印度宣布今天29日早7点30分成功实施第4次变轨达到267000 ...

原英文稿，Khabrein.info网站，印度ISRO官方网站并没有公布变轨消息，从行文来看，有可能是印度爱好者自己写的：

Chandrayaan-1 was successfully raised to its fourth orbit this morning around 7.30. “Everything went on as planned,” M. Annadurai, Project Director of Chandrayaan-1 said.

The spacecraft was raised to the predetermined apogee of 2,67,000 km. And thus it has overcome the shortfall of 35,000 km apogee in the third orbit.

It will now take six days for Chandrayaan-1 to come once around the earth. So the next firing will take place only after six days. The apogee of the fifth orbit will be around 3,81,000 km.

It is at this apogee that it will come under the influcence of the moon’s gravity. Further manoeuvring will then be done to make Chandrayaan-1 go around the moon.

History was made at 6.20 am on 22nd October; when India’s first mission to moon, Chandrayaan1 took off from Sriharikota. It was a blissful sight to behold since this is a completely Indian project, the cheapest ever conducted so far and having the maximum scientific value at the same time. The mission marks India’s grand entry into the elite group of nations boasting lunar missions. Although the history of human lunar missions is more than 50 years old, some nations have successfully sent human missions and collected huge amounts of data, Chandrayaan1 has a special significance in the wake of India’s rise to power.

The rediscovered interest in moon of all the astronomical community and the pressing need of addressing the basic questions about Earth put Chandrayaan1 in a different light.

As already mentioned, chandrayaan1 is the cheapest ever moon mission, taking into account the rise in inflation and the long interval of time since last lunar mission. A the same time, the fact that it has 11 payloads from different countries and various space agencies makes it the most scientifically valuable mission as well. This is an achievement in itself and it has come off due to the brilliant, smart and rigorous efforts by ISRO scientists. Some of the other missions by Japan and China slated to take place next year cost around thrice of Chandrayaan1.

The process of putting Chandrayaan into moon’s orbit is quite interesting. The satellite first makes elliptical orbits around Earth of larger and larger apogee(farthest point from Earth), while the perigee(nearest points from Earth) remains around 300 kms only. Finally, in the third stage of such expanding orbits around Earth, the satellite makes one elliptical revolution with Earth and moon as its two foci, eventually settling into an orbit around moon due to its gravity. Beginners might think that the job is done once it is placed in moon’s orbit, but they are mistaken. The gravitational pull of all the other heavenly bodies deflects the satellite from its orbit and it has to be controlled from Earth very systematically and painstakingly to keep it in the orbit. Very very small rockets on the surface of the satellite will do that job and triggering a particular rocket for corrections will be a great technological challenge. The Indian scientists have shown their grit and perseverance in making this mission happen and will definitely be up to any challenge coming their way!

While Chandrayaan’s various payloads will collect invaluable and new data, one of the missions is to send a probe onto a predefined location on the surface of the moon. This is preparatory to sending Chandrayaan2 in which, a robot would be sent and should be placed at the desired location safely. Among other things, the mission should reveal interesting facts about the atmosphere, nature of surface, metallurgical composition and topographical map of Earth’s only natural satellite. The sheer number of experiments involved in the mission should make it one of the most important and memorable missions ever sent to moon.

India has huge plans ahead with Chandrayaan2 and Chandrayaan3. the third edition should be the most amazing since it is going to be a manned mission, putting an Indian on the moon for the first time, through an Indian space effort.

Now we only have to wait a little while for our satellite to get into moon’s orbit. The life of this satellite is supposed to be around two years, after which the fuel required to keep it in orbit will be exhausted. Nevertheless, these two years, rather its lift off itself had brought glory to Mother India and added yet another milestone in its magnificent progress!!

