Talk:Chandrayaan-1/Archive 1

This is an archive of past discussions about Chandrayaan-1. Do not edit the contents of this page. If you wish to start a new discussion or revive an old one, please do so on the current talk page.

Archive 1

Missing 'History' section

Typically mission pages include a short segment about the genesis of the mission, its there for MOM but not here. Here are two resources that touch upon it : http://shiksha.isro.gov.in/pdf/books/1.pdf http://www.mathrubhumi.com/english/news/science/india-s-moon-mission-nine-years-in-the-landing-7084.html — Preceding unsigned comment added by 76.126.254.216 (talk) 22:35, 17 August 2015 (UTC)

Article Needs Pictures from the Lunar Surface

Article Needs Pictures from the Lunar Surface. Also will these be the first color pictures from the surface of the Moon? — I've posted a nice title image of the spacecraft on PSLV(without ISRO's consent :) in good faith), and shifted the older one to the specs sub heading... Chaufri (talk) 16:56, 1 November 2011 (UTC) chaufri 66.227.84.101 (talk) 23:37, 14 November 2008 (UTC)

Plagiarism

The point is, it doesn't matter how Chandrayaaaaaaaaaan is spelt, what does matter is that this artice, or at leat most of it is plagarized directly from the ISRO website. Come on, give this topic a proper article. Don't just copy and paste...

PLAGIARISM - the link on 'lunar exploration' first paragraph leads to 'Image:Ejaculation educational ani short.gif' Please change it. —Preceding unsigned comment added by 72.50.18.56 (talk) 23:45, 22 October 2008 (UTC)

Translitteration

Minor squibblings aside, the correct IAST translitteration would be 'candrayAna' , the /c/ isn't aspirated, see? Asdfgl 17:36, 11 January 2007 (UTC)

Fixed, if you meant this particular instance. —Mykhal (talk) 12:15, 1 January 2019 (UTC)

Delay

I read somewhere that this is gonna be delayed by 3 months. is it true? shouldn't it be updated to the article? --218.208.246.156 (talk) 19:44, 18 March 2008 (UTC)

Looks like it is pushed back to "the third quarter of 2008" now. Rmhermen (talk) 18:03, 6 June 2008 (UTC)

~~India To Launch First Lunar By Year End --Fukumoto (talk) 10:30, 7 June 2008 (UTC)~~

ISRO to launch moon mission by December --Fukumoto (talk) 10:40, 7 June 2008 (UTC)

the project head is "Mayilswamy Annadurai" and not "maylswamy annadurai" —Preceding unsigned comment added by Drarvindr (talk • contribs) 11:49, 22 October 2008 (UTC)

Its Mylswamy Annadurai and is already displayed in the article.

${\mathfrak {ChitranshGaurav}}$ ^{( $Talk$ )} 09:25, 6 November 2024 IST [refresh]

Meaning of name?

Meaning of name, please? (If it's named for a person then we're presumably going to need a disamb page and/or "See also".) -- 201.53.7.16 (talk) 16:17, 22 October 2008 (UTC)

Chandrayaan is a Sanskrit word which means a "Moon-vehicle". —Preceding unsigned comment added by Red Spider06 (talk • contribs) 18:22, 11 November 2008 (UTC)

It is Hindi not Sanskrit. Sanskrit version is ChandraYaana. 216.119.180.74 (talk) 14:59, 30 June 2014 (UTC)

Multi language transileration

Can someone explain the rationale in writing "Chandrayaan" in every/any Indian language? Does the project or its success belong to any particular state or the whole nation?Dineshkannambadi (talk) 23:18, 22 October 2008 (UTC)

Chandrayaan is a sanskrit word and as such only sanskrit transliteration is required here.-Bharatveer (talk) 04:48, 23 October 2008 (UTC)

Then why is it in Hindi? 216.119.180.74 (talk) 00:18, 3 July 2014 (UTC)

It is not Sanskrit, it is Hindi. Sanskrit would be Chandrayaana. 216.119.180.74 (talk) 15:00, 30 June 2014 (UTC)

I agree.Dineshkannambadi (talk) 12:24, 23 October 2008 (UTC)

