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FoulBay

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МнениеПуснато на: Чет 11 Мар 2004, 21:29    Заглавие:  Космическия телескоп Хъбъл, открития и проблеми  

http://www.cnn.com/2004/TECH/space/03/10/cancel.hubble/index.html

Не всички са се примирили с пенсионирането
на космическия телескоп. Желая им успех!
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Fox Mulder


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МнениеПуснато на: Чет 22 Апр 2004, 22:06    Заглавие:  

Hubble ще го бъде, май. Rolling Eyes Rolling Eyes Rolling Eyes

Robotic Hubble Servicing Is Feasible, NASA Decides
By Jefferson Morris


NASA has decided that a robotic servicing mission to the Hubble Space Telescope (HST) is feasible and may decide to release a request for proposals (RFP) for such a mission by the fall, according to Associate Administrator for Space Science Ed Weiler.

NASA Administrator Sean O'Keefe sparked a controversy in January when he canceled the final planned space shuttle servicing mission to HST, saying it would violate the safety recommendations of the Columbia Accident Investigation Board (CAIB). Originally scheduled for 2005, the final servicing mission was to have replaced the telescope's crucial gyros and batteries and installed a new main camera and spectrograph.

Instead, NASA has been exploring other means of keeping the telescope operating for as long as possible, including robotic servicing. NASA's Goddard Space Flight Center in Greenbelt, Md., which operates the Hubble, released a request for information (RFI) about such a mission in February and received approximately 26 responses, according to Weiler.

"There look like there are some promising ideas on how we might be able to do a significant portion of a shuttle servicing mission without a shuttle, without astronauts, and thus taking the safety and risk issue off the table," Weiler said during a teleconference April 21.

Goddard is leading a NASA-wide team exploring the various robotic servicing options, and should have decided on a way forward by early June, Weiler said. If a mission should be approved, Goddard probably would manage it.

The most critical consumable on the Hubble is its onboard battery power. Without recharging or replacement, the batteries will run out by 2007 or 2008, rendering the telescope useless. Also crucial are Hubble's gyros, which allow for accurate pointing of its telescope.

Servicing priorities

The robotic servicing would involve a small spacecraft rendezvousing with Hubble and attaching itself to it. At the very least, the smaller spacecraft could be used to ensure that Hubble re-enters the atmosphere safely, according to Weiler.

In addition, "I think we're beginning to get pretty confident that the concept of batteries and gyros [being replaced or renewed] may be doable," Weiler said.

Schemes under consideration range from physically replacing the batteries to providing Hubble with an external power source that would reside in the smaller spacecraft. The servicing spacecraft might be able to feed power to Hubble through an umbilical attachment point on the telescope that has been used to secure it in the shuttle's payload bay during servicing missions, Weiler said. With its batteries recharged or replaced, Hubble probably could be kept operational until its orbit finally decays in 2013, he said.

More complex tasks, such as replacing the main camera, also are being considered, although NASA is being careful not to make the mission too ambitious and risk accidents that could render HST inoperative.

"Think of this nightmare scenario," Weiler said. "You put the instrument in for some reason, and you can't get the doors closed and you've got a light leak. Now all the instruments on Hubble are useless. That would be a bad day."

In part to satisfy the concerns of outspoken Hubble advocate Sen. Barbara Mikulski (D-Md.), NASA has asked the National Academy of Sciences (NAS) to offer its opinion on various options for extending Hubble's life. That response is expected in September.

Although it will seek input from the NAS along the way, NASA can't afford to wait for its response before beginning planning for the robotic servicing, Weiler said.

"We won't have to select and start funding contractors until after the Academy reports ... but we have to get the RFP ball rolling and proposals in to be evaluated so that when the academy report comes out, we will have the ability to take swift and determined action," Weiler said. "If we're going to do a robotic mission [in 2007-2008], we've got to get people under contract this fall."


http://www.aviationnow.com/avnow/news/channel_aerospacedaily_story.jsp?id=news/hub04224.xml

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МнениеПуснато на: Чет 22 Апр 2004, 22:53    Заглавие:  

Cool Cool Cool
Много ми е интересно кой ще е този роботизиран апарат който ще може да въстанови Хъбъл???

