Search found 426 matches

by sumishi
04 Nov 2008 19:18
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

BTW.. y2no is a highly respected website and calculations are accurate. There is always a gap ( at least a day ) between the orbital measurements carried out by the satellite operator ( ISRO in CY case ) and published in public domain in sites such as y2no and celestrak. It is not intentional but t...
by sumishi
04 Nov 2008 16:22
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Any ideas why the originally planned apogee of 386,194 km (overshooting the moon's orbit?) has been reduced to 380,000 km (undershooting!!) ... Add to that the FOURTH dimension: TIME Spacecraft takes finite time to travel and so although you may command it to point to moon you have to consider the ...
by sumishi
04 Nov 2008 15:21
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

p_saggu wrote:......
Meanwhile, from ISRO's website itself:
Image


Any ideas why the originally planned apogee of 386,194 km (overshooting the moon's orbit?) has been reduced to 380,000 km (undershooting!!)
by sumishi
04 Nov 2008 11:16
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

prashanth wrote:Congrats ISRO :D . A great anxiety has been removed. Things are probably easier ahead.

I think the lunar capture is the most critical part of the mission.
by sumishi
04 Nov 2008 10:30
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

It is a question of sensor fidelity (or sensitivity) and need. Note that ability to sense all regions of the spectrum is different from the ability to discriminate between them. Let me explain.... The HySI captures 80m resolution imagery in visible & near- IR bands (64 contiguous) ... Thanks la...
by sumishi
04 Nov 2008 01:11
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

From ISRO's site -- "The Terrain Mapping Camera (TMC): The aim of this instrument is to completely map the topography of the moon. The camera works in the visible region of the electromagnetic spectrum and captures black and white stereo images." Why is it that the camera, in spite of bein...
by sumishi
02 Nov 2008 23:15
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

SSridhar wrote:
sumishi wrote:Does this high orbital speed, at such a distance, make sense?

No.

Thanks SSridhar! So n2yo's datapoints may be in, but calculations are still faulty. :)
by sumishi
02 Nov 2008 22:50
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Chinese media questions Chandrayaan's success Just now checked the n2yo website which is mentioned in the article, and is being brandished by the Chinese. As mentioned in this forum earlier by one of the posters that there was a discrepancy between what ISRO releases about CY's orbit, and the orbit...
by sumishi
02 Nov 2008 22:34
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Chinese media questions Chandrayaan's success Just now checked the n2yo website which is mentioned in the article, and is being brandished by the Chinese. As mentioned in this forum earlier by one of the posters that there was a discrepancy between what ISRO releases about CY's orbit, and the orbit...
by sumishi
02 Nov 2008 08:46
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

I can also photoshop the image of moon and boost the saturation to give "clues" ... will it be scientifically acceptable? Will it be useful? It is basically a pretty picture [and confirmation of] what we already know! Not what we want to know. Will it give for example the Iron mineral dis...
by sumishi
01 Nov 2008 23:14
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Put it this way, we as humans have gone to moon, but we do not know the mineral distribution of moon!! Here is an interesting link - [ The Colors of the Moon ] from Russell Croman Astrophotography, which says: Is the moon really this colorful? In a way, yes. The lunar surface actually does have qui...
by sumishi
01 Nov 2008 13:27
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

From "Apollo in Perspective - Spaceflight Then and Now" by Jonathan Allday: About four hours and two orbits later the service module engine was fired again to circularize the orbit ... at 100 km by 120 km. Interestingly this was a very well designed orbit as the variations in the Moon's gr...
by sumishi
31 Oct 2008 22:18
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

“We could have done it one shot, but there is a possibility of missing the moon,” said M. Annadurai, Project Director of Chandrayaan-1 to this Correspondent. “So we have adopted an incremental increase in the orbits’ perigee.” Way to go!! They are doing it real carefully unlike the US/Russians pots...
by sumishi
31 Oct 2008 20:16
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

SSridhar wrote:One at 9k Km and the other at 70k Km which is twice the altitude of the METSAT.


Beautiful photographs!! Can't believe they are from our very own spacecraft, and not from those of the West. :)
I already have the 70K km one as desktop wallpaper.
by sumishi
31 Oct 2008 17:39
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully


Yeah sorry! Copied the wrong page link
by sumishi
31 Oct 2008 17:33
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Chandrayaan-1 Camera Tested. Working Fine
http://isro.org/pressrelease/Oct29_2008.htm
Cheers!
by sumishi
31 Oct 2008 16:09
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

ok, give it a break. :) Thanks moderator! Just for the record, I am myself leery of a lot of these conspiracy theories, except those which seem compelling. It is just recently that I came across this "neutral-point" stuff that i got worked up, since it has also been stated in Times magazi...
by sumishi
31 Oct 2008 00:39
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

sumishi, Please stop. How many people have to beg you? I dont want to warn you yet but will if I see one more post on this line of thought. There is the "newbie misc posts" thread if you want to pursue the line over there. Dont do it here. In fact I want you to delete all your posts here ...
by sumishi
31 Oct 2008 00:31
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Sumishi the guy who wrote the Moongate thing is a conspiracy theorist. Hi harbans, Thanks for your message. Well, that guy might be a "conspiracy theorist" (not all of them are wakos, actually, although some are :D), but does the Times Magazine also fall under the same category? Here's a ...
by sumishi
30 Oct 2008 21:43
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Hi sumishi, Please stop worrying. If moon's gravity is indeed 2/3 that of earth our scientists would have already observed the effect by now. It simply isn't. cheers! Hi Prashanth, Thanks for your cool reply. There is more to the Space politics than normal people know about - you will be absolutely...
by sumishi
30 Oct 2008 19:47
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Sumishi, Please don't be ridiculous. So you claim that you know the correct value of the moon's gravity, but ISRO doesn't? They can design and build launchers, a virtual zoo of highly sophisticated satellites, inject satellites into orbit with precision, build deep space networks ... but they don't...
by sumishi
30 Oct 2008 19:23
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Is anyone here aware that the moon's gravity is probably as high as 64% of Earth rather then 1/6th as we are taught in books? It can have implications for Chandrayaan's lunar orbital maneuver. The neutral point of the earth-moon system is about 38,000 miles from the moon. This can be used to calcul...
by sumishi
30 Oct 2008 11:43
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Is anyone here aware that the moon's gravity is probably as high as 64% of Earth rather then 1/6th as we are taught in books? It can have implications for Chandrayaan's lunar orbital maneuver. The neutral point of the earth-moon system is about 38,000 miles from the moon. This can be used to calcul...
by sumishi
30 Oct 2008 08:51
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Got this observation from another forum. As per this live tracking site Chandrayaan still have 300 KM * 37800 KM earth orbit. Is it supposed to be like this or this site is crap?? Any gurus on this? http://n2yo.com/?s=33405 The site deal with old data points, in my opinion. It is for satellite trac...
by sumishi
30 Oct 2008 00:09
Forum: Mil-Tech Archive
Topic: Chandrayan-1 moon mission
Replies: 1807
Views: 325777

Re: Chandrayan-1 mission launched succesfully

Is anyone here aware that the moon's gravity is probably as high as 64% of Earth rather then 1/6th as we are taught in books? It can have implications for Chandrayaan's lunar orbital maneuver. The neutral point of the earth-moon system is about 38,000 miles from the moon. This can be used to calcula...

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