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[中国发射] 2018年6月,嫦娥四号中继星将由CZ-4C发射

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陈昕海 发表于 2016-6-10 19:45 来自航空航天港手机版! | 显示全部楼层
wsl20005 发表于 2016-6-10 19:04
嫦娥四号国际合作任务确定,4M后续任务看来是嫦娥五号搭载了,这样说来,CE5在2018年发射,,,?

嫦五是2017年
Lsquirrel 发表于 2016-6-10 19:56 | 显示全部楼层
protoss1 发表于 2016-4-3 21:20
只是中继没意思啊,至少上面装个镜头啊,拍拍好照片也行。

公开的论文提到,中继星的载荷就是相机
陈昕海 发表于 2016-6-10 19:59 来自航空航天港手机版! | 显示全部楼层
Lsquirrel 发表于 2016-6-10 19:56
公开的论文提到,中继星的载荷就是相机

嫦五T1在14年就在L2 拍过了
Flying_Pencil 发表于 2016-6-28 21:13 | 显示全部楼层
本帖最后由 Flying_Pencil 于 2016-6-28 21:19 编辑

昨日,荷兰NSO和CNSA在北京签署了一项在月球探索方面的合作协议
包括将一个荷兰制造的无线电天线搭载于本任务
该载荷用于研究宇宙早期结构,监测太阳风暴等极端空间天气


Dutch radio antenna to depart for the moon on Chinese mission

28 June 2016


Researchers at Radboud University, ASTRON and the Delft company Innovative Solutions in Space (ISIS) are to develop a new instrument that will be onboard the Chinese Chang’e4 satellite that will be placed in the Lagrange point L2 of the Earth-Moon system in 2018.

NSO Director Ger Nieuwpoort and CNSA administrator Xu Dazhe signed the agreement in Beijing on 28 June 2016.Today, in Beijing, The Netherlands Space Office (NSO) and the Chinese national space agency CNSA signed a partnership agreement on a mission to the moon, made possible by the organisations’ Memorandum of Understanding (MoU) in 2015. The agreement was prepared with support from the department for Innovation, Technology and Science of the Netherlands Embassy. The radio antenna is the first Dutch-made scientific instrument to be sent on a Chinese space mission, and it will open up a new chapter in radio astronomy. “This instrument will help us find answers to vital questions concerning the origin of the universe,” said Gert Kruithof from ASTRON, “and this project will represent a new milestone in astronomy.”

Long-term partnership

Radboud University astronomers Heino Falcke and Marc Klein Wolt are the scientific advisors for the project and have spent years working towards taking this important step. “The instrument we are developing will be a precursor to a future radio telescope in space.” said Klein Wolt, director of the Radboud Radio Lab. “We will ultimately need such a facility to map the early universe and to provide information on the development of the earliest structures in it, like stars and galaxies.”


Albert-Jan Boonstra, programme manager at ASTRON, explained: “Our years of experience in the construction of the Westerbork radio observatory, the Low Frequency Array LOFAR and the development of the Square Kilometre Array will be put to use in the construction of this new instrument.” Experts in innovative satellite systems engineering from ISIS will be responsible for the system integration of the instrument, and its accommodation on the Chang’e4 satellite.

Measuring radio emission in the virtually unexplored frequency regime

Why is it so important for the measuring instruments to be placed behind the moon? Heino Falcke explained: “Radio astronomers study the universe using radio waves, light coming from stars and planets, for example, which is not visible with the naked eye. We can receive almost all celestial radio wave frequencies here on Earth. We cannot detect radio waves below 30 MHz, however, as these are blocked by our atmosphere. It is these frequencies in particular that contain information about the early universe, which is why we want to measure them.”

As so little is known about this part of the electromagnetic spectrum, the measurements made by the Dutch radio antenna on the Chinese satellite could be the first to provide information on the development of the earliest structures in the universe. This information could help confirm the Big Bang theory. As these radio waves are so weak, the satellite needs to be placed behind the moon, where there is relatively little disturbance by radiation from sources on Earth.

Solar storms and radio pulses from planets

Another task of the antenna is to monitor the ‘weather’ in space. Powerful events such as solar storms can affect telecommunications here on earth. Klein Wolt: “More knowledge on the impact of such eruptions on the surroundings will help us to better predict such events. We also want to measure strong radio pulses from planets like Jupiter and Saturn to obtain new information about their rotational speed.” Finally, the team wants to produce the first reasonably accurate map of the sky at these low frequencies, which should be possible after a few complete rotations of the satellite and moon around the earth. Klein Wolt is already looking ahead: “We hope signals from the early universe will slowly emerge after a year or two of measurements and data analysis.”http://www.ru.nl/ct/english/vm/n ... on-chinese-mission/



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陈昕海 发表于 2016-6-28 21:47 来自航空航天港手机版! | 显示全部楼层
Flying_Pencil 发表于 2016-6-28 21:13
昨日,荷兰NSO和CNSA在北京签署了一项在月球探索方面的合作协议
包括将一个荷兰制造的无线电天线搭载于本 ...

