of NASA's James Webb Space Telescope five-layer sunshield deployment at Northrop Grumman in Redondo Beach, California.

"The Northrop Grumman and NASA team has further validated that the James Webb Space Telescope can communicate and deploy as we have rehearsed in simulations, after launch," said Scott Willoughby, vice president and program manager, James Webb Space Telescope, Northrop Grumman. "This milestone has given us an unprecedented and breathtaking view of the near-fully deployed observatory. I am looking forward to the team's continued achievements as we march down our path towards launch and mission success."

A series of post-test check outs and deployments were conducted, including exercising the deployable tower assembly (DTA) and the five-layer sunshield, amongst others. The DTA is a critical structure that stows the OTIS to fit into the rocket fairing. When deployed, the DTA separates the OTIS four feet from the SCE, providing thermal separation and room to release the sunshield membrane covers. During these tests, Webb's five-layer sunshield was released and tensioned, allowing a never-before seen view of the observatory. A series of discrete deployments gave the sunshield its tennis-court sized length: the unitized pallet structures were released, the nested mid-booms extended and 90 cables were tensioned to deploy all five layers of sunshield membranes.

The fully assembled observatory will complete the final steps of post-integration testing in preparation for its observatory level acoustic and sine vibration environmental testing next year.

The James Webb Space Telescope will be the world's premier space science observatory when it launches in 2021. Webb will solve mysteries in our solar system, look beyond to distant worlds around other stars, and probe the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency.

Northrop Grumman is a leading global security company providing innovative systems, products and solutions in autonomous systems, cyber, C4ISR, space, strike, and logistics and modernization to customers worldwide. Please visit news.northropgrumman.com and follow us on Twitter, @NGCNews, for more information.

tnt22

ЦитироватьJWST Deployment Sequence

 Northrop Grumman

1 апр. 2014 г.

The James Webb Space Telescope is the world's next-generation space observatory and successor to the Hubble Space Telescope. The most powerful space telescope ever built, the Webb Telescope will observe the most distant objects in the universe, provide images of the first galaxies formed and see unexplored planets around distant stars.
https://www.youtube.com/watch?v=dlJtO7EbK-Uhttps://www.youtube.com/embed/dlJtO7EbK-U (5:18)

tnt22

https://www.nasa.gov/feature/goddard/2019/nasa-s-james-webb-space-telescope-clears-critical-sunshield-deployment-testing
ЦитироватьOct. 21, 2019

NASA's James Webb Space Telescope Clears Critical Sunshield Deployment Testing

The sunshield for NASA's James Webb Space Telescope has passed a test critical to preparing the observatory for its 2021 launch. Technicians and engineers fully deployed and tensioned each of the sunshield's five layers, successfully putting the sunshield into the same position it will be in a million miles from Earth.


After successfully assembling the entire observatory, technicians and engineers moved on to fully deploy and tension all five layers of its tennis court sized sunshield, which is designed to keep its optics and sensors in the shade and away from interference.
Credits: NASA/Chris Gunn

"This was the first time that the sunshield has been deployed and tensioned by the spacecraft electronics and with the telescope present above it. The deployment is visually stunning as a result, and it was challenging to accomplish," said James Cooper, NASA's Webb Telescope Sunshield Manager at NASA's Goddard Space Flight Center, Greenbelt, Maryland.


Each layer of NASA Webb's Kapton sunshield are uniquely sized, shaped, and have special rip-stop patterning to add durability to the membranes that are as thin as a human hair.
Credits: Northrop Grumman

To observe distant parts of the universe humans have never seen before, the Webb observatory is equipped with an arsenal of revolutionary technologies, making it the most sophisticated and complex space science telescope ever created. Among the most challenging of these technologies is the five-layer sunshield, designed to protect the observatory's mirrors and scientific instruments from light and heat, primarily from the Sun.

As a telescope optimized for infrared light, it is imperative that Webb's optics and sensors remain extremely cold, and its sunshield is key for regulating temperature. Webb requires a successful sunshield deployment on orbit to meet its science goals.

The sunshield separates the observatory into a warm side that always faces the Sun (thermal models show the maximum temperature of the outermost layer is 383 Kelvin or approximately 230 degrees Fahrenheit), and a cold side that always faces deep space (with the coldest layer having a modeled minimum temp of 36 Kelvin, or around minus 394 degrees Fahrenheit). The oxygen present in Earth's atmosphere would freeze solid at the temperatures experienced on the cold side of the sunshield, and an egg could easily be boiled with the heat encountered on the warm end.

