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The author:(作者)aaapublished in(发表于) 2013/12/8 8:55:05 Expert denies cancellation of Chang-fifth mission， scheduled for launch in 2018
Beijing authorities wide nets, December 7 (Xinhua Zhang Mian Mian), according to voice of the news aspect ratio reported, after 4 days of flying alone, last (6th), Chang the third spacecraft successfully implemented in China in recent months, the brake to become immortal, the third entered 100-kilometer lunar orbit from the Moon, from the earth-moon transfer transfer to the moon.
Braking is Chang in recent months a key track in the third flight control. Probe flew near the Moon, its relative velocity above Lunar escape velocity which cannot be effective deceleration braking, the probe will fly away from the Moon; and if the slowdown is too large, the probe crashed into the moon.
After 112 hours of flight and two mid-course corrections, Chang e arrived yesterday around the Moon, third, implementation of braking in recent months. Braking is Chang ' e third active in recent months slowed down, space-brakes, 2.38 km per second speed reduction to Moon's escape velocity, so well captured by the Moon's gravity, entered lunar orbit 100 km x km.
Chang, third detector expert Wu Xueying: we would like to achieve the moon landing mission, needs to probe the Moon captures first, forming a lunar orbit, the probe in lunar orbit and stable operation, and then choose the right time to power down, the task of achieving a soft landing on the lunar surface.
He Change compared to the first number, the second number to become immortal, the third in recent months variable thrust engine brake first used 7,500 cattle, only an engine ignition slow orbit. Wu Xueying said that as one of the most critical variable axle, brake problems is precise measurement and control in recent months.
Wu Xueying: brake if small, the probe will miss Moon, if too large, the probe would crash into the moon. Difficulties are also precision, measured tracks, control parameters to be evaluated, and detectors have to be performed.
Complete brake Chang, third in recent months, and would orbit again after a few days, reduced to a distance of lunar surface height of 15 kilometres, for months a "soft landing" to prepare.
Wu Xueying: braking in recent months after the probe in lunar orbit and stable operation, our in-orbit operation of the actual situation, selecting the right time to power down, which enables probe Lunar soft landing, and after that, the lander to inspect two players separation, of Lunar Lander in position detection and patrol Moon patrol survey.
Chang e third mission was carried out smoothly, and are outlined for everyone a beautiful Moon exploration prospects when media reports expected Tower "fifth" to stop the development. At the same time, or to cancel manned lunar program in China. The message allegedly from the Shanghai Academy of spaceflight technology insiders.
Zhang Yuhua were Shanghai Academy of spaceflight technology researcher, and Chang-third Deputy Commander, Deputy Chief Designer of the spacecraft system, but she has another identity of what most people don't know – Chang-detector systems, fifth Deputy. For the past two days, going around in the media between Chang-er fifth mission cancelled message, her first reaction was: nowhere!
Zhang Yuhua: I have since yesterday evening, has always been that we can call it as plagued by false information or disinformation news, I also confirm that we are certain there was no official announcement of such messages.
After verification, she told the press conference made it clear that the voice of China: certainly not the case.
In accordance with the overall arrangements of China's lunar exploration program, Chang e, first, third, fifth, a few odd naming detectors are just stars, even the stars backing up stars. Chang, Chang has completed the second, wrapping, first lunar exploration mission. Just completed brake Chang third in recent months about the moon landing. Zhang Yuhua said Chang are backed up stars Chang, third, fourth, and it has been in development, production, but cannot replace Chang, fifth on the function and mission objectives.
Zhang Yuhua: design of the fourth so far is consistent with a third, or a lunar soft landing and patrol functions, it also has a lot of new technologies, Lunar return land greatly improved technologies, then how to change functionality should work in practice.
Senior Advisor Ouyang Ziyuan said lunar exploration program, stars as a backup, Chang e, according to Chang the third to the fourth, completion of tasks identified. Even if it still executes the lunar surface a "soft landing", will also select and Tower ", third" in different areas. Chang, fifth Moon missions on the basis of the completed in China's three-step lunar exploration program "return" task.
