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[专题专项] 国际空间站ISS相关话题:Roscosmos和NASA开始讨论将ISS延期至2028年

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shaolin1254 发表于 2009-1-19 13:57 | 显示全部楼层
星辰上的发动机用什么燃料呀,液氢液氧?
liudao 发表于 2009-1-19 15:01 | 显示全部楼层
原帖由 shaolin1254 于 2009-1-19 13:57 发表
星辰上的发动机用什么燃料呀,液氢液氧?

有毒肼类燃料.
 楼主| jingyan66 发表于 2009-1-21 15:17 | 显示全部楼层

空间站进行“等离子体晶体”试验

科技日报    记者 聂云鹏

  新华社莫斯科1月19日电 俄罗斯地面飞行控制中心发言人伦金19日说,国际空间站长期考察组俄罗斯宇航员尤里•隆恰科夫从当天开始在站内进行为期一周的“等离子体晶体”试验。

  据俄塔社报道,在接下来的一周内,尤里•隆恰科夫要进行一系列的“等离子体晶体”科学试验,其结果将有助于科学家研制出供卫星使用的新型动力和一种“放射性物质除尘器”。伦金介绍说,在发生核事故泄漏时,这种设备能消除大气中放射性物质的危害。

  “等离子体晶体”试验项目负责人福尔多夫说,通过这些试验,科学家将加深对“等离子体晶体”的了解,从而进一步推动微电子学和动力学研究。

  国际空间站于2001年开始进行“等离子体晶体”试验。俄罗斯“和平”号空间站则早在1998年就曾进行过此类试验。
 楼主| jingyan66 发表于 2009-1-22 19:53 | 显示全部楼层
俄罗斯将取消太空游客业务

2009年01月22日    新华网

  新华网莫斯科1月21日电据俄罗斯媒体21日报道,俄罗斯联邦航天署署长佩尔米诺夫表示,由于国际空间站常驻宇航员人数今年将翻倍,俄计划2009年后将不再运送“太空游客”前往空间站。

  21日出版的《俄罗斯报》刊登的一篇采访佩尔米诺夫的报道说,已定于今年3月搭乘俄载人飞船游太空的美国亿万富翁查尔斯·西蒙尼将是最后一位“太空游客”。

  按照国际空间站的建设计划,今年驻站宇航员的数量将从目前的3人扩编到6人,以便参与空间站建设的加拿大、日本以及欧洲的宇航员都能有机会到空间站驻站。此前,空间站长期考察组人员主要来自美国和俄罗斯。

  俄罗斯的“联盟”号载人飞船和“进步”号货运飞船一直是空间站建设的重要交通工具,尤其2003年美国“哥伦比亚”号航天飞机失事后,美减少了航天飞机的飞行次数,主要依赖俄飞船“天地往返”。

  如今,美国已决定到2010年让现役航天飞机全部退役,在美国下一代载人航天器投入飞行之前,俄载人飞船将承担更重的飞行任务。

  自2001年以来,俄联邦航天署与美国太空冒险公司合作开展“太空游客”业务,个人可支付大约2000万至3000万美元费用,在俄运送宇航员的载人飞船上购得一席之地,前往空间站停留数天,然后返回地球。

  迄今,已有6人享受过这种“天价太空游”。最近一次是去年10月美国电脑游戏开发商理查德·加里奥特到空间站一游。而对于西蒙尼来说,3月的太空之旅将是他二度飞天,他曾于2007年4月作为第五名“太空游客”前往空间站。
 楼主| jingyan66 发表于 2009-1-28 13:41 | 显示全部楼层

俄计划向国际空间站增加发射3个舱

2009年01月28日   新华网

  新华网莫斯科1月27日电 (记者 聂云鹏) 俄罗斯中央机器制造研究所副所长科夫诺夫日前表示,如果国际空间站参与国家同意延长空间站的使用年限,俄罗斯将向国际空间站增加发射3个舱。