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MaKoM


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МнениеПуснато на: Пет 23 Апр 2004, 16:22    Заглавие:  

А какво е станало с Хабъл... Question Question Question Question
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МнениеПуснато на: Пет 23 Апр 2004, 16:25    Заглавие:  

Cool Cool Cool
Изоставиха го . НАСА няма да праща повече совалки за подръжката му.

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FoulBay

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МнениеПуснато на: Сря 28 Апр 2004, 19:13    Заглавие:  

Елемаг написа:
Cool Cool Cool
Много ми е интересно кой ще е този роботизиран апарат който ще може да въстанови Хъбъл???


Ето един проект

pdf-ът е по-малък от 3МБ. Нямам време да го чета
подробно, но четен по диагоналната система, изглежда
информативен.
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FoulBay

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МнениеПуснато на: Чет 29 Апр 2004, 11:51    Заглавие:  

и още за роботите

http://www.cnn.com/2004/TECH/space/04/27/hubble.repairsII/index.html
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МнениеПуснато на: Чет 29 Апр 2004, 16:26    Заглавие:  

Cool Cool Cool
Ако това стане ще бъде нов етап в строителството и подръжката в Космоса.

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МнениеПуснато на: Чет 29 Апр 2004, 16:31    Заглавие:  

Cool Cool Cool
Май има проблеми с гореспоменатата идея???

На недавних слушаниях в комитете Конгресса США по проекту бюджета NASA на 2005 год администратор NASA Шон О'Киф заявил, что ремонт космического телескопа Hubble с помощью робота является вполне осуществимым проектом.
По его словам, еще три недели назад он так не думал, но изменил свое мнение после того, как рассмотрел представленные в NASA предложения по проведению ремонта и модернизации телескопа Hubble без участия астронавтов.
Напомним, что идея отправки к телескопу Hubble космического аппарата с роботом возникла после того, как было решено отменить из соображений безопасности запланированную ранее экспедицию "шаттла", экипаж которого должен был провести ремонт некоторых систем телескопа и установить на нем новое оборудование. А в феврале этого года директор NASA по науке Эд Уэйлер (Ed Weiler) заявил, что при современном развитии робототехники и космических технологий, такой ремонт не представляется возможным.
Может быть, Уэйлер тоже теперь изменил свое мнение. Как заявил O'Киф, некоторые из представленных предложений предполагают использование для работ на космическом телескопе уже имеющихся систем и оборудования. Во всяком случае, по его словам, сейчас все это выглядит вполне осуществимым, и, судя по всему, ничего принципиально нового разрабатывать не придется.
O'Киф уточнил, что сейчас NASA подробно рассматривает два или три проекта продления срока службы телескопа Hubble и даже оснащение его новыми приборами с помощью робота. Самый перспективный проект планируется выбрать к июню, а до конца лета - проверить его осуществимость во всех деталях.
В числе предложенных проектов O'Киф упомянул робот Robonaut, предложенный Космическим центром им. Джонсона агентства NASA, и робот Ranger из Лаборатории космических систем Университета штата Мэриленд. Robonaut - это робот-гуманоид, который должен по идее выполнять те же работы, что и астронавт во время выхода в открытый космос. О похожести на человека робота Ranger ничего сказано не было, известно только, что он оснащен несколькими манипуляторами и уже проходит испытания на предмет способности выполнения работ, которые предстоит провести на телескопе Hubble.
Правда, O'Киф не сказал, находятся ли роботы Robonaut и Ranger в списке самых перспективных проектов.
Напомним также, что без проведения ремонта телескоп Hubble сможет проработать только до 2007 или максимум 2008 года.
[Текст: Е. Волынкина]

http://www.rol.ru

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Fox Mulder


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МнениеПуснато на: Пон 03 Май 2004, 23:13    Заглавие:  

Дано се получи всичко.