Webb has passed other deployment tests during its development. Equally as important were the successful disposition of issues uncovered by those earlier deployments and the spacecraft element environmental testing. As before, technicians used gravity-offsetting pulleys and weights to simulate the zero-g environment it will experience in space. By carefully monitoring the deployment and tensioning of each individual layer, Webb technicians ensure that once on orbit, they will function flawlessly.

"This test showed that the sunshield system survived spacecraft element environmental testing, and taught us about the interfaces and interactions between the telescope and sunshield parts of the observatory," Cooper added. "Many thanks to all the engineers and technicians for their perseverance, focus and countless hours of effort to achieve this milestone."

The sunshield consists of five layers of a polymer material called Kapton. Each layer is coated with vapor-deposited aluminum, to reflect the Sun's heat into space. The two hottest sun-facing layers also have a "doped-silicon" (or treated silicon) coating to protect them from the Sun's intense ultraviolet radiation.

To collect light from some of the first stars and galaxies to have formed after the Big Bang, the telescope needed both the largest mirror ever to be launched into space, and the sunshield that has the wingspan of an entire tennis court. Because of the telescope's size, shape and thermal performance requirements, the sunshield must be both big and complex. But it also has to fit inside a standard 16-foot-(5-meter)-diameter rocket payload fairing, and also reliably deploy into a specific shape, while experiencing the absence of gravity, without error.

Following Webb's successful sunshield test, team members will begin the long process of perfectly folding the sunshield back into its stowed position for flight, which occupies a much smaller space than when it is fully deployed. Then, the observatory will be subjected to comprehensive electrical tests and one more set of mechanical tests that emulate the launch vibration environment, followed by one final deployment and stowing cycle on the ground, before its flight into space.

Webb will be the world's premier space science observatory. It will solve mysteries in our solar system, look beyond to distant worlds around other stars, and probe the mysterious structures and origins of our universe and our place in it. Webb is an international project led by NASA with its partners, ESA (European Space Agency) and the Canadian Space Agency.

By Thaddeus Cesari
NASA's Goddard Space Flight Center


Last Updated: Oct. 21, 2019
Editor: Lynn Jenner

tnt22

https://tass.ru/kosmos/7028604
Цитировать22 ОКТ, 08:15
На телескопе James Webb провели комплексное испытание узлов
Он должен заменить ориентировочно в 2021 году космическую обсерваторию Hubble

НЬЮ-ЙОРК, 22 октября. /Корр. ТАСС Игорь Борисенко/. Специалисты NASA и компании Northrop Grumman завершили в понедельник комплексное испытание научного и энергетического модулей космического телескопа James Webb. В частности, прошла проверку система раскрытия термоизоляции научного модуля, состоящей из пяти слоев.

Как сообщил по завершении испытаний вице-президент Northrop Grumman Скотт Уиллоугби, руководящий программой создания телескопа, "в ходе испытаний было подтверждено, что с телескопом можно будет поддерживать связь, и он будет развернут после вывода на орбиту так, как планировалось в ходе предварительных испытаний". "Достигнув нынешней стадии испытаний, мы получили потрясающую возможность увидеть телескоп в практически полностью развернутом виде", - добавил он.

Орбитальный телескоп, названный в честь Джеймса Уэбба, руководителя программы "Аполлон", позволившей человеку побывать на Луне, должен заменить ориентировочно в 2021 году космическую обсерваторию Hubble. Его предполагается вывести далеко за Луну в точку Лагранжа, находящуюся на расстоянии примерно 1,6 млн км от Земли.

На James Webb будет установлено зеркало диаметром 6,5 м, составленное из 18 секций. Каждая из них имеет форму равностороннего шестиугольника и весит около 40 кг. Для их изготовления был выбран бериллий - материал, устойчивый к сверхнизким температурам. Новый телескоп предназначен для изучения древнейших во Вселенной звезд и галактик, сформировавшихся после Большого взрыва, а также поиска потенциально пригодных для жизни планет.

tnt22

Цитировать Jeff Foust‏ @jeff_foust 15 мин. назад

At the NASA Astrophysics Advisory Committee meeting, Greg Robinson says JWST has 2 months of schedule reserve remaining for 3/21 launch. Should be okay as long as they only deal with minor problems, but it would be a "semi-bad day schedule-wise" if they encountered a big problem.

