Author Topic: Chandrayaan-2 GSLV MkIII - NET July 2019  (Read 182796 times)

Offline sanman

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Re: Chandrayaan-2 GSLV MkIII mid-February 2019
« Reply #380 on: 01/11/2019 11:48 am »
I thought they said the launch window is only open until March - how can April be feasible?

If they can't make the launch window, then when does the next window occur?

Offline Phillip Clark

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Re: Chandrayaan-2 GSLV MkIII mid-February 2019
« Reply #381 on: 01/11/2019 12:25 pm »
What parameters are defining the launch window?
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Online Salo

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Re: Chandrayaan-2 GSLV MkIII mid-February 2019
« Reply #382 on: 01/11/2019 12:28 pm »
https://economictimes.indiatimes.com/news/science/chandrayaan-2-mission-planned-for-middle-of-april-isro/articleshow/67484715.cms
Quote
"Regarding Chandrayaan-2 schedule, right now Chandrayaan is scheduled from March 25 to April end. Most probably, the normal targeted date is April middle," Sivan told reporters here.
https://economictimes.indiatimes.com/news/science/watch-isro-chief-briefs-media-on-chandrayaan-2-indias-mission-to-mars/videoshow/67484120.cms

Offline sanman

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Re: Chandrayaan-2 GSLV MkIII mid-February 2019
« Reply #383 on: 01/11/2019 12:30 pm »
What parameters are defining the launch window?

I assume it's the ability to land at the target site at the end of the lunar night, so that the full span of the lunar day period can be used for the mission, before it freezes and goes offline.

Offline chetan_chpd

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #384 on: 01/18/2019 01:54 pm »
Chandrayaan-2
1. Mission postponed till April (-May?).
2. Reasons: to increase robustness, reconfigure the lander, All systems needs re-development (?), requires tests.

(ISRO chairman press conference highlights
https://www.chetansindiaspaceflight.com/2019/01/news-update-isro-chairman-press.html)

Offline worldtimedate

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #385 on: 01/20/2019 05:42 am »
ISRO looking to land rockets on runways

Quote
According to Sivan, the much-delayed launch of Chandrayaan-2 - India's lunar lander - is now scheduled for March-April this year. The launch, originally scheduled for last April, was delayed as the spacecraft had to be reconfigured to bring in more redundancy to ensure safety as recommended by experts, he said.

Online zubenelgenubi

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #386 on: 01/20/2019 10:00 pm »
Apologies if this was addressed up-thread or elsewhere on the forum...

Would not a fundamental change of LV require at least some re-testing of the payload towards re-certification for launch:
For example--vibrational/acoustical testing?

That would explain some of the delay?
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Offline chetan_chpd

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #387 on: 01/28/2019 05:08 am »
source: ANI/IDRW

PM Modi said, "We will soon register India’s presence on the Moon through the Chandrayaan-2 campaign" during his monthly radio address to the nation.

can we safely assume that there wont be any more delays in launch of the mission? since PMO should have taken inputs from ISRO before drafting this speech...

(https://www.chetansindiaspaceflight.com/2019/01/news-update-pm-modi-on-indias-moon.html)

Offline smoliarm

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #388 on: 01/28/2019 06:48 am »
...

can we safely assume that there wont be any more delays in launch of the mission?
...
IMHO, no.

Delay is always an option,
and
Delay is infinitely better than failure.

Offline Phil Stooke

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #389 on: 01/28/2019 06:50 am »
Also, he only said 'soon', which is not very precise.

Online Steven Pietrobon

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Re: Chandrayaan-2 GSLV MkIII - March 25 to mid April 2019
« Reply #390 on: 01/29/2019 08:45 am »
Delay is always an option,
and
Delay is infinitely better than failure.

As long as the delay is not infinite. :-)
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline chetan_chpd

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #391 on: 01/30/2019 10:18 am »
News update: Chandrayaan-2 launch by April end- K.Sivan

1. ISRO chairman K.Sivan confirmed Chandrayaan-2 launch by April end
2. he told this to press on Tuesday on the sidelines of Space Symposium at Pune
3. the decision of launch has been finalized
4. testing phase underway, will be ready by april end
5. around 3290 kg weight of the spacecraft
6. budget: 800 crore INR (approximately 112 million USD)
7. director of physical research lab, Mr. Anil Bhardwaj gave a presentation on Chandrayaan-2 at the symposium
8. orbiter would circle the moon "on a 100 km high orbit"
9. report mentions 3D mapping of lunar geography, studying composition of rocks, exosphere, testing new technologies for "future missions"

(https://www.chetansindiaspaceflight.com/2019/01/news-update-chandrayaan-2-launch-by.html)
« Last Edit: 01/30/2019 10:19 am by chetan_chpd »