Ouyang Ziyuan: Chang-fifth will probe is landing drill sampling, intact samples brought back to Earth to test these.
In other words, "Chang-fifth" body's task is not only never "replaced" is more important, its development has been "on the road". Chang the third launch of Eve, Wu Weiren, Chief Designer of moon exploration engineering has revealed that Chang currently fifth, development is going smoothly, it will be run by China's new generation of high thrust rockets at the long fifth Hainan Wenchang launch. Zhang Yu flower also said that Chang is stepping up development, fifth and is expected to be launch around 2018.
Zhang Yuhua: I'm sure I responsibly say, our Moon is stepping up development, fifth, in addition, I am also the goddess of fifth deputy conductor of the spacecraft.
For media coverage or to cancel Manned Moon landings, in 2004, the State Council approved China's lunar exploration program, "wound", "down", "back" plan have made clear, the third step is to the moon before 2020 automatic sampling and sample return probe. In other words, within this plan, there is no "one moon", but does this mean that China's manned lunar has no plans in the future? Not long ago, the Advisor Ouyang ziyuan, Moon exploration engineering long before the interview, once referred to three schedules.
Ouyang Ziyuan: United States Space Agency Secretary said that at its previous session, if Chinese people want to, they can be implemented in 2020, manned moon landing. Ye Peijian said that China probably manned moon landing may be the best time in 2025. A Chinese Academy of Sciences space exploration of long-term planning in the year 2030. According to one of the three, maybe people can figure it out probably in this segment.
Ouyang Ziyuan said, the current Lunar "around", "down", "back to the" three-step strategy, will lay the Foundation for future deep space exploration.
Ouyang Ziyuan: probably after we finish this three-step proved a problem, the first Chinese to the Moon, we could safely fall II, third I also have the ability to make it safe to return. These three steps done what does this all mean? We are sure of sending people up there.