第三版应该是最令人惊讶的，因为它会是一个载人飞行，首次通过印度空间的努力把一名印度人放在月球上。
能回来不>(;P ;P

如果照印度官方宣布的第三次变轨完全是按计划的,非常精确,没有问题
那么这篇文章就极大可能是印度网友自己假造的
第四次变轨现在还没有进行

原帖由 songfq 于 2008-10-29 19:13 发表
如果照印度官方宣布的第三次变轨完全是按计划的,非常精确,没有问题
那么这篇文章就极大可能是印度网友自己假造的
第四次变轨现在还没有进行

看ISRO官方的通告：

Chandrayaan-1’s Orbit Closer to Moon
October 29, 2008   
   
The fourth orbit raising manoeuvre of Chandrayaan-1 spacecraft was carried out today (October 29, 2008) morning at 07:38 am IST. During this manoeuvre, the spacecraft’s 440 Newton liquid engine was fired for about three minutes. With this, Chandrayaan-1 entered into a more elliptical orbit whose apogee (farthest point to Earth) lies at 267,000 km (two lakh sixty seven thousand km) while the perigee (nearest point to Earth) lies at 465 km. Thus, Chandrayaan-1 spacecraft’s present orbit extends more than half the way to moon. In this orbit, the spacecraft takes about six days to go round the Earth once.

The health of the spacecraft is being continuously monitored from the Spacecraft Control Centre at ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bangalore with support from Indian Deep Space Network antennas at Byalalu. All systems onboard the spacecraft are performing normally. One more orbit raising manoeuvre is scheduled to send the spacecraft to the vicinity of the moon at a distance of about 384,000 km from the Earth.

http://www.isro.org/pressrelease/Oct29_2008.htm

原帖由 jingyan66 于 2008-10-29 19:16 发表



看ISRO官方的通告：

Chandrayaan-1’s Orbit Closer to Moon
October 29, 2008   
   
The fourth orbit raising manoeuvre of Chandrayaan-1 spacecraft was carried out today (October 29, 2008)  ...

看来第四次变轨确实完成了，下一次看11月3日的啦

印度ISRO官方网站月船一号的数据:
10月22日早6点22发射,轨道255x22860;
10月23日早9点第一次变轨,轨道301x37830;
10月25日早5点48第2次变轨,轨道336x74715;
10月26日早7点08第3次变轨,轨道348x164600

随评月船一号运行特点:
首先,火箭推力小,只能送入2万多千米的椭圆轨道,不像我们的嫦娥一号是5万多千米;  
第二,变轨我们第一次远地点其余3次近地点,而月船一号每次都是在近地点附近而不是近地点本身变轨,每次都抬高一点近地点,因为26日变轨后的周期73小时,不出意料的话,第四次变轨应该是26+3=29日早上

天涯那个说月船正在坠落的帖子该被鞭尸了:P

楼主，你用什么翻译的？？那个GOOGLE的网页翻译？？;P

你这软件翻译的也太省事了，怎么也得人工润润笔。


ps：头像是你姑娘不？

是我姑娘

印度拥有巨大的计划推进月船-2和月船-3。第三版应该是最令人惊讶的，因为它会是一个载人飞行，首次通过印度空间的努力把一名印度人放在月球上。

^^^^^^^^^^^^^^^^^^^^
三哥大跃进啊。

原帖由 songfq 于 2008-10-30 00:30 发表
是我姑娘

很可爱的小姑娘!~

英译汉的能力有待提高:D

原帖由 鲁哈尼 于 2008-10-29 19:37 发表
天涯那个说月船正在坠落的帖子该被鞭尸了:P

-----------------------------------------------------------------
有错吗??人家引用软件数据说轨道正在下降也没错啊??

天涯那个说阿三总统承诺2007年发射月船的帖子不知道被鞭尸多久了啊!!哈哈!!

阿三的轨道控制也太差了，照这样月船根本进不了月球轨道，有可能直接撞在月球上。

就是不知道阿三的燃料还够吗???;P

为什么我看不到头像和签名？

又浪费燃料了，不知道到了月球能不能减速。

印度的探月计划早于我国，工程实施按部就班，任务载荷性能较高，有不少可圈可点之处。我们应该虚心学习，幸灾乐祸冷嘲热讽是不可取的。

]]

看了都晕，到底现在那卫星怎么样了？是恢复正常了？

我就看个热闹,你们继续.

心急吃不了热豆腐

]]

正常就好，正常就好，大家都是人类嘛，共同发展，共同发展！[:a4:]

原帖由 DFH 于 2008-10-30 11:20 发表
印度的探月计划早于我国，工程实施按部就班，任务载荷性能较高，有不少可圈可点之处。我们应该虚心学习，幸灾乐祸冷嘲热讽是不可取的。

嗯，阿三抢先出发，却最后抵达，真是不错。哦，我忘了，阿三还没抵达呢。