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Thread: Chandrayaan-II mission

  1. #31
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    Quote Originally Posted by selvaarchi View Post
    Congratulations ISRO. Just finished watching the successful launching of the GSLV MK.3 carrying Chandrayaan 2. Good luck for the remaining part of the mission.

    https://www.youtube.com/watch?v=UtASNGj4Lao
    I'll second that congratulations ans wish for a successful touch down and rover deployment.

  2. #32
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    "SRO performs first orbit raising manoeuvre"

    https://www.hindustantimes.com/india...iOcg8ON6M.html

    Two days after Chandrayaan-2 lifted off, the Indian Space Research Organisation (Isro) performed the first orbit raising manoeuvre on Wednesday afternoon to help the spacecraft get closer to the moon, according to people familiar with the developments.

    For this, the on-board propulsion system was fired to increase the perigee, or the point on the orbit closest to Earth, from 170km to 230km, the people added.
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  3. #33
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    It is women power at work when India launched Chandrayaan-2. The project is led by Muthayya Vanitha and Ritu Karidhal, the project director and mission director, respectively.

    https://www.vice.com/en_in/article/7...ssion-to-space

    There were a few hiccups in the process, but India’s much-awaited space mission to the moon, Chandrayaan-2, has finally had lift-off. The launch, which happened on July 22, is monumental for a number of reasons, including the fact that, for the first time in Indian history, a space mission is spearheaded by two women.
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  4. #34
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    3rd orbit raising manoeuvre carried out successfully.

    https://www.isro.gov.in/chandrayaan2-latest-updates

    Third earth bound orbit raising maneuver for Chandryaan-2 spacecraft has been performed successfully today (July 29, 2019) at 1512 hrs (IST) as planned, using the onboard propulsion system for a firing duration of 989 seconds. The orbit achieved is 276 x 71792 km.
    All spacecraft parameters are normal.

    The fourth orbit raising maneuver is scheduled on August 2, 2019, between 1400 – 1500 hrs (IST).
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  5. #35
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    "Agreement between ISRO and NASA for cooperation on Chandrayaan-2 mission: "

    It is a 8 page pdf file.

    https://www.mea.gov.in/Portal/LegalT...S19B3558-1.pdf
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  6. #36
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    One of the experiments is a NASA retro reflector which was carried on Israel's lander.
    Chandrayaan-2 carries a total of 13 Indian payloads ó eight on the orbiter, three on the lander and two on the rover. In addition, the Vikram lander will tote one passive experiment from NASA called the Laser Retroreflector Array (LRA) for Lunar Landers.
    This LRA is the same design as the one carried aboard Israelís Beresheet moon lander, which crashed during its touchdown attempt in April.
    The LRA is a mirrored device that reflects laser signals to help mission team members pinpoint where a lander is as well as precisely calculate the moon's distance from Earth.
    From https://www.space.com/india-chandray...h-weekend.html

  7. #37
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    Quote Originally Posted by selvaarchi View Post
    3rd orbit raising manoeuvre carried out successfully.

    https://www.isro.gov.in/chandrayaan2-latest-updates
    India has carried out the 4th orbit raising manoeuvre successfully. Now only one more to go before going to the moon.

    https://www.hindustantimes.com/india...9axBXXPUI.html

    The Indian Space Research Organisation (ISRO) successfully carried out the fourth of the five planned orbit-raising manoeuvre of Chandryaan-2 in the Earth’s orbit on Friday afternoon. The space agency will be performing one more orbit-raising manoeuvre in the Earth’s orbit before the spacecraft enters into a trans-lunar path and begins its journey towards the moon.

    On Friday, the scientists fired the propulsion system on-board Chandrayaan 2 for 646 seconds at 3:27 pm and raised the orbit to 277 x 89,472 km. The manoeuvre was to increase the apogee or the farthest point from the Earth on the highly elliptical orbit.

    “All spacecraft parameters are normal,” said ISRO in a statement.
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  8. #38
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    In a few hours Chandrayaan-2 will move from a earth orbit, to go to a moon orbit. Good luck ISRO.

    https://www.hindustantimes.com/india...gumlR41RM.html

    In a crucial move on Wednesday early morning,Indian Space Research Organisation (ISRO) scientists will send the Chandrayaan-2 hurtling towards the moon. The spacecraft, which is currently revolving in a highly elliptical orbit around the Earth, will be injected in a trans-lunar path to cover most of the 384,400-km distance between the Earth and the moon.

    The manoeuvre will raise the orbit to approximately 266x413,623 km and will happen between 3am and 4am when Chandrayaan-2 nears the highest point in the elliptical orbit around Earth.

    “After launching Chandrayaan-2 on July 22, we did five manoeuvres. The Chandrayaan-2 composite body, including the orbiter, lander, and rover,is now revolving around the Earth. At around 3.30 am on August 14, we are going to have a manoeuvre called trans-lunar injection. By this manoeuvre, the Chandrayaan-2 will leave the Earth and move towards the moon,” said ISRO chairperson Dr K Sivan.