  据俄塔社报道,科夫诺夫26日在莫斯科举行的有关会议上表示,如果国际空间站参与国家一致决定将国际空间站的使用期限在2015年的基础上有所延长,俄罗斯计划向国际空间站俄罗斯舱段增加发射3个舱。他说,2012年俄罗斯将向空间站发射一个节点舱,2014年和2015年则分别发射一个能源舱。他表示,这些舱将大大提高空间站俄罗斯舱段的能源供给,推动俄罗斯科学试验项目的开展。

  科夫诺夫介绍说,按照事先制定的计划,俄罗斯将于今年向国际空间站发射一个小型试验舱,2010年4月向国际空间站发射可对接俄“联盟”载人飞船的试验舱,2011年发射重型多用途试验舱。据悉,试验舱将增加俄罗斯舱段科学试验的数量,同时还将提高国际空间站宇航员的生活舒适性,改善宇航员的出舱条件。

  国际空间站于1998年正式开始建设,其设计寿命可至2015年,包括俄罗斯在内的多个国家多次表示希望延长国际空间站的使用年限。俄联邦航天署署长佩尔米诺夫此前曾表示,有关国家将于今年年底前就延长国际空间站的使用年限作出最终决定。
hkhtg090201 发表于 2009-2-2 08:55 | 显示全部楼层
这么好的网址,为什么以前没有发现!?
 楼主| jingyan66 发表于 2009-2-4 15:26 | 显示全部楼层

俄飞行中心取消原定的国际空间站轨道调整

2009年02月04日   新华网  


    新华网莫斯科2月3日电(记者聂云鹏)俄罗斯飞行控制中心3日宣布,原定于2月4日进行的国际空间站轨道调整将被取消。

    俄塔社援引俄飞行控制中心的消息说,该中心原定于2月4日对国际空间站运行轨道进行调整,以便为俄罗斯货运飞船及美国航天飞机与空间站对接创造条件。但经过与美国宇航局空间站项目有关专家的详细讨论,该中心认为目前的国际空间站运行轨道适合航天器对接,没有必要再进行一次轨道调整,因此决定取消原定的轨道调整计划。

    俄飞行控制中心于1月14日对国际空间站运行轨道进行了今年的第一次调整,空间站运行轨道被提升了约5.3千米,最后到达距地球357.6千米的太空轨道。该中心此前曾表示,在2月初还将进行本年度第二次空间站轨道调整,这两次轨道调整将会为俄罗斯“进步M-66”货运飞船及美国“发现”号航天飞机接近空间站并与其对接创造最佳条件。

    按计划,“进步M-66”货运飞船及“发现”号航天飞机将分别于2月10日和12日发射升空。

    由于受地球引力影响,国际空间站运行轨道会以每天100米左右的速度下降,为保持空间站运行高度,保证与航天器的顺利对接,每年要对其进行3到4次轨道调整。
hkhtg090201 发表于 2009-2-27 21:43 | 显示全部楼层
NASA邀请网友为国际空间站一模块命名
  NASA推出了一次投票活动,邀请网友为国际空间站节点3(Node 3)模块命名。投票截止日期为3月20日,NASA将在4月宣布获选名字。网友有4个名字供选择,分别是Earthrise(地出),Legacy,Serenity(宁静),Venture(冒险),也可以提出自己的名字。到目前为止Serenity(宁静)拥有压倒性的优势,获得了超过80%的投票,也许这与科幻电视剧《萤火虫(Firefly)》有点关系——宁静号是该剧主角所驾驶的飞船。
根据NASA的介绍:国际空间站现有的两个节点名字分别是:Node 1—团结,Node 2—和谐。节点3模块将在2009年12月作为STS-130任务目标发射升空,它将连接团结模块,将为宇航员的生命支持系统提供更多空间,包括制氧系统(Oxygen Generation System),空气再生系统(Atmosphere Revitalization System),水循环和尿处理系统等在内的系统都将转移到节点3。

来自:
http://science.solidot.org/science/09/02/26/1425202.shtml
calendfans 发表于 2009-3-5 07:25 | 显示全部楼层
太空行走预告:
  3月10(星期2),码头口。

