Chandrayaan2

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Hanif
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Hej ISRO är på gång med kicka iväg Chandrayaan-2 till månen men otydligt när
Skulle blivit av redan förra året Oktober men sen ändrats till Januari 2019 och nu April men hört nåt om nästa månad så vem vet när det blir av.

Ska försöka uppdatera så mycket som möjligt men vet just nu inte mycket vad som händer och fötter

 

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Hanif
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GSLV-Mk-III

 

PRESS RELEASE ON CHANDRAYAAN-2
Chandrayaan-2, India’s second lunar mission, has three modules namely Orbiter, Lander (Vikram) & Rover (Pragyan). The Orbiter and Lander modules will be interfaced mechanically and stacked together as an integrated module and accommodated inside the GSLV MK-III launch vehicle. The Rover is housed inside the Lander. After launch into earth bound orbit by GSLV MK-III, the integrated module will reach Moon orbit using Orbiter propulsion module. Subsequently, Lander will separate from the Orbiter and soft land at the predetermined site close to lunar South Pole. Further, the Rover will roll out for carrying out scientific experiments on the lunar surface. Instruments are also mounted on Lander and Orbiter for carrying out scientific experiments.
All the modules are getting ready for Chandrayaan-2 launch during the  window of July 09, to July 16, 2019, with an expected Moon landing on September 06, 2019.
https://www.isro.gov.in/update/01-may-2019/press-release-chandrayaan-2


ISRO har uppdaterat med ovan och kanske kan bli av nu mellan 9-16 juli och landning september 6.
Skuggade sidan av månen (south pole), nästan helt outforskad och extra spännande om ISRO lyckas. Massor med vatten kan finnas och mycket viktigt för framtida indiska månbaser, byar och städer. Bemanad resa till månen (Gaganyaan) nån gång 2021/2022.

 

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matsism
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WOW! Khoolt!

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… Är i Singapura. 

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Hanif
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Jepp hur coolt som helst. Dröjer nu inte länge förens man kan kliva in på indisk restaurang och beställa första Chai på månen.


 

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Hanif
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Benefits of Chandrayaan-2
https://www.isro.gov.in/update/15-may-2019/benefits-of-chandrayaan-2

Benefits of Chandrayaan-2

Uppdatering


 

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Henric
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Hur har det gått? Ingen uppskjutning? Eller är det inte lönt nu när valet redan varit?

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Hanif
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Får se om det blir av mellan 9-16 juli och landning september 6 eller om det ändras igen. Väntar nu på payload lista, totalt 14st, 13st indiska och nån "passive experiment" från nasa. Antar med "passive experiment" menas retroreflector/speglar som tidigare i februari/mars nämnts. Som forskare kan skjuta på med laser för mäta avstånd mellan jorden och månen.

 

 

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Hanif
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Uppdatering
https://www.isro.gov.in/update/03-jun-2019/challenges-of-moon-landing

The challenges of a Moon landing

Trajectory Accuracy
The distance to the Moon is approximately 3.844 lakh km. Ensuring trajectory accuracy while navigating such a large distance poses many challenges as trajectory is influenced by the non-uniform gravity of the Earth and Moon, gravitational pull of other astronomical bodies, solar radiation pressure, and the Moons true orbital motion.

Deep-space Communication
Owing to the large distance from Earth and limited on-board power, radio signals used for communication are weak with heavy background noise, which needs to be picked up by large antennas.

Trans Lunar Injection (TLI) and Lunar Capture
Chandryaan 2 will perform a series of TLI burns for raising its apogee successively to reach the vicinity of the Moon's orbit. As the Moon's location is continually changing due to orbital motion, the intersection of Chandrayaan 2 and the Moon's path has to be predicted sufficiently in advance with a high level of accuracy. As the Moon approaches the apogee of Chandrayaan 2, on-board thrusters fire precisely to reduce its velocity for lunar capture. The margin of error in these calculations and manoeuvres is very narrow.

Orbiting Around the Moon
Lunar gravity is 'lumpy' due to uneven mass distribution under its surface. This influences the orbit of the spacecraft. Also, precise knowledge of the thermal environment at orbital altitude is essential for keeping on-board electronics safe.

Soft Landing on the Moon
This is the most challenging part of the mission and is divided into 'rough braking' and 'fine braking'. Variation in local gravity has to be factored into the lunar descent trajectory. The onboard NGC and Propulsion System has to work in unison, autonomously, and automatically for a successful landing. Further, the landing site landscape features should not result in a communication shadow area.

