Chandrayaan 1, India's First Lunar Probe |
Chandrayaan 1, India's First Lunar Probe |
Oct 23 2008, 04:38 AM
Post
#91
|
|
Junior Member Group: Members Posts: 75 Joined: 19-October 08 From: India Member No.: 4459 |
as per new Orbit Transfer Strategy (Chandrayaan-I) ...
Earth Bound Orbits 1. Elliptical orbit - Perigee: 255km, Apogee: 22,860km 2. Highly Elliptical orbit - Perigee: 300km Apogee: 160000km 3. Intermediate transfer orbit - Perigee: 300km Apogee: 2,60,000km 4. Extremely high elliptical orbit: Perigee: 300km Apogee: 3,87,000km 5. Extremely high elliptical orbit: Perigee: 2000km Apogee: 3,84,000km Moon Bound Orbits 1. Lunar orbit 1 - Perigee: 500km Apogee: 5000km 2. Lunar orbit 2 - Perigee: 100km Apogee: 5000km 3. Lunar orbit 3 - Perigee: 100km Apogee: 100km |
|
|
Oct 23 2008, 09:23 AM
Post
#92
|
|
Junior Member Group: Members Posts: 75 Joined: 19-October 08 From: India Member No.: 4459 |
Chandrayaan-1, India's first lunar orbiter, continued its long journey to the moon as operations planned by the
Indian Space Research Organisation scientists for raising its orbit went on satisfactorily on Thursday..... The health of the spacecraft is normal seems to be normal. The orbit-raising operations were carried out by scientists at ISRO's (ISTRAC) along with experts from ISRO centres. |
|
|
Oct 23 2008, 10:31 AM
Post
#93
|
|
Member Group: Members Posts: 118 Joined: 18-November 07 Member No.: 3964 |
as operations planned by the Indian Space Research Organisation scientists for raising its orbit went on satisfactorily on Thursday..... 'Satisfactorily'? Normaly the PR-folks prefer to say 'as planned', 'as expected' or something like that. I'm curious if there has been some minor anomalies during operations? |
|
|
Oct 23 2008, 10:35 AM
Post
#94
|
|
Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
These aren't western PR folks, though.
-------------------- |
|
|
Oct 23 2008, 11:35 AM
Post
#95
|
|
Founder Group: Chairman Posts: 14432 Joined: 8-February 04 Member No.: 1 |
English is a second language for the C1 team - and to be honest, I think they're doing an awesome job of it so far.
Doug |
|
|
Oct 23 2008, 11:44 AM
Post
#96
|
|
Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
Indeed. It's also probably a cultural difference thing.
-------------------- |
|
|
Oct 23 2008, 11:56 AM
Post
#97
|
|
Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
Ha!-I noticed this too. It makes you realise how we're twisting and mangling our own language. When exactly did 'satisfactory' come to mean 'just a whisker off disastrous'? Indeed it's refreshing to go to India or Pakistan and hear english words still being used properly.
|
|
|
Oct 23 2008, 12:05 PM
Post
#98
|
|
Member Group: Members Posts: 611 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
Why ISRO changed the orbit-transfer strategy - From Hindu The revised strategy will have five earth-bound orbits .... Increasing apogees ... To calibrate the systems etc.. First, thanks for posting these continued updates, Bhas. And congratulations. I am curious, though, why this was a 'revised strategy'. I mean, it's all very well to take things slow to do better orbit determination etc., but why not design that in from the start - what new information led to this 'revision' ? Was it just contact with the reality of doing the orbit determination, or something else ? |
|
|
Oct 23 2008, 12:49 PM
Post
#99
|
|
Junior Member Group: Members Posts: 75 Joined: 19-October 08 From: India Member No.: 4459 |
etc.. First, thanks for posting these continued updates, Bhas. And congratulations. I am curious, though, why this was a 'revised strategy'. I mean, it's all very well to take things slow to do better orbit determination etc., but why not design that in from the start - what new information led to this 'revision' ? Was it just contact with the reality of doing the orbit determination, or something else ? Thanks. Final Approval for Chandrayaan-II with 486 Crore given last week by Cabinet. Now, ISRO has a clear picture about future mission(s). This could be one reason. I will look for any further explanation about this from ISRO. |
|
|
Oct 23 2008, 01:16 PM
Post
#100
|
|
Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Do we have any idea of ISRO's policy concerning the release of images to the public? I hope we will have access to the Chandrayaan-1 images, because I'm a bit frustrated by the low rate of release of the Kaguya images, not to mention Chang-e. I wonder if that last probe is still doing its thing up there, because we haven't had news for a long time.
|
|
|
Oct 23 2008, 01:23 PM
Post
#101
|
|
Junior Member Group: Members Posts: 75 Joined: 19-October 08 From: India Member No.: 4459 |
Do we have any idea of ISRO's policy concerning the release of images to the public? I hope we will have access to the Chandrayaan-1 images, because I'm a bit frustrated by the low rate of release of the Kaguya images, not to mention Chang-e. I wonder if that last probe is still doing its thing up there, because we haven't had news for a long time. Have sent a mail to ISRO asking for these details yesterday. Hope to receive a positive reply. |
|
|
Oct 23 2008, 06:00 PM
Post
#102
|
|
Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
There's an update on the ISRO website stating they just raised the orbit to 37,900 km, which doesn't match your numbers, Bhas. Could you post links to where you're getting your information?
--Emily -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
|
|
|
Oct 24 2008, 03:25 AM
Post
#103
|
|
Junior Member Group: Members Posts: 75 Joined: 19-October 08 From: India Member No.: 4459 |
There's an update on the ISRO website stating they just raised the orbit to 37,900 km, which doesn't match your numbers, Bhas. Could you post links to where you're getting your information? --Emily Emily, http://in.rediff.com/news/2008/oct/23imoon2.htm - Bhas |
|
|
Oct 24 2008, 06:28 AM
Post
#104
|
|
Newbie Group: Members Posts: 11 Joined: 22-October 08 Member No.: 4463 |
There was a news item in Indian papers :
( Emily, ISRO website always gives a delayed reporting ) The LAM would be fired again on Friday (October 24) morning ( India time ) to take the spacecraft to an apogee of 73,000 km and a perigee of 300 km. Hopefully they have done it by now. Really speaking till this time it was in fact a more or less a routine launch of PSLV. ( PSLV has earlier launched satellites along equator apart from its intended application of Polar launches. Putting Chandrayaan in 305kms x 37900 kms is similar to a GTO transfer orbit. Such a maneuver was done earlier also using a PSLV ) ---------- - SSSalvi |
|
|
Oct 24 2008, 06:29 AM
Post
#105
|
|
Member Group: Members Posts: 118 Joined: 18-November 07 Member No.: 3964 |
Final Approval for Chandrayaan-II with 486 Crore given last week by Cabinet. 486 Crore rupees, is it ca $97 million? If only NASA and ESA could do so much with such a small budgets - what kind of planetary missions would we have right now... (warning: unconstructive dreaming mode turned on) |
|
|
Lo-Fi Version | Time is now: 25th May 2024 - 01:49 PM |
RULES AND GUIDELINES Please read the Forum Rules and Guidelines before posting. IMAGE COPYRIGHT |
OPINIONS AND MODERATION Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators. |
SUPPORT THE FORUM Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member. |