Station Crew Gearing Up for Spacewalk
March 4th, 2009

(NASA) - The residents of the International Space Station turned their attention Tuesday to spacewalk preparations as they gear up for a 5-hour, 20-minute excursion next week.

http://spacefellowship.com/News/?p=8351
 楼主| jingyan66 发表于 2009-3-9 08:47 | 显示全部楼层

国际空间站宇航员将于5月增至6人

2009年03月06日   新华网

  新华网莫斯科 3月5日电(记者 聂云鹏) 即将出发的国际空间站第19长期考察组指令长、俄罗斯宇航员根纳季·帕达尔卡5日说,国际空间站常驻宇航员将于5月增加到6人。

  据国际文传电讯社报道,俄罗斯部际委员会5日批准了国际空间站第19长期考察组成员名单,根纳季·帕达尔卡将担任国际空间站指令长。他当天在俄罗斯宇航员培训中心召开的新闻发布会上说,俄“联盟”系列载人飞船和美国“发现”号航天飞机将在近期相继抵达国际空间站,宇航员轮换后,空间站常驻宇航员人数将增加到6人。

  他介绍说,这6名宇航员分别来自俄罗斯、美国、日本、比利时和加拿大。来自3大洲5个国家的宇航员将同时在国际空间站内工作,这在空间站历史上尚属首次。

  根纳季·帕达尔卡说,虽然人数增加,但“国际空间站内人员的部署和安排不会有任何问题,我们将作为一个整体团队与地面密切配合并开展工作”。

  按计划,国际空间站第19长期考察组成员将于3月26日乘坐俄“联盟TMA-14”载人飞船奔赴国际空间站,5月俄“联盟TMA-15”载人飞船将运送另外3名宇航员抵达空间站。美国的“发现”号航天飞机目前暂定3月11日发射。
hkhtg090201 发表于 2009-3-11 14:49 | 显示全部楼层
国际空间站宇航员成功进行太空行走(图)http://www.sina.com.cn  2009年03月11日 09:06  新华网

宇航员在国际空间站执行太空行走任务。新华社/法新(资料图片)


  新华网莫斯科3月11日电(记者聂云鹏)俄罗斯地面飞行控制中心11日发布消息说,国际空间站两名宇航员当天成功完成近5个小时的太空行走,成功完成了站外实验设备的安装及空间站维护修理等任务。

  俄地面飞行控制中心发言人伦金说,参加太空行走的是空间站俄罗斯宇航员尤里·隆恰科夫和美国宇航员迈克·芬克,原计划出舱5小时45分,但他们提前完成作业,太空行走共持续4小时50分。

  据俄罗斯“能源”火箭航天集团科研中心主任卡列里介绍,两名宇航员首先在“星辰”号服务舱外成功安装代号为EXPOSE-R的欧洲实验设备。这一安装任务本应于去年年底完成,但当时由于实验设备出现技术故障,任务临时取消。

  据俄罗斯科学院医学-生物研究所实验室主任、国际空间站俄方试验项目主管诺维科娃介绍,有关人员在EXPOSE-R实验设备中放入了细菌、蘑菇、植物种子等生物,以研究有机生物在开放的太空环境下可能受到的影响,试验结果将有助于揭示地球生命起源和未来开展星际飞行。

  在这次太空行走中,两名宇航员还对空间站俄罗斯舱段进行了修理维护,并对其各部件拍照记录。
hkhtg090201 发表于 2009-3-11 15:57 | 显示全部楼层
国际空间站宇航员下次太空行走初定于今年6月  
2009年03月11日 11:15:01  来源:新华网  

    新华网莫斯科3月11日电(记者聂云鹏)俄罗斯“能源”火箭航天集团科研中心主任卡列里11日表示,国际空间站宇航员下次太空行走将于今年6月进行。

    国际空间站俄罗斯宇航员尤里·隆恰科夫和美国宇航员迈克·芬克11日完成了近5个小时的太空行走,成功完成了站外实验设备的安装及空间站维护修理等任务。

    据俄媒体报道,卡列里在俄地面飞行控制中心接受采访时表示,按计划,空间站宇航员下次太空行走将于今年6月进行。下次太空行走的主要任务是为俄小型试验舱与空间站“星辰”号服务舱对接做准备,为完成这一任务,宇航员需进行两次太空行走。