Lunar Dust
The lunar surface is covered with craters, rocks, and dust. Firing of on-board engines close to the lunar surface results in backward flow of hot gases along with dust. Lunar dust is miniscule and is hard, barbed, and jagged. Its negative charge makes it stick to most surfaces, causing a disruption in deployment mechanisms, solar panel performance, and NGC sensor performance.

Extreme Temperatures and Vacuum
A lunar day or night lasts 14 Earth days. This results in extreme surface temperature variations. Moreover, the ambient pressure of the lunar surface is a hard vacuum. This makes the lunar surface an extremely hostile environment for lander and rover operations.

 

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Payloads

Orbiter

   

  • Terrain Mapping Camera 2 (TMC 2)
  • Chandrayaan 2 Large Area Soft X-ray Spectrometer (CLASS)
  • Solar X-ray Monitor (XSM)
  • Orbiter High Resolution Camera (OHRC)
  • Imaging IR Spectrometer (IIRS)
  • Dual Frequency Synthetic Aperture Radar (SAR)
  • Chandrayaan 2 Atmospheric Compositional Explorer 2 (CHACE 2)

Vikram

  •     Radio Anatomy of Moon Bound Hypersensitive ionosphere and Atmosphere (RAMBHA)
  •     Chandra's Surface Thermo-physical Experiment (ChaSTE)
  •     ChaSTE measures the vertical temperature gradient and thermal conductivity of the lunar surface. It
  •     Instrument for Lunar Seismic Activity (ILSA))

Pragyaan
 

  • Alpha Particle X-ray Spectrometer (APXS)
  • Laser Induced Breakdown Spectroscope (LIBS)

Passive Experiment

  • Laser Retroreflector Array (LRA)

 

Mer info / detaljer på: https://www.isro.gov.in/chandrayaan2-payloads

 

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Vikram Lander

 

Press Meet - Briefing by Dr. K Sivan, Chairman, ISRO https://www.isro.gov.in/update/12-jun-2019/press-meet-briefing-dr-k-sivan-chairman-isro
Dr Sivan outlined ISRO’s vision on space science and interplanetary missions. Understanding the secrets of the inner solar system is an aspiration of both national and international scientific community. Specifically talking about Chandrayaan-2, he announced “The launch of Chandrayaan-2 onboard GSLV MkIII-M1 is planned on July 15, 2019 at 02.51 Hrs from Sriharikota”. Further, he said the soft landing of the Vikram lander of Chandrayaan-2 on the Moon’s surface is likely to be on September 06, 2019. The briefing included the scientific objectives, challenges and benefits of the mission.
 

Kanske blir det av nu "July 15, 2019 at 02.51" från Sriharikota.

 

 

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© ISRO

© ISRO

July 4
Integration of encapsulated assembly of Chandrayaan-2 with launch vehicle completed.

July 5
Link checks for lander & orbiter from ground station in progress.
Vehicle phase 3 level 2A checks completed.

July 6
Launch vehicle ready for movement to launch pad

July 7
GSLV MkIII-M1 moved to launch pad.
Spacecraft is powered and health check in progress.

Bara en vecka nu kvar till countdown och Chandrayaan sparkas upp

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© ISRO

© ISRO

July 7
GSLV MkIII-M1 moved to launch pad.

July 10
Shroud final assembly completed.
Cryogenic stage (C25) On Board Elementary checks completed.
Liquid stage (L110) control system checks completed.

July 11
Launch Vehicle battery charging carried out.
Routine launch related checks in-progress.

Nu är det inte långt kvar. Tänk om det finns utomjordingar på månen?


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© ISRO - Vikram lander mounted on Chandrayaan-2 orbiter


© ISRO - Cryogenic upper stage engine


© ISRO - GSLV MkIII-M1

July 14
The launch countdown of GSLV MkIII-M1/Chandrayaan-2 commenced today at 0651 Hrs IST. The launch is scheduled at 0251Hrs IST on July 15th.

Propellant filling of Liquid stage (L110) of GSLV MkIII-M1 is in progress
Propellant filling of liquid core stage (L110) of GSLV MkIII-M1 completed

Nu är det bara timmar till launch, lokaltid 02:51.

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Hanif
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July 15
A technical snag was observed in launch vehicle system at T-56 minute. As a measure of abundant precaution Chandrayaan-2 launch has been called off for today. Revised launch date will be announced later.

Ingen uppskjutning idag verkar det som.

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Henric
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Japp, läste precis om det Sad
https://www.aljazeera.com/news/2019/07/india-moon-mission-launch-called-due-technical-problem-190714233550198.html

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Bara att vänta på ny