tnt22

https://www.arianespace.com/mission-update/james-webb-space-telescope-preps/
ЦитироватьAriane 5 | November 4, 2019
A milestone payload for Ariane 5: the James Webb Space Telescope is prepared for liftoff with Arianespace


Technicians and engineers work to fully deploy the James Webb Space Telescope's tennis court-sized sunshield at Northrop Grumman's Redondo Beach, California facilities. Credits: NASA/Chris Gunn

With multiple pre-flight milestones achieved in recent months, the James Webb Space Telescope (JWST) – which will succeed the Hubble Space Telescope – is on course for its historic launch by Arianespace on an Ariane 5.

As the world's premier space science observatory, the JWST will solve mysteries of the solar system, look for distant worlds, and probe the mysterious structures and origins of the universe. It is an international project led by the U.S. National Aeronautics and Space Administration (NASA) – along with its partners, the European Space Agency (ESA) and Canadian Space Agency (CSA).

Arianespace is performing the launch on behalf of ESA, within the agency's scope of its collaboration with NASA. The mission – currently planned for 2021 – underscores Arianespace's ability to serve institutional clients while also expanding humankind's knowledge of the universe to make life better on Earth.

After deployment by Ariane 5 fr om the Spaceport in French Guiana, the JWST will travel to near the second Lagrange point (L2) of the Earth-Sun system (1.5 million kilometers from Earth, directly opposite the Sun), wh ere the telescope will circle about the L2 point in a halo orbit.

Fully assembled for launch

Kicking off a series of launch preparation achievements, the two components comprising the JWST – the spacecraft and its telescope – were integrated for the first time in late August. This activity took place at the Redondo Beach, California facilities of U.S.-based Northrop Grumman, which leads the JWST industry team.

After the JWST was mechanically connected, engineers worked to electrically link up its two components – enabling them to "speak" to each other like they will in orbit. This optional risk reduction test, marked in late September, took advantage of an opportunity to electrically connect the two components months earlier than planned.

If any issues had been found during the evaluation, it would have given engineers more time to investigate and troubleshoot. In addition, this test provided a jumpstart for the separate spacecraft and telescope teams to begin working jointly as they will when the JWST is fully completed.

A milestone deployment

In October, the JWST passed a test critical to preparing the observatory for its 2021 Ariane 5 launch from French Guiana: deployment of its sunshield, which will protect the JWST's mirrors and scientific instruments from light and heat while in orbit.

Shaped like a kite and sized at 22 X 10 meters, the sunshield's five layers were fully deployed (and put under tension) during this continued activity at Redondo Beach, as engineers and technicians successfully put the sunshield into its operational position.

After the sunshield is returned to its stowed position for flight, the JWST will undergo comprehensive electrical tests, as well as a set of mechanical evaluations to simulate launch vibrations. There will be one final deployment and stowing cycle on the ground before its integration on Ariane 5.
    [/li]
  • A larger version of the photo above is available in the Gallery.

tnt22

Цитировать NASA Webb Telescope‏ @NASAWebb 1 ч. назад

(Human for scale.)

This photo showcases just how big #NASAWebb is! We'll be sharing more behind-the-scenes images captured during the integration of the spacecraft and telescope halves of the observatory in this thread.

Picture Credit: @northropgrumman




50 мин. назад

This photo from @northropgrumman shows the start of integration. The telescope is seen hanging from a crane, in the process of being moved over the sunshield.




41 мин. назад

A rare view from underneath #NASAWebb's iconic primary mirror, as it moves into position over its spacecraft during integration.




32 мин. назад

Almost there... The telescope is over the sunshield and ready to be lowered.




26 мин. назад

Success! The telescope and spacecraft halves of #NASAWebb are now one whole observatory.  Read more about this August 2019 milestone: https://go.nasa.gov/2znr2JV




16 мин. назад

"A telescope's sensitivity, or how much detail it can see, is directly related to the size of the mirror area that collects light from the objects being observed. A larger area collects more light, just like a larger bucket collects more water in a rain shower than a small one."




5 мин. назад

After the telescope and sunshield were joined, technicians did a careful inspection of the entire observatory, before moving on to electronically connect all of its various interfaces.


tnt22

ЦитироватьNASA's James Webb Space Telescope Clears Critical Sunshield Deployment Testing

 NASA Goddard

19 нояб. 2019 г.