    卡列里说,11日太空行走过程中宇航员穿着“奥兰-M”舱外宇航服,而下次太空行走将使用新式智能化舱外宇航服“奥兰-MK”。

    卡列里还说,今年5月国际空间站常驻人员将增加到6人,国际空间站的发展将达到新水平。由于常驻人数增加,空间站人员紧急疏散计划也有所改变。届时,空间站将同时对接两艘“联盟”号救生飞船,只有在空间站发生泄漏或火灾等情况下宇航员才能弃站乘救生船逃生,而在发生其他意外情况下,空间站宇航员将在站内采取措施,消除危险。
 楼主| jingyan66 发表于 2009-3-12 08:50 | 显示全部楼层

经过十年的建设,国际空间站ISS接近完成

After 10 years, space station finally nears completion


The Space Shuttle Discovery will bring the last US-made piece to the space station when it launches Wednesday.

By Peter N. Spotts  |  Staff Writer for The Christian Science Monitor/ March 11, 2009 edition

A decade ago, the United States docked its first module, Destiny, to an embryonic International Space Station. Tonight, the space shuttle Discovery is set to launch an American segment that could be called “Finally!”

The last major US-built component – a 15.5-ton truss bearing the station’s last set of solar panels – is nestled snuggly in Discovery’s cargo bay, awaiting the orbiter’s launch, now scheduled for Thursday night after Wednesday’s planned launch was scrubbed due to a hydrogen gas leak.

Installing the final solar array is a critical step in preparing the station to hold its full complement of six crew members and run all the experiments the international partners have planned.

At least seven more shuttle missions remain to put the finishing touches on the international project before the shuttles are retired by the end of 2010. Still, this mission has a milestonelike feel to it, says Paul Dye, the shuttle mission’s lead flight controller.

“When we got started on this, it was a dream,” he says. Now, after watching it grow for more than 10 years, the prospect of seeing a virtually finished product “is just amazing,” he adds.

Thursday’s launch – which should be visible to people living along the US East Coast for about eight minutes after liftoff – was originally set for Feb. 12. But mission managers delayed the launch to deal with a problem that cropped up during the shuttle Endeavor’s mission to the space station in November.

During Endeavour’s launch Nov. 14, controllers noticed that the shuttle’s hydrogen fuel tank was returning odd pressure readings. After Endeavour and its crew returned, technicians found that a small piece of an important valve had broken off. The valve, about the size of a pop-up lawn sprinkler, is one of three that control the flow of hydrogen gas siphoned from the shuttle’s main engines and returned to the fuel tank to keep it pressurized.

Engineers traced the problem to metal fatigue. The concern: In certain scenarios, a broken piece of valve could lead either to the main engines shutting down prematurely or to the main fuel tank exploding. So managers opted to replace similar, heavily used flow-control valves on Discovery with newer ones.

The hydrogen gas leak discovered Wednesday was traced to the fuel lines outside the shuttle and is unrelated to valves, NASA officials said.

Discovery’s seven-member crew faces a full schedule during the 15-day mission, with a half-day break on the mission’s 10th day. The activities include four spacewalks. Besides installing the final set of solar panels – which carried a price tag of $289 million – spacwalking astronauts are slated to perform a variety of maintenance tasks. Inside, astronauts will replace a balky waste-water distillation unit. The device is designed to convert wastewater into drinking water.

Once it is fixed, the unit will eliminate the need to bring water from Earth, increasing the amount of other supplies cargo craft can carry. Astronaut-plumbers also will try to flush the station’s drinking-water dispenser, which has been offering water with bacteria counts that are too high for NASA’s liking.

Troubleshooting aside, Discovery’s mission also has an “old home week” feel for two members of the orbiter’s crew.
Mission specialist John Phillips, for instance, has spent time on Russia’s space station, Mir. He also served as flight engineer on the International Space Station for 179 days in 2005. In all, this will mark his third trip to the International Space Station.