Save Hubble now

NASA should take two steps to extend the life of the Hubble telescope. First, Hubble needs servicing to stay in orbit past 2005. Second, Hubble should get new instruments, including some from the University of Colorado, to propel science into a new era.

To do so, NASA must make decisions this summer, or there won't be time for engineering work and astronaut training. There's support in Congress: U.S. Rep. Mark Udall, D-Colo., has more than 60 co-sponsors for a resolution to save Hubble.

Hammered by scientists' outcry against abandoning Hubble, NASA Administrator Sean O'Keefe now says robots may be able to service the telescope. But robots likely aren't sophisticated enough to install new instruments, engineers say, so truly saving Hubble may require a human touch.

O'Keefe has come under fire, too, for saying that concern for the shuttle crew's safety motivated his decision to desert Hubble. Some experts say sending the shuttle to the international space station is riskier than flying to Hubble. The number of flights needed to finish the station under O'Keefe's proposal is more ambitious than any schedule the shuttle has ever undertaken.

Critics say O'Keefe is really sacrificing Hubble to finance human missions to the moon and Mars.

Members of Congress don't automatically dislike planetary exploration, they just don't know if it's doable right now - especially since NASA is seeking a 5.6 percent budget boost in a year when most domestic programs will be lucky to see a half-percent increase.

Last week, some members of the House Appropriations Committee took O'Keefe to task for asking them to rubber-stamp a 15-year, radical change in NASA's mission without giving them a chance to analyze the concepts. They pointedly reminded him that Congress, not the bureaucracy, sets policy.

NASA should heed Congress and save and update Hubble. Then it should present Congress with coherent ideas for the agency's future. For an experienced Washington hand, O'Keefe certainly is acting like a bureaucrat without a plan.

http://www.denverpost.com/Stories/0,1413,36~417~2123172,00.html

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Fox Mulder


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МнениеПуснато на: Пет 07 Май 2004, 01:10    Заглавие:  

Одисеята продължава мамка му. Дано намерят начин да спасят телескопа. Напрактика на земята /въпреки наличнието на по-мощи телескопи/ няма телескоп, който да съперничи на Хъбъл.

Hubble rescue saga recounted
Chief scientist tells inside story behind decision
to cancel shuttle visit and consider robo-repair

By Robert Roy Britt
Senior Space Writer

Updated: 9:54 p.m. ET May 04, 2004BALTIMORE - An astronomer-astronaut who has journeyed twice to work on the Hubble Space Telescope said Monday that NASA Administrator Sean O'Keefe is conceptually sold on the idea of a robotic servicing mission.

Former astronaut John Grunsfeld, now NASA's chief scientist, also provided new details for how the possible reprieve came about. He discussed the pros and cons of robotic vs. astronaut servicing and ticked off a priority list for any robotic effort.

Hubble has just two or three years of observing left in its batteries and pointing gyroscopes. A decision on a possible mission is expected by early June.

While astronomers and the public have spent the past three months bemoaning O'Keefe's unilateral decision not to send a space shuttle back to repair and upgrade the orbiting observatory, Grunsfeld was contemplating alternatives. He has personally grappled with installation of new Hubble equipment during daring spacewalks.

O'Keefe told lawmakers on April 21 that the robotic mission looked promising. based on 26 responses to a call for ideas.

A robot can definitely do the work, Grunsfeld said. But if the telescope is to be saved, a final commitment must be made soon to allow time to plan a mission unlike any ever undertaken.

Lobbying the chief
NASA announced Jan. 16 that a crewed mission to fix Hubble and add new and powerful instruments would be canceled due to safety concerns presented in the wake of the Columbia shuttle disaster.