Offline chetan_chpd

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #392 on: 02/06/2019 03:41 am »
source: https://timesofindia.indiatimes.com/india/isros-gsat-31-launched-from-french-guiana-to-replace-dying-insat-4cr-sat/articleshow/67859945.cms

K Sivan- chairman, ISRO said, "we are using the services of Arianespace as it is an emergency (today's GSAT-31 launch)***
our MK III rockets are already booked for Chandrayaan-2 and other important missions"

looks like CH-2 is on schedule for April launch :D :D :D

Offline TheVarun

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #393 on: 02/06/2019 12:58 pm »
^
There are many people who ask naively  why ISRO is using the services of Arianespace when it has the GSLV.  It's about availability, quickness of turnover, weight of satellite,etc. Ariane will be needed for years to come. Perhaps by 2021 or 2022 end, ISRO will be fully self-reliant in this regard.

Offline PM3

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #394 on: 02/16/2019 01:41 am »
Currently planned for end of April, at the end of the six weeks launch window.

https://timesofindia.indiatimes.com/city/pune/chandrayaan-2-set-for-launch-by-april-end/articleshow/67746542.cms

Offline chetan_chpd

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #395 on: 02/18/2019 04:47 am »
source: the hindu

A national review committee to meet for the first time in Bengaluru (March 5 and 6) to comprehensively discuss on details of Gaganyaan project.

The committee will also be briefed on the lunar lander and rover mission, Chandrayaan-2.

Offline sanman

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #396 on: 03/05/2019 07:53 pm »
Why can't we have some kind of tiny data archive carried aboard our lander for it to take to the surface of the Moon, for the sake of posterity? The SpaceIL lander has one, based on technology from Arch Foundation, as a tiny crystal with data etched into it. This data archive is tiny in mass, but rich with information from Israel's cultural heritage. Likewise, the Voyager space probes famously had information about Earth & humanity stored on them. Why can't we do some of these things, especially if it doesn't involve any substantial mass penalty?

When ISRO came up with the idea to send Chandrayaan-1 to the Moon, it took an extra nudge from President Kalam, himself a veteran rocket scientist, to suggest the inclusion of the Impactor probe. He had the sagacity to recognize that if you're taking the trouble to go all the way to the Moon, them you may as well touch its surface too.

If we're taking the trouble to land something on the surface of the Moon, then why not include a data repository for the sake of posterity? How difficult could it be?


Offline Phil Stooke

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #397 on: 03/05/2019 11:37 pm »
I agree with you, but the time to ask this question was 5 years ago.  Now there isn't enough time to even design an archive, let alone make it and integrate it into Chandrayaan 2 before launch next month.  But maybe you should present this idea to Team Indus.  Their first launch with OrbitBeyond is currently planned for 2020, so you have more time to get it going.  And they are looking at a series of landers in future, so any one of them might be a suitable host for your archive.  But Chandrayaan 2 - way too late.
 

Offline worldtimedate

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #398 on: 03/26/2019 07:22 pm »
I thought that Chandrayaan-2 would carry only the Indian instruments unlike the Chandrayaan-1.  Now it appears that Chandrayaan-2 will carry NASA'S laser instruments.

Quote
India's lunar mission Chandrayaan 2, scheduled to launch next month, will carry NASA's laser instruments that allow scientists to make precise measurements of the distance to the Moon, according to the US space agency officials. During the Lunar and Planetary Science Conference held at Texas, US last week, NASA confirmed that Chandrayaan 2 and Israeli lander Beresheet, due to touch down April 11, will each carry NASA-owned laser retroreflector arrays.

"We're trying to populate the entire surface with as many laser reflector arrays as we can possibly get there," Lori Glaze, acting director of the Planetary Science Division of NASA's Science Mission Directorate, was reported as saying by 'Space.com'. While five such instruments already exist on the lunar surface, they have some flaws, according to Simone Dell'Agnello, a physicist at the National Institute for Nuclear Physics National Laboratory at Italy.

Source : Chandrayaan 2 will carry NASA's laser instruments to Moon
« Last Edit: 03/26/2019 07:29 pm by worldtimedate »

Offline Phil Stooke

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Re: Chandrayaan-2 GSLV MkIII - NET April 2019
« Reply #399 on: 03/27/2019 03:10 pm »
"I thought that Chandrayaan-2 would carry only the Indian instruments unlike the Chandrayaan-1.  Now it appears that Chandrayaan-2 will carry NASA'S laser instruments."

This is a last-minute addition so all the previous statements were true when made.  And it's not actually an instrument, only a little mirror.  The laser is on Earth (or possibly in future on an orbiting spacecraft).  NASA is keen to get as many of these on the Moon as it can, as they say in the release.  Look for reflectors on many of the CLPS missions as well.