Regionalism Here also

Whenever any satellite or mission is launched, people will ask about from where its launched and whats the purpose. In the starting para it mentioned when it was launched (on 22nd oct) but it didnot mention ab Satish Dawan Space Centre or Sriharikota from where its being launched. But I do see that so n so scientist belonged to Tamilnadu, Mysore, etc.... have been mentioned. Well its upto individuals. The credit for this goes to Madhavan Nair n his entire team. So its collective success of ISRO scientists. Indianprithvi (talk) 08:37, 23 October 2008 (UTC)

That was not meant to be regionalism, just took it from the newspaper article as is. I have no issue with their native places being removed. You are right, the credit goes to the entire team. If you see my edits yesterday, you will find that I reverted, on several occassion, the addition of a scientist's name (which was being added repeatedly by an IP) untill I could find a citation for it. When I found the newspaper citation, I went ahead and verified that Mylswamy Annadurai and Shiva Kumar were indeed the movers and shakers of the project (to corroborate which I even added an external link regarding an interview with S.K. Shiva Kumar) and only then did I add their names with the newspaper citation to the article.Dineshkannambadi (talk) 12:34, 23 October 2008 (UTC)

I have created a seperate section listing the top scientists in the mission (there may be more). This is more inclusive. I have also provided multiple citations for the same.Dineshkannambadi (talk) 15:54, 29 October 2008 (UTC)

Orbital elements

When I look at the sidebar, it gives the orbital elements. As the probe is still in Earth orbit, I assumed the elements given were the current orbital elements of some other spacecraft, as GTO is not a polar orbit.. Reading the text leads me to believe that the data given are the intended final LUNAR orbit. Is there a way to make this clear in the sidebar? —Preceding unsigned comment added by 70.168.46.132 (talk) 12:30, 23 October 2008 (UTC)

Photographs

There have been photographs taken of the earth while testing, these should be added to the article. Note that one of these photographs was flipped (mirrored) by ISRO. 120.138.113.202 (talk) —Preceding undated comment was added at 08:55, 9 November 2008 (UTC).

Here is a picture during construction/testing [1]205.175.123.207 (talk) 05:17, 7 November 2012 (UTC)

Tracking

The article mentions a single tracking station, the one in Bangalore. Is ISRO using additional tracking stations, or are they limiting commands and data return to the 10 or 11 hours that the moon is in the sky over Bangalore? As far as I know, PR China, the USA and Russia all have multiple tracking stations (three or more) so that communications is possible 24 hours a day. GBC (talk) 02:16, 25 October 2008 (UTC)

ISRO uses some three or four other tracking stations, including one in Australia. We hear about this only after a satellite is launched.--PremKudva^Talk 06:35, 25 October 2008 (UTC)

ISRO has some 4 tracking stations, i know some of them - Hawaii, USA Australia and i think 1 is in Norway —Preceding unsigned comment added by 117.200.96.189 (talk) 20:01, 20 November 2008 (UTC)

Clean up

The sentences describing orbit raising manoeuvres barring the last one should be converted to the past tense. The TMC Testing section has redundant information about the instruments aboard Chandrayaan and outdated information about its current orbit. These redundant paragraphs should be deleted. --67.180.191.21 (talk) 06:23, 4 November 2008 (UTC) Axe

So what are you waiting for? You can do it yourself.--PremKudva^Talk 04:10, 11 November 2008 (UTC)

External Links to Animations and Videos about Chandrayaan

The User: Gppande has objected to and removed the following external links added to this article:

Animations & Videos

I am a new user and am familiarising myself about the posting rules.

Please provide more "specific" information about the basis for your objections to adding links to the "Chandrayaan Animation by Thejes" in the External Links section for Chandrayaan-1?

All I received are "general" comments about the objection. However I would like to point out that there may likely be some concern based on "Advertising and Conflicts of Interest" category as my company owns the Thejes website. However I also understand that ....

If the link is to a relevant and informative site that should otherwise be included, please consider mentioning it on the talk page and let neutral and independent Wikipedia editors decide whether to add it.

We feel the Chandrayaan Animation would be a useful additional visual (video) resource for readers of this Wikipedia page to find out more information about Chandrayaan-1 mission and other upcoming missions by ISRO.