“This is going to be different for me,” he acknowledges. “It’s going to be a mixture of a little nostalgia to see the little compartment that I lived in for six months. The little kitchen in the Russian module hasn’t changed. But it’s also going to be really cool to see the bright shiny new modules. I’m looking forward to seeing the whole thing.”

For Koichi Wakata, a Japan Aerospace Exploration Agency astronaut who will remain as a member of the station’s crew when Discovery departs, the contrast between his first mission to the station in 2000 and this mission is even more stark.

“We delivered the first truss to the International Space Station,” he recalls. At the time, no one was living aboard the station. “It was so small. It was a little bigger than my apartment in Tokyo.”

Now, the 305-ton orbiting outpost boasts a solar-panel wingspan of a Boeing 747 airliner and some 13,000 cubic feet of shirt-sleeve living and working space.

“It will be very interesting to see this expanded International Space Station,” he says.
cmj9808 发表于 2009-3-12 10:51 | 显示全部楼层
本帖最后由 cmj9808 于 2009-3-12 10:54 编辑

NASA在ISS的两项研究解释了沙门氏菌(Salmonella)的致病机制。研究表明,沙门氏菌在微重力环境下致病力增强,这一现象或许可以用“fluid shear”来解释,即当细菌感受到周围液体运动减缓(low fluid shear)时,比如在微重力下或者在人的肠道中,其毒性会显著增强。微重力被用来模拟人肠道中的情况。进一步研究表明改变培养环境中的离子强度可以显著减弱沙门氏菌的致病能力。这一研究开创了一个新的领域,即利用微重力环境研究“fluid shear”对微生物致病过程的影响,相关成果发表在PNAS和PLoS ONE上。


HOUSTON -- Salmonella bacteria research from two recent NASA space missions discovered key elements of the bacteria's disease-causing potential that hold promise for improving ways to fight food-borne infections on Earth.
Salmonella is a leading cause of food poisoning and related illnesses. According to the Centers for Disease Control and Prevention, approximately 40,000 cases of Salmonella infections are reported in the United States each year.
"This research opens up new areas for investigations that may improve food treatment, develop new therapies and vaccines to combat food poisoning in humans here on Earth, and protect astronauts on orbit from infectious disease," said Julie Robinson, program scientist for the International Space Station at NASA's Johnson Space Center in Houston.
hkhtg090201 发表于 2009-3-12 18:41 | 显示全部楼层
本帖最后由 hkhtg090201 于 2009-3-13 10:11 编辑

美国宇航局:将网播国际空间站外捕捉的实时画面
  2009年03月12日 09:30   来源:中国经济网综合
..  据国外媒体报道,美国宇航局将网播国际空间站外部摄像头捕捉的实时画面,不过这仅限于宇航员业余或者睡眠时间。

    美国宇航局说,地面和空间站有四个信道传输数据,在宇航员醒了之后或者开始工作时,宇航局需要这些信道用于工作,因此此时无法网播空间站外画面。

    另外,网民只能看到空间站外部摄像头的实时画面。美国宇航局说,他们不想将空间站内宇航员的隐私暴露在全世界面前。宇航局发言人称:“(如果开放内部摄像头)就会成为‘大兄弟’真人秀节目。”

    通过网播画面,网民有望看到地球或者星空的场景,如果空间站在地球上空225英里轨道,网民可以看到空间站的外部结构。
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追踪(2009-03-13):取消直播。
ISS partners rule out turning life on orbiter into reality showMarch 12th, 2009
MOSCOW, (RIA Novosti) - Roscosmos and NASA have decided not to pursue a U.S.-initiated idea to make life on the International Space Station (ISS) a reality show, the Russian Space Agency announced on Thursday.


.. ..
http://spacefellowship.com/News/?p=8418
hkhtg090201 发表于 2009-3-12 23:53 | 显示全部楼层
真的?假的?
红色极限..空间站乘员可能撤离..碎片威胁..

http://www.nasaspaceflight.com/2009/03/threat-to-iss-crew-soyuz/


RED threshold late notice conjunction threat to ISS - Crew may move to Soyuz
March 12th, 2009 by Chris Bergin  

The three members of Expedition 18 are being prepared for the contingency of  “evacuation” into the Soyuz spacecraft attached to the International Space Station (ISS), following a “RED threshold late notice conjunction threat” alert, related to Object “25090 PAM-D” debris.