希望这样的合作越来越多
wsl20005 发表于 2016-7-5 16:13 | 显示全部楼层
Flying_Pencil 发表于 2016-6-28 21:13
昨日,荷兰NSO和CNSA在北京签署了一项在月球探索方面的合作协议
包括将一个荷兰制造的无线电天线搭载于本 ...

NSO Director Ger Nieuwpoort and CNSA administrator Xu Dazhe signed the agreement in Beijing on 28 June 2016.


http://www.spaceoffice.nl/en/News/1758/Dutch-radio-antenna-to-depart-for-the-moon-on-Chinese-mission.html

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fesel 发表于 2016-7-6 13:25 | 显示全部楼层
西昌首次发射长征四号系列?
陈昕海 发表于 2016-7-6 13:29 | 显示全部楼层
fesel 发表于 2016-7-6 13:25
西昌首次发射长征四号系列?

对            
spacedog 发表于 2016-7-6 14:12 | 显示全部楼层
本帖最后由 spacedog 于 2016-7-6 23:27 编辑

为什么要改到西昌发射?如果说纬度低比较有利的话,那么文昌不是更有利?
当然西昌有现成的“毒燃料”补加系统不用做大的改动,而文昌目前没有这个系统,要新建起码的一两年,但是估计今后不会再增建这种趋于淘汰的“毒燃料”火箭的发射设施了。
不知道长征六号A能否代替CZ-4C?
ssizz 发表于 2016-7-6 15:35 | 显示全部楼层
spacedog 发表于 2016-7-6 14:12
为什么要改到西昌发射?如果说唯独低比较有利的话,那么文昌不是更有利?
当然西昌有现成的“毒燃料”补加 ...

长征六号A首射再早也得明年,要执行LTO之类的任务还需要加上面级。
对于2018年的深空任务而言,这太仓促了。
wsl20005 发表于 2016-9-11 20:11 来自航空航天港手机版! | 显示全部楼层
高分十号用长四丙发射失败,对本次任务会造成什么影响?
darklighter 发表于 2016-9-11 20:17 | 显示全部楼层
本帖最后由 darklighter 于 2016-9-11 20:20 编辑

没看到那条报道确定西昌发射了呀?怎么都认准西昌了?
酒泉虽然倾角大些,运载能力低一点儿,但工位、75°倾角射向落区都是现成的,可能性也很大呀。
ssizz 发表于 2016-9-11 20:59 | 显示全部楼层
darklighter 发表于 2016-9-11 20:17
没看到那条报道确定西昌发射了呀?怎么都认准西昌了?
酒泉虽然倾角大些,运载能力低一点儿,但工位、75° ...

估计是没想到土鳖能把这样的卫星做到多小
从西昌打,运力估计都不到1.1吨,从酒泉能做到多少公斤?
darklighter 发表于 2016-9-11 21:19 | 显示全部楼层
ssizz 发表于 2016-9-11 20:59
估计是没想到土鳖能把这样的卫星做到多小
从西昌打,运力估计都不到1.1吨,从酒泉能做到多少公斤?

也没有消息说这颗星多重,所以一切还是未知。
黑与白 发表于 2016-9-11 21:41 | 显示全部楼层
wsl20005 发表于 2016-9-11 20:11
高分十号用长四丙发射失败,对本次任务会造成什么影响?

没有任何影响           
yzh205918 发表于 2016-9-12 07:46 | 显示全部楼层

谁说的?!如果这次确实是三级故障,必须准确定位,彻底归零!清除隐患!否则还真的有影响!这颗星需要三级二次点火才能入轨。
wsl20005 发表于 2016-10-4 15:49 | 显示全部楼层
本帖最后由 wsl20005 于 2016-10-4 15:55 编辑







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黑与白 发表于 2016-10-4 16:28 | 显示全部楼层
yzh205918 发表于 2016-9-12 07:46
谁说的?!如果这次确实是三级故障,必须准确定位,彻底归零!清除隐患!否则还真的有影响!这颗星需要三 ...

你也不看看这是几年之后的事
darklighter 发表于 2016-10-5 10:03 | 显示全部楼层
425kg挺轻的,完全可以从酒泉走63°倾角发射,没必要去没发射过的西昌折腾。
63.5°是历史上长四从酒泉发射过的最小倾角(我之前说75°是记错了),不排除有更小的可行倾角。
yzh205918 发表于 2016-10-5 11:04 | 显示全部楼层
黑与白 发表于 2016-10-4 16:28
你也不看看这是几年之后的事

我知道是后年的事,我的意思是,如果这次确实是三级发动机的故障,而且不能彻底归零,弄不好液发40A
要废了!!
希望不是发动机本身的原因!!
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