Please advise your thoughts / decision? (Thejes (talk) 22:19, 10 November 2008 (UTC))

The second link is an advertisement for the company that made the animation. As for the first link it is too long, too musical, and deviates a lot from the Chandrayaan-1 mission. It looks too much like a ISRO documentary. If it has to be encyclopaedic in nature it should be much shorter and show only the mission from take off to lunar orbit. Gppande is right is removing it.--PremKudva^Talk 11:40, 11 November 2008 (UTC)

Thanks for your timely response and thoughts / feedback....which are duly noted. (Thejes (talk) 12:41, 11 November 2008 (UTC))

Read WP:External links. I have replied on your talkpage. --GPPande talk! 18:31, 13 November 2008 (UTC)

Removing reactions section

I am removing the reactions section under the MIP impact section. As an Indian I too am very happy and euphoric and everything. And while the section does have references, it sounds completely weasely, un-encyclopaedic and spoils the look of the article.--PremKudva^Talk 05:40, 15 November 2008 (UTC)

Wo, this is not a consensus with 1 person.Lihaas (talk) 07:40, 28 May 2010 (UTC))

In the one and a half years since the reactions list was removed you are the first person to object!--PremKudva^Talk 10:43, 28 May 2010 (UTC)

Yes, and whats the point? That statement doesnt move discussion along

WP:Consensus can change; nor was the removal taken with consensus (although fair enough the editor was being WP:Bold)

At any rate, reaction lists serve a purpose to the reader in that the student who visits the page notes that "Wikipedia articles should be used for background information, as a reference for correct terminology and search terms, and as a starting point for further research. "Lihaas (talk) 22:22, 28 May 2010 (UTC)

It's not encyclopaedic to know the exact quotes. Wikipedia is not lists of quotations (policy WP:NOTDIR). Other space craft entries do not have reaction lists. The list will not be included, just because there is "no consensus" and the norm here is not to have a reaction list for space craft.--PremKudva^Talk 05:02, 31 May 2010 (UTC)

Intro not clear on orbiter + impactor

Clarify in intro that there is an orbiter in addition to the impactor.

Also BTW update verbs to past tense for impactor. —Preceding unsigned comment added by 76.202.196.134 (talk) 06:39, 16 November 2008 (UTC)

The Impact Probe was attached to orbiter and it successfully crash landed (according to the plan) and took the pics of them moon's surface and also it had Indian flag painted on it at all four sides, so it has put india into elite club of four nations (USA, JAPAN, EU, USSR) in fact if you consider individual efforts of single nation then it put india into elite club of 2 nations (JAPAN, USA) so now that makes (JAPAN, USA, INDIA)—Preceding unsigned comment added by 117.200.96.189 (talk) 01:37, 21 November 2008 (UTC)

Is it only an orbiter? or It includes something else? —Preceding unsigned comment added by 122.164.40.117 (talk) 15:07, 28 July 2010 (UTC)

Spamming

Have deleted the following sentence which appeared at the bottom of the /*Objectives*/ section: "This shipi is an Honor to the supreme librarian Brandon Balwant, since he is indian in his human life he is very honour and is very facinated, All hail the plaideans" Seems to have been some attempt at nonsensical spamming. The guy who typed this (talk) 07:09, 16 November 2008 (UTC)

Pronunciation

Any chance someone could tell us how to pronounce this word? Or better, give us a link to a .WAV file that we can play to hear the word spoken? —Preceding unsigned comment added by 68.200.109.206 (talk) 07:35, 16 November 2008 (UTC)

Chan-dra-yaaaaan. —Preceding unsigned comment added by 117.200.96.189 (talk) 20:08, 20 November 2008 (UTC)

There seems to be something wrong with the audio file for the pronunciation that is now in the article. I only hear a short click — then the file stops about after the first third of its length. I use a rather exotic Linux version, but am able to hear other such files. Can anybody figure out what might be going on, here, and, maybe, fix the bug? --Hans Dunkelberg (talk) 23:13, 22 June 2011 (UTC)

Thanks for pointing that out, the audio seems to have got corrupted. No idea how that could have happened. I will upload a new version soon.--PremKudva^Talk 11:18, 24 June 2011 (UTC)

Great, thank You for that, already now. I am curious. --Hans Dunkelberg (talk) 12:14, 24 June 2011 (UTC)

That is Hindi version.Real version should be ChandraYaana.