(Original title: expert rumor: Chang is not canceled fifth mission scheduled to launch in 2018)
央广网北京12月7日消息(记者张棉棉)据中国之声《新闻纵横》报道，经过4天多的独自飞行，昨天(6日)下午5点53分，我国嫦娥三号探测器成功实施近月制动，嫦娥三号由此进入距月面100千米环月轨道，从地月转移段转移到环月段。
近月制动是嫦娥三号飞行过程中一次关键的轨道控制。探测器飞临月球附近时，其相对速度高于月球逃逸速度，如不能有效减速制动，探测器将飞离月球；而如果减速过大，探测器则将撞向月球。
经过112小时的飞行和两次中途修正，嫦娥三号昨天抵达月球附近，实施近月制动。近月制动是嫦娥三号主动减速，进行太空刹车，把速度降低到每秒2.38公里月球逃逸速度以下，从而顺利被月球引力捕获，进入100公里×100公里的环月圆轨道。
嫦娥三号探测器系统专家吴学英：我们要实现落月的软着陆任务，首先就需要探测器被月球捕获，形成一个环月轨道，探测器在这个环月轨道上稳定运行，再选择合适的时机进行动力下降，实现一个软着陆于月面的任务。
和嫦娥一号、二号相比，嫦娥三号的近月制动首次使用了7500牛的变推力发动机，只需一次发动机点火即可完成减速变轨。吴学英说，作为最关键的一次变轨，近月制动的难点是精准测控。
吴学英：制动量如果小了，探测器就会与月球擦肩而过，如果过大了，探测器就会与月球相撞。难点也在精度，轨道要测得准，控制参数要计算得准，探测器也要执行得准。
完成近月制动的嫦娥三号，将在几天后再次变轨，降低到距月面15公里的高度，为月面“软着陆”做准备。
吴学英：近月制动后就是探测器将在环月轨道上稳定运行，我们根据在轨运行的实际情况，选择合适的时机进行动力下降，也就是实现了探测器月面的软着陆，之后着陆器和巡视器两器分离，着陆器进行月面的就位探测，巡视器进行月面的巡视勘察。
在嫦娥三号任务顺利开展、并正为大家勾勒美好的探月前景之时，有媒体报道，预计的“嫦娥五号”将停止研发。同时，我国或将取消载人登月计划。据称该消息来自上海航天技术研究院相关内部人士。
张玉花是上海航天技术研究院研究员，同时也是嫦娥三号探测器系统副总指挥、副总设计师，然而她还有另一个不为大多数人所知道的身份——嫦娥五号探测器系统副总指挥。对于近两天，媒体上四处流传的有关嫦娥五号任务取消的消息，她第一反应是：莫名其妙！
张玉花：我从昨天傍晚起，一直被这一条我们可以把它叫为假消息或者造谣消息所困扰，我也证实，我们肯定没有官方对外宣布这种消息。
经过核查后，她对中国之声记者明确表示：肯定没这么回事。
按照我国探月工程整体安排，嫦娥一号、三号、五号这几个奇数命名的探测器是正星，偶数则为正星的备份星。嫦娥一号、嫦娥二号已经完成了环绕月球探测的任务。刚刚完成近月制动的嫦娥三号即将在月球软着陆。张玉花表示，嫦娥四号是嫦娥三号的备份星，它已经在进行研制、生产，但从功能和任务目标上不可能取代嫦娥五号。
张玉花：四号到目前为止的设计状态跟三号还是一致的，还是月球软着陆和巡视的功能，回的话它还有很多一些新技术，月面增加返回再陆很多技术，之后再怎么改应该也实现不了回的功能。
探月工程高级顾问欧阳自远说，作为备份星，嫦娥四号会根据嫦娥三号任务的完成情况确定。即便仍旧执行月球表面的“软着陆”，也会选择和“嫦娥三号”不同的区域。而嫦娥五号，将在落月任务的基础上，完成我国探月工程三步走中“回”的任务。
欧阳自远：嫦娥五号将要探测的就是软着陆上去打钻取样，原封不动把这些样品带回地球测试。
换句话说，“嫦娥五号”身上的任务不仅是从未“被替代”，更重要的是，它的研制工作其实早已“在路上”。嫦娥三号发射前夕，探月工程总设计师吴伟仁曾透露，目前嫦娥五号研制进展顺利，它将由我国新一代大推力火箭长征五号在海南文昌发射。张玉花同样表示，嫦娥五号正在加紧研制，预计将于2018年左右发射。
张玉花：我肯定负责任地说，我们的嫦娥五号正在加紧研制，另外，我同时也是嫦娥五号探测器的副总指挥。
对于媒体报道或将取消载人登月的说法，在2004年国务院批准的我国探月工程“绕”、“落”、“回”规划中已经明确，第三步是在2020年前进行月球样品的自动取样和返回探测。也就是说，在这一规划中，没有“人登月”的内容，但是，这是否意味着，我国载人登月未来就没有计划？不久前，探月工程高级顾问欧阳自远在接受记者采访时，曾经引用了三个时间表。
欧阳自远：美国航天局上一届的局长说，假如中国人愿意的话，他们可以在2020年实现载人登月。叶培建说，中国大概要载人登月可能最好的时间2025年。中国科学院一个空间探测长远规划出了可能在2030年。这三个数据都有根据，大概人们就可以猜出来大概在这一段。
欧阳自远同时表示，目前探月工程“绕”、“落”、“回”的三步走战略，将为我国未来的深空探测奠定基础。
欧阳自远：大概我们完成了这三步以后证明了一个问题，第一中国人能够到月球，第二我们能够安全落下去，第三我还有本事把它安全的返回来。这三步做完就表明什么？我们有把握把人送上去了。
(原标题：专家辟谣：未取消嫦娥五号任务 拟于2018年发射)
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