"The decision hit me in the head like a 2-by-4," Grunsfeld told astronomers gathered here at the Space Telescope Science Institute to ponder how to make the best use of Hubble's final years. After a couple weeks of depression over O'Keefe's initial decision, Grunsfeld was commiserating with a NASA engineer and learned that robotic servicing might be practical.

So he took the idea straight to the top.

Grunsfeld and Ed Weiler, NASA associate administrator for space science, put the suggestion to O'Keefe. They argued that the technology needed to carry out space-based robotic repair fit neatly with the requirements of President Bush's new vision of developing robotics and other capabilities necessary for setting up a moon base and sending astronauts to Mars. That means it would fit logically within the space agency's budget, which Bush wants restructured to support the new long-term goals.

"Mr. O'Keefe was totally sold," Grunsfeld said. "This took about five minutes."

Already, Grunsfeld said, equipment used by astronauts to train for past Hubble servicing missions has been shipped to NASA's Goddard Space Flight Center and two other locations where space-based robotics are under development for other purposes.

No decision has been made on how ambitious the mission might be, should O'Keefe approve it.

Coming to grips with loss
Astronomers had just been coming to grips with the expected loss of Hubble. Several of them reiterated at the meeting, a four-day discussion about which observing projects Hubble should undertake in an abbreviated life, why Hubble is so vital to investigating star and galaxy formation, exploring extrasolar planets and peeking at the earliest epochs of the cosmos.

No observatory seriously planned for launch anytime in the next 10 years can replace the optical and ultraviolet capabilities of Hubble, they said.

"The technology seems to be farther along than I had realized when the idea first came up" for a robotic fix-it venture, said David Leckrone of Goddard.

Robots vs. astronauts
"I don't care how we service Hubble" as long as science continues to flow from it, said Grunsfeld, who is trained as an astrophysicist.

It has not yet been determined whether there is enough time to plan for having robots successfully install new instruments that are already built and were intended to make Hubble more sensitive and useful than ever, or if the mission would instead be limited to keeping Hubble functioning at its present ability.

But Grunsfeld said employees at various NASA field centers "are just supercharged" to try and make it all happen.

In an interview, Grunsfeld said there's a clear priority list. The first would be to attach a device of some sort that would ultimately be used to deorbit Hubble into the ocean. That part of the mission would fulfill a requirement that had already been in place to safely bring Hubble down sometime in the next decade or so.

The second priority: "Don't break the Hubble," he said, on the assumption that it is still operating when the robot arrives.

Third would be to replace the batteries, which are likely to go before the gyroscopes, according to the latest analysis. Replacing the gyroscopes is a close fourth on the list.

New batteries and gyroscopes would buy about six years of service from the installation date.

There is a mechanical issue that could work to the favor of astronomers: Gyroscopes might be attached to the outside of the observatory, but that would be less than ideal due to problems of stability. A more stable option would be to mount them inside one of the new instruments and install the whole setup, achieving longer life and much better science, Grunsfeld said.

There are pros and cons to using astronauts vs. robots. From experience, Grunsfeld said equipment sometimes gets stuck while being swapped out. Astronauts can feel what's going on, stop, and make adjustments. On the other hand, "robots can do really pure motions." And a robot can remember the exact movements needed to remove a part, then duplicate the motion in reverse to install a replacement.

The process would not be automated. Instead, servicing Hubble would be a bit like an orbital video game.

Grunsfeld explained that the robot would be controlled from the ground, in real time, by someone familiar with the telescope — perhaps a former Hubble-servicing astronaut like himself. He added that even if a robotic mission did not fully succeed, engineers would learn plenty to apply toward future efforts at remote operations on the Moon and Mars.

"So it's a win-win situation," he said.

Fresh optimism
Astronomers who have felt left out of the decision to cancel the manned servicing mission were delighted to hear the upbeat report on the possible stay of execution for Hubble.