PSLV XL or C11

Further to Lihaas request to talk about my reverting of PSLV XL to PSLV C11. For starters based on cited references I had kept the name of the launch vehicle as PSLV XL reverting mentions of C11. Later the desig C11 seems to crop up everywhere including on ISRO pages. On seeing the pre-launch image of the PSLV on the ISRO gallery page the designation C11 is on the PSLV and not XL. So while ISRO did mention XL early on, all later references only say C11. This was the reason to revert all occurances of XL to C11. Ie to say a total of two.--PremKudva^Talk 04:39, 17 November 2008 (UTC)

C11 was referenced as XL incorrectly before because in previous versions of PSLV, the Strap on motors were of less capacity, so referencing new Large scaled strap ons it became XL. At the end, ISRO needs to give a final document for authorization to government. After that it became C11. --Anuraag Vaidya 21:30, 23 November 2008 (UTC)

Removing subsections in space flight section

Further to Lihaas request to talk about merging the subsections in section Space flight. I had created the subsections ie First Orbit Burn etc. in the first place during the duration of the space flight since edits of the growing section was getting to be a little difficult.

After the conclusion of the space flight this section could once again be merged into one section. Since it had shrunk with the removal of a lot of redundant and recurring information by editors to make it more current. This includes removal of recurring occurrences of 440 Newton Engine, etc.

Regarding removal of reactions in MIP landing I have already spoken above on this talk page.--PremKudva^Talk 04:48, 17 November 2008 (UTC)

I removed the section claiming that the MIP fired solid rocket motors to slow its descent since I have seen no citations evidence that happening. I have been unable to find the precise sequence of events for the MIP descent described anywhere, however what I understand is that it has a retro-rocket to slow its orbital velcity (not to "slow its descent"), thus entering a lunar impacting trajectory. It is incorrect to claim that it "soft-landed" since that is a significantly more difficult challenge than merely impacting. —Preceding unsigned comment added by 82.169.8.110 (talk) 16:08, 8 November 2009 (UTC)

Clarifications

"India launched the spacecraft by a modified version of the PSLV C11[1][4]" to "India launched the spacecraft by a modified version of the PSLV, PSLV C11[1][4]" - the modified version of PSLV. PSLV-C11 is specific reference to the launcher used.
Instead of saying Non-Indian, I have called it "Payload from Other Countries" and changed Indian to Indian Payloads
Reduced the number of links - linking to Chandryaan 1 updates page, image gallery, NASA NSSDC webpage and link to the Frontline special series on Chandrayaan 1.

Prad2609 (talk) 09:02, 11 June 2009 (UTC)Pradeep

Criticism

I can only find vague references to critics of the mission. A quick google search with chandrayaan + critic turns up good sources but with no attribution to specific people. Still one important thing is that ISRO Chairman G. Madhavan Nair himself has tried to defuse the criticism.

http://www.hindu.com/thehindu/holnus/000200811131461.htm

http://www.hindu.com/thehindu/holnus/000200810211411.htm

http://ibnlive.in.com/news/over-the-moon-isro-chief-dismisses-criticism/78203-11.html

http://in.reuters.com/article/topNews/idINIndia-41007420090713?sp=true - small reference on chandrayaan. but anyway it is too recent compared to the other items happening circa launch. MrAronnax (talk) 10:07, 6 August 2009 (UTC)

Rise in spacecraft temperature

The section "Rise in spacecraft temperature" doesn't sound right. "The spacecraft was experiencing these high temperatures because it was over the sunlit side of the Moon, where it was receiving energy both from the Sun and infrared radiation given off by the Moon." If Chandrayaan was in an approximately two-hour orbit, then in every two hours it would be sunlit for a little over an hour and in darkness for a little less than an hour. Designers should also have anticipated and designed for this situation. Can this be clarified? -- 201.19.168.166 (talk) 01:30, 31 August 2009 (UTC)