    The spacecraft will stay in this path for seven days before being inserted into an orbit around the moon on August 20.
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  9. #39
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    Quote Originally Posted by selvaarchi View Post
    In a few hours Chandrayaan-2 will move from a earth orbit, to go to a moon orbit. Good luck ISRO.

    https://www.hindustantimes.com/india...gumlR41RM.html
    Success - it is now in Lunar Transfer Trajectory. Come the 20th of August, it hopes to enter lunar orbit. Go ISRO gp.

    https://www.isro.gov.in/update/14-au...fer-trajectory

    The final orbit raising manoeuvre of Chandrayaan-2 spacecraft was successfully carried out today (August 14, 2019) at 02:21 am IST. During this maneuver, the spacecraft's liquid engine was fired for about 1203 seconds. With this, Chandrayaan-2 entered the Lunar Transfer Trajectory. Earlier, the spacecraft’s orbit was progressively increased five times during July 23 to August 06, 2019.

    The health of the spacecraft is being continuously monitored from the Mission Operations Complex (MOX) at ISRO Telemetry, Tracking and Command Network (ISTRAC) in Bengaluru with support from Indian Deep Space Network (IDSN) antennas at Byalalu, near Bengaluru. Since its launch on July 22, 2019 by GSLV MkIII-M1 vehicle, all systems onboard Chandrayaan-2 spacecraft are performing normal.

    Chandrayaan-2 will approach Moon on August 20, 2019 and the spacecraft's liquid engine will be fired again to insert the spacecraft into a lunar orbit. Following this, there will be further four orbit maneuvers to make the spacecraft enter into its final orbit passing over the lunar poles at a distance of about 100 km from the Moon’s surface.
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  10. #40
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    It is now in Lunar orbit. Congratulations ISRO. Now for the crucial step of putting the rover on the moon intact. Good luck ISRO.

    https://www.isro.gov.in/update/20-au...rbit-insertion

    Lunar Orbit Insertion (LOI) maneuver was completed successfully today (August 20, 2019). The duration of maneuver was 1738 seconds beginning from 0902 hrs IST. With this, Chandrayaan-2 was successfully inserted into a Lunar orbit. The orbit achieved is 114 km x 18072 km.

    Following this, a series of orbit maneuvers will be performed on Chandrayaan-2 spacecraft to enable it to enter its final orbit passing over the lunar poles at a distance of about 100 km from the Moon’s surface.

    Subsequently, the lander will separate from the Orbiter and enters into a 100 km X 30 km orbit around the Moon. Then, it will perform a series of complex braking maneuvers to soft land in the South polar region of the Moon on September 7, 2019.
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  11. #41
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    "Chandrayaan 2 Closer To Moon Landing After Second Orbit Move Today"

    https://www.ndtv.com/india-news/chan...s-isro-2088236

    India's moonshot Chandrayaan 2 today successfully performed a critical manoeuvre that lasted about 20 minutes as it flew closer to the lunar surface, the Indian Space Research Organisation said.
    The Chandrayaan 2 spacecraft entered the moon's orbit on Tuesday morning after executing one of the trickiest manoeuvres on its historic mission.

    The next manoeuvre in the lunar orbit is on August 28, ISRO said.

    "Second Lunar bound orbit manoeuvre for Chandrayaan 2 spacecraft was performed successfully today," ISRO tweeted.
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  12. #42
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    Congratulations to the ISRO!

  13. #43
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    1st picture of the moon taken by Chandrayaan 2.

    https://www.hindustantimes.com/india...cDOCFleRJ.html

    Chandrayaan-2 on Thursday beamed the first image captured by the Vikram Lander after it entered the lunar orbit earlier this week. The image was taken at a height of about 2650 km from lunar surface.

    Mare Orientale basin and Apollo craters are identified in the picture.
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  14. #44
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    Quote Originally Posted by selvaarchi View Post
    1st picture of the moon taken by Chandrayaan 2.

    https://www.hindustantimes.com/india...cDOCFleRJ.html
    Do you know if this is the near or far side of the Moon?

  15. #45
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    Quote Originally Posted by bknight View Post
    Do you know if this is the near or far side of the Moon?
    Far side -see here for more info.
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  16. #46
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    Quote Originally Posted by selvaarchi View Post
    Far side -see here for more info.
    Thanks.

  17. #47
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    More pictures of the moon taken by Chandrayaan-2.

    https://www.hindustantimes.com/india...mtQ97v7uN.html

    Chandrayaan-2, which is currently orbiting the Moon, has captured some more images of the lunar surface showing several craters, the Indian Space Research Organisation said on Monday Sharing the pictures, the ISRO said in a statement that the photos captured by the lunar spacecraft are those of craters Somerfeld, Kirkwood, Jackson, Mach, Korolev, Mitra, Plaskett, Rozhdestvenskiy and Hermite.