Tracking of the small piece of debris/MMOD (Micrometeoroid Orbital Debris) was initially classed as a low threat of collision with the ISS. However, latest tracking suggests the threat is red.

As a contingency, NASA’s Expedition 18 Commander Mike Fincke, Russian Flight Engineer Yury Lonchakov, and NASA’s Sandra Magnus may be asked to “evacuate” into the Russian Soyuz, which would serve as their means of departing from the Station - should it be required.

Updating the current status of the threat, several memos - acquired by L2 - relay the probability level of the conjunction, with the latest noting “It’s now in the red threshold and if it doesn’t improve between now and TCA (Time of Closest Approach) at 11:39am CDT today they will put the crew in the Soyuz per the rules.”

“The plan that has been coordinated with MCC-M (Moscow) is that if required the crew will enter the Soyuz and be in place by 16:35 staying there until at least 5 minutes post TCA,” added another memo.

“WE will not be closing any additional hatches to enable us to immediately run the nominal depress procedures should they be needed.

“If the PC remains red the course of action will be to place the crew in the Soyuz from 5 minutes before TCA until 5 minutes after TCA.  This is ~2 hours after crew post sleep activities (crew will be awake). ”

Background:

The opening notification memos appeared to show the threat was low, even though tracking was expected to show the “miss distance” would reduce as the numbers were refined.

“Received a low concern, late notification (42 hours to TCA) conjunction for a small piece of PAM-D debris,” noted the opening memo relating to the threat. “This object showed good tracking and a miss outside the notification box. Subsequent updates showed miss distances to increase until the latest update.


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“(Tracking) explained that due to the low perigee of this object (154 km) they were in error running Solar Radiation pressure as they do for typical objects we encounter, correcting this value for this object this afternoon caused the miss distances to shrink, however (tracking) feels the radial miss should stay stable from here on out.

“(In the event of a) Red threshold violation, the crew will enter the return vehicle in preparation for departure and be prepared to close the hatch quickly if required.”

The following update noted the threat has increased to “medium” - following what appears to be an error in the tracking models - at a time deemed too late for the ISS to alter its position to decrease the collision threat.

“Medium concern conjunction: Object 25090 PAM-D debris - this conjunction alert has not gone out to the usual FD distribution because we’re past the maneuver go/no-time.

“(Tracking) detected an error in their processing that caused a big update, with resulting miss distances 0.5 x 4.6 x -2.6 km at TCA 71/16:39:39 GMT (1139 CDT Thurs),” noted the memo updating status.

“This object is quite elliptical with a low perigee, so we’re not getting a lot of tracks on it, but (Tracking) has increased tasking as much as they can. Hopefully the radial miss will hang in there at 0.5 km so this won’t be an issue.”

By Thursday morning, uncertainty still existed as to how big a threat the debris would be for a collision with the ISS.

“(Tracking) has an Invalid Red Threshold Violation of 2.34e-4. The large changes in downtrack are causing the 2 sigma downtrack requirement to be invalid, thus causing an invalid PC.

“These swings in downtrack can be typical of a high eccentricity (4220 x 150 km, ecc=0.24; ISS ecc= 0.001) high energy dissipation rate (0.2; ISS=0.002) object. The covariance are stable and well behaved, however are larger than typically seen at this stage of a conjunction (exact location of object has higher uncertainty).”
 楼主| jingyan66 发表于 2009-3-13 09:59 | 显示全部楼层
真的?假的?
红色极限..空间站乘员可能撤离..碎片威胁..
http://www.nasaspaceflight.com/2009/03/threat-to-iss-crew-soyuz/


RED threshold late notice conjunction threat to ISS - Crew may move to So ...
hkhtg090201 发表于 2009-3-12 23:53