All info is as reported. ISRO has not given any reason why this was not taken into count. So it looks pretty obvious that the space craft design didn't taken into count the excessive temperatures face by the space craft. And by not doing so the space craft was bound to fail. The reason for raising the altitude to 200m from 100m was also not satisfactorily explained in ISRO's reason. So it looks obvious that the alt increase was to prevent the space craft from over heating. By that they did prolong the life of the space craft, but at the cost data collection. Since the camera resolution at 200m would obviously have degraded the image quality.--PremKudva^Talk 06:01, 31 August 2009 (UTC)

Regarding section Mission Ended

As per DD News India current telecast at 7:20 a.m. IST, I have just heard of chandrayaan-1 having discovered water on the moon. The news can also be confirmed using TOI's online http://timesofindia.indiatimes.com/news/india/Indian-scientists-rejoice-as-Chandrayaan-1-traces-water-on-moon/articleshow/5049459.cms

I've updated the following to the main article [2] request to update the article. BalanceΩrestored ^Talk 02:03, 25 September 2009 (UTC)

I've again rephrased the sentence [3], it is still unclear, when DD News presented the details it possibly did not talk about finding from old data etc. I will watch the news again and update about the news briefing. As per TOI "We have received loads of data from moon via our mission. It has certainly enriched the global scientific community". But, the briefing from DD created confusion. Could be I heard it halfway.BalanceΩrestored ^Talk 02:26, 25 September 2009 (UTC)

Rupee symbol

May I suggest using "Rs." instead of the rupee image? In general, I'm averse to using images where the unicode glyph or plaintext will suffice, and considering the glyph hasn't been adopted into most fonts yet, the plaintext seems better for accessibility. SamuelRiv (talk) 18:49, 4 October 2011 (UTC)

Removed this

Hi all, I removed this, as the only source is a astronomy club blog that does not quote its sources.

"The main culprit is said to be the failure of onboard DC-DC Converter manufactured by MDI Power U.S.A.^[1] The converters failed to meet the radiation specifications for the intended mission time." Poobar (talk) 13:12, 8 August 2012 (UTC)

References

^ Chandrayaan (2 August 2011).

Author varies MASS which is constant by def.

[SPECS]QUOTE Mass 1,380 kg at launch, 675 kg at lunar orbit ... [UNQUOTE] — Preceding unsigned comment added by 69.126.50.234 (talk) 21:14, 3 November 2012 (UTC)

At launch, the orbiter sits with lots of hydazine fuel and disposable elements, so its mass is lower while in orbit. BatteryIncluded (talk) 21:18, 3 November 2012 (UTC)

Crash prediction

Re BatteryIncluded's re-revert: Physics is not that trivial. Since the Earth's atmosphere is a dynamic system that can not be perfectly predicted, a predicted lifetime of 1,000 days does not mean that the craft must have crashed at that exact date in late 2012. The Indians already badly mis-predicted the spacecraft's temperature in lunar orbit, after all...

I would expect a 2012 crash to have been noticed by terrestrial telescopes (or other lunar observation satellites) and reported; a lunar crash can make for interesting science if nothing else. Since I didn't find any such reports, I don't like giving the 2012 crash claim as a fact in the article. --Roentgenium111 (talk) 11:43, 6 October 2014 (UTC)

It was supposed to crash in late 2012, no specific date is mentioned. There is no debate on whether it crashed or not in 2012, but if you demand an exact date, I don't think you will get one. The Indians publish their successes with much joy, not their satellites' disposal. Feel free to edit the article using the references we got, I'll give you room. Cheers, BatteryIncluded (talk) 15:12, 6 October 2014 (UTC)

What I meant by "exact date" was that we can't even be sure that the crash did happen in late 2012; apart from "1,000 days" probably being rounded to an unknown number of valid digits, the estimate may easily have been off by a few hundred days or more. And most terrestrial telescopes (and all remaining lunar satellites) are not Indian, so they'd have no inhibition to publish a crash. I'd prefer to revert to my version, to be honest. Or we should look for other sources that are more reliable than an Indian economy newspaper... --Roentgenium111 (talk) 16:12, 6 October 2014 (UTC)

Still in orbit as of October 2016:

https://www.jpl.nasa.gov/news/news.php?release=2017-062&rn=news.xml&rst=6769

IPA

I have added an IPA pronunciation for "chandrayaan" please could someone check if it is right.Bodha2 (talk) 15:23, 15 June 2015 (UTC)

[1] Chandrayaan (2 August 2011).

[1]