In October 2019, technicians and engineers successfully performed a critical test on NASA's James Webb Space Telescope by fully deploying and properly tensioning each of its five uniquely sized sunshield layers, putting them into the same positions they will have in space. To observe distant parts of the universe humans have never seen before, the Webb observatory is equipped with an arsenal of revolutionary technologies, making it the most sophisticated and complex space science telescope ever created. Among the most challenging of these technologies is the five-layer sunshield, designed to protect the observatory's mirrors and scientific instruments from light and heat, primarily from the Sun. Due to the telescope's size, shape and thermal performance requirements, the sunshield must be both big and complex. As if that's not challenging enough, it also must be very lightweight, fit inside a standard 5-meter (16-foot) diameter rocket fairing, survive the perils of launch, and accurately deploy into its required shape, with only a single chance to get it right. Following Webb's successful sunshield test within Northrop Grumman's Redondo Beach, California facility, team members have begun the long process of perfectly folding the sunshield back into its stowed configuration for flight, which occupies a drastically smaller volume than when it is fully deployed.
https://www.youtube.com/watch?v=SyttX8x1OUkhttps://www.youtube.com/embed/SyttX8x1OUk (0:56)

tnt22

https://tass.ru/kosmos/7474703
Цитировать7 ЯНВ, 13:52
В США закончили основные работы по созданию телескопа James Webb
При этом аппаратура телескопа должна будет пройти испытания на устойчивость к вибрации и шуму при запуске ракетой-носителем Ariane 5

НЬЮ-ЙОРК, 7 января. /ТАСС/. Основные работы по созданию орбитального телескопа James Webb завершены, но на протяжении 15 месяцев, оставшихся до намеченной даты вывода его на орбиту, будет проведена еще серия наземных испытаний. Об этом сообщил интернет-портал Space.com со ссылкой на представителя Национального управления по аэронавтике и исследованию космического пространства (NASA) Эрика Смита.

"Мы только что практически завершили строительство орбитальной обсерватории, - сообщил он участникам совещания, организованного в штате Гавайи. - Таким образом, у нас есть телескоп James Webb, и нам предстоит убедиться в том, что он будет работать так, как запланировано".

По данным Space.com, в 2020 году аппаратура телескопа будет испытана на устойчивость к вибрации и к шуму при запуске ракетой-носителем Ariane 5, будет заменена часть электронной аппаратуры, нештатно сработавшей во время предыдущих испытаний, а затем будет еще одна проверка всех систем, чтобы оценить, как комплексные испытания повлияли на аппаратуру обсерватории, создание которой, по оценкам, обойдется почти в $10 млрд.

Орбитальный телескоп, названный в честь Джеймса Уэбба, руководителя программы "Аполлон", позволившей человеку побывать на Луне, должен заменить ориентировочно в 2021 году космическую обсерваторию Hubble. Его предполагается вывести в точку Лагранжа, находящуюся на расстоянии примерно 1,6 млн км от Земли.

На James Webb будет установлено зеркало диаметром 6,5 м, составленное из 18 секций. Каждая из них имеет форму равностороннего шестиугольника и весит около 40 кг. Для их изготовления был выбран бериллий - материал, устойчивый к сверхнизким температурам. Новый телескоп предназначен для изучения древнейших во Вселенной звезд и галактик, сформировавшихся после Большого взрыва, а также поиска потенциально пригодных для жизни планет.

tnt22

ЦитироватьAn Introduction to the James Webb Space Telescope Mission

 NASA Goddard

15 янв. 2020 г.

A look at the James Webb Space Telescope, its mission and the incredible technological challenge this mission presents.
https://www.youtube.com/watch?v=6VqG3Jazrfshttps://www.youtube.com/embed/6VqG3Jazrfs (3:43)

Просто Василий

А почему выбрали именно Ariane 5? Delta  Heavy видится надежнее 
Пока мы говорим, уходит завистливое время: лови момент, как можно меньше верь будущему.

Плейшнер

ЦитироватьВаська Кот написал:
А почему выбрали именно Ariane 5? Delta  Heavy видится надежнее  
Это сегодня может видится. А на момент, когда выбирали?  ;) 
Не надо греть кислород!
Я не против многоразовых ракет, я за одноразовые!