    These craters have been named after great scientists, astronomers and physicists.
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  18. #48
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    "Third lunar bound orbit maneuver for Chandrayaan-2 performed successfully: ISRO"

    https://in.news.yahoo.com/third-luna...053005288.html

    The third lunar bound orbit maneuver for Chandrayaan-2 spacecraft was performed successfully on Wednesday using the onboard propulsion system, ISRO stated.

    The lunar bound orbit maneuver began at 9:04 hrs (India Standard Time). The orbit achieved is 179 km x 1412 km, ISRO added.

    The space agency stated that all spacecraft parameters are normal and the next lunar bound orbit maneuver is scheduled on August 30 between 6-7 pm.
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  19. #49
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    "Chandrayaan 2 completes fourth lunar orbit manoeuvre: What next?"

    https://indianexpress.com/article/in...-next-5953421/

    The mission has a few more milestones to cross before the Lander and Rover components of the spacecraft, called Vikram and Pragyaan respectively, make a soft landing on the Moon’s surface on September 7, 2019.

    After successfully performing its fourth lunar orbit manoeuvre on Friday, Chandrayaan-2, India’s first lunar lander mission, is a step closer to the moon. The Chandrayaan-2 will now go through one final orbit manoeuvre. This next lunar orbit manoeuvre is scheduled to be performed on Sunday, September 1 between 18:00-19:00 hours IST. The spacecraft has reached into an orbit that is 124 km from the lunar surface at its nearest point, and 164 km at the farthest.
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  20. #50
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    The lander separated from orbiter 1-2 days ago. The lander has now performed its first de-orbiting maneuver prior to Sept 7 landing.

    https://www.isro.gov.in/update/03-se...iting-maneuver

  21. #51
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    "Chandrayaan 2 completes final de-orbital operations, all set for moon landing"

    https://www.hindustantimes.com/india...eBZgKB1SN.html

    Chandrayaan 2: According to the Indian space agency ISRO, Vikaram’s second de-orbital operations began at 3.42 am using the on-board propulsion system and was completed in nine seconds.

    After a 9-second manoeuvre in the wee hours of Wednesday, Chandrayaan 2’s Vikram lander is in place to attempt a landing on September 7 at 01:55 am.

    “With this manoeuvre, the required orbit for the Vikram lander to commence its descent towards the surface of the moon is achieved. The lander is scheduled to a powered descent between 0100 - 0200 hours IST on September 07, 2019,” said a statement from the Indian Space Research Organisation (ISRO).

    This was the second de-orbiting manoeuvre to bring the Vikram lander into a planned lower orbit of 35x101 km orbit at 03:42 am. This intermediary orbit between the nearly 100x100 km orbit planned for the Orbiter was suggested by a group of eminent scientists in 2018, while reviewing the mission.
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  22. #52
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    "Here’s how you can watch India’s Chandrayaan-2 landing on the Moon"

    https://qz.com/india/1701452/how-to-...isro-in-india/

    Here’s how you can watch the landing live: ISRO will telecast the updates on its website, isro.gov.in from its control room at the Satellite Control Centre (SCC) in Bengaluru. The same will stream on the press information bureau of India’s YouTube channel, too. For minute-by-minute updates, you can track ISRO’s Twitter handle.

    Besides, National Geographic yesterday (Sept. 3) announced it will also cover the launch. In connection with this, the TV channel is also bringing in NASA astronaut Jerry Linenger, who will share his experiences in space with the audience on an exclusive chat show.
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  23. #53
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    Here's a description of the landing site.
    https://www.space.com/india-chandray...n=20190905-sdc

  24. #54
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    Seems like the lander lost contact at +/- 2.1 KM above surface and the data after communication was restored is being analyzed. I'm switching off and will check back later.

  25. #55
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    --from NASASPACEFLIGHT

    "Vikram lander descent was nominal and as planned up to an altitude of 2.1 km. Subsequently, the communications with the lander were lost. Data is being analyzed."

  26. #56
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    Not good news but some hope still there.
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  27. #57
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    Sigh.

    A successful moon landing seems to be a benchmark of space exploration legitimacy. It is not. But India is disappointed today.

    I hope this only energizes its determination in space exploration.

  28. #58
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    India's moon lander has been located. ISRO is trying to establish contact with it.

    https://www.deccanchronicle.com/nati...sro-chief.html

    Indian Space Research Organisation (ISRO) Chief K Sivan on Sunday said that Chandrayaan 2 lander located on moon’s surface and the ground station is working to establish contact.

    "We've found the location of Vikram lander on lunar surface and orbiter has clicked a thermal image of lander. But there is no communication yet. We are trying to have contact. It will be communicated soon," said ISRO chief to new agency ANI.
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  29. #59
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    Disappointing. I do not think there is anything possible unless some miracle happen which makes communication on lander go green.

  30. #60
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    I suspect that, while it's in one piece, Vikram hit hard enough to damage any number of important internal components, likely all of them. As a test of lunar lander technologies it's shown that a lot of things work and the lander design has no fundamental flaws. More importantly it's shown there's still important things they need to learn. But as a science mission.... Well we still have the orbiter, and that's got a lot of good science still ahead of it.

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