"NASA clearly feels the need to do something," said Steven Beckwith, director of the Space Telescope Science Institute, which operates Hubble for NASA. Beckwith and his staff were shocked when NASA decided not to send astronauts back to Hubble. He has since been pleased with "an outpouring of public support" for the telescope that he called unprecedented in the world of science.

This week's meeting, the 18th such spring gathering at the STScI, was planned prior to O'Keefe's January announcement. Its title, "Essential Science in Hubble's Final Years," turned out to be far more prescient than its planners expected.

Grunsfeld was not on the speaker's list handed out to conference attendees. The astronaut said O'Keefe had wanted to come, "to look all of you in the eyes" and explain the earlier decision not to return to Hubble. But the NASA chief was unavailable, having been called to speak before a Bush commission designed to set a course for meeting the new human spaceflight goals.

Astronomers have been concerned that O'Keefe's decision was not just about safety but was made to help shift the agency's course from science to human exploration. Not for the first time, Grunsfeld said that's not true.

"I got a very clear statement [from O'Keefe] that it was not about the budget," Grunsfeld said.

The decision did reflect the requirements of the Columbia Accident Investigation Board that reviewed last year's shuttle disaster and set guidelines for NASA's return to flight. It also included an extra measure of safety, based partly on what Grunsfeld called O'Keefe's intuition that NASA should have a second shuttle ready to fly a rescue mission in the event the crew of the servicing mission found itself in a faulty shuttle.

Grunsfeld said time was of the essence in the original decision, too. Even if the first shuttle flight occurs next spring, as tentatively planned now, it would be unrealistic to expect that after a few test flights — in which problems might be discovered, causing further delays — Hubble could be serviced before its batteries or gyros fail. He said a human journey to Hubble would be at least fifth on the return-to-flight priority list, behind shakeout flights and at least one trip to the international space station.

Best bet?

Grunsfeld said a robotic mission is, after considering all the factors, the more likely to be pulled off in time. "If we need to do something, we need to do it fast," he said.

Beckwith, the Space Telescope Science Institute's director, cautiously agreed that a robotic mission might turn out to be the best bet. But he said he would press for more than just the installation of batteries and gyroscopes. One of the reasons Hubble is such a great observatory, he said, is that previous missions have added new capabilities. One of the two planned new instruments for Hubble would make it 10 times more capable at infrared observations, other researchers have said.

"We don't know yet what robotic servicing means," Beckwith told his staff. "We should be optimistic."

© 2004 Space.com. All rights reserved. More from Space.com.

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МнениеПуснато на: Пет 07 Май 2004, 14:20    Заглавие:  

Cool Cool Cool
Единствения вариант е нов телескоп.

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Елемаг написа:
Cool Cool Cool
Единствения вариант е нов телескоп.


А пари от къде?

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МнениеПуснато на: Съб 08 Май 2004, 17:59    Заглавие:  

Cool Cool Cool
От раздутия военен бюджет разбира си.

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Да бъдеш добър е лесно. Трудно е да бъдеш справедлив!
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Регистриран на: 20 Фев 2004
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МнениеПуснато на: Съб 08 Май 2004, 23:29    Заглавие:  

Fox Mulder написа:
Елемаг написа:
Cool Cool Cool
Единствения вариант е нов телескоп.


А пари от къде?


Нов телескоп е предвиден, James Webb Telescope
http://ngst.gsfc.nasa.gov/
с огледало, по-голямо от това на Хъбъл:
http://www.coseti.org/9008-065.htm
Лошото е, че ще бъде качен горе през 2011, и то ако нещата
са по план. Освен това, той ще покрива друга част от
спектъра. Последното го знам от usenet, например
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&frame=right&rnum=41&thl=973099766,972948719,972926019,972892914,977567568,977447749,976082256,976244722,976076874,975745672,974906397,974829664&seekm=CTbTb.35248%24F15.9122%40fed1read06#link49
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