ISS已避过碎片
 楼主| jingyan66 发表于 2009-3-13 09:59 | 显示全部楼层
Threat of debris collision passes the space station


BY WILLIAM HARWOOD
STORY WRITTEN FOR CBS NEWS "SPACE PLACE" & USED WITH PERMISSION
Posted: March 12, 2009

Space station commander Mike Fincke, flight engineer Yury Lonchkov and Sandra Magnus evacuated to the lab's Russian Soyuz spacecraft today because of a predicted close encounter with debris from a spent upper stage booster rocket. But the space junk streaked harmlessly past the station around 12:39 p.m. and the crew was cleared to re-enter the lab complex.

"OK guys, based on all the confirmations, most likely the object passed us by," a Russian flight controller said, according to a translator. "So you are go to egress Soyuz. Yury, also please tell us are you ready to start the leak check?"

"And Houston, space-to-ground 1, can you hear us?" Fincke called over the NASA communications circuit.

"We have you loud and clear Mike, on space-to-ground 1," a controller in Houston replied.

"OK, we understand we're clear (to) ingress back to the USOS (U.S. segment of the station)," Fincke said.

"And we're all very happy the (debris) has passed with no impact," Houston replied. "That's great news."

According to a NASA statement, the station crew members evacuated to the Soyuz as a precautionary measure "due to space debris that has been determined to be within the range where a collision is possible. News of the close approach came too late for flight controllers to coordinate an avoidance maneuver. A portion of a spent satellite motor is within the distance of the station's debris avoidance maneuver requirement 'box.'

"Crew members are entering their Soyuz TMA-13 capsule and soft-locking the hatches, in case the debris should affect the space station and they are required to undock. The closure of the hatches ensures the safety of the crew and the ability to quickly depart the station in the unlikely event the debris collided with the station causing a depressurization."

Time of closest approach was 12:39 p.m. EDT. It was not immediately known just how close the debris from the spent payload assist module, or PAM-D, upper stage rocket motor came to the international space station.

But all objects in low-Earth orbit are traveling at 5 miles per second and impacts are potentially catastrophic. A 0.4 inch-wide sphere of aluminum moving at orbital speeds packs the same punch as a 400-pound safe moving at 60 mph.

There are more than 18,000 pieces of space junk in low-Earth orbit the size of a baseball and larger. U.S. Strategic Command prioritizes radar tracking to protect manned spacecraft first, followed by high-priority military and civilian payloads.

Normally, the station's rocket thrusters are used to change its orbit slightly when close encounters are predicted. Putting the crew in the station's Soyuz lifeboat with little warning is unusual and it was not immediately clear why an alert about today's close encounter was not delivered or received in time to carry out a course change.
 楼主| jingyan66 发表于 2009-3-13 10:02 | 显示全部楼层
Debris passes near ISS


Posted: Thu, Mar 12, 2009, 8:43 PM ET (0043 GMT)

The crew of the International Space Station sheltered in the Soyuz capsule docked to the station for a brief time Thursday as a precaution as a small piece of orbital debris passed near the station. The late detection of the debris, thought to be a "yo weight" from a Delta 2 upper stage a little over 10 centimeters across and weighing less than a kilogram, prompted ISS controllers to have the three-person crew go into the Soyuz capsule for about 10 minutes around the time of closest approach, rather than try to maneuver the station out of the way. The debris did not hit the station and is estimated to have come only within several kilometers. The station and its crew resumed normal operations today. On several other occasions crews have similarly sheltered in the Soyuz module as a precaution, including last November.
 楼主| jingyan66 发表于 2009-3-13 10:04 | 显示全部楼层
Debris passes near ISS

Posted: Thu, Mar 12, 2009, 8:43 PM ET (0043 GMT)

The crew of the International Space Station sheltered in the Soyuz capsule docked to the station for a brief time Thursda ...
jingyan66 发表于 2009-3-13 10:02


此次事件,ISS并未做机动规避,乘员撤到“联盟”飞船上“避难”。事件元凶是霉菌的Delta 2火箭上面级碎片,约10cm大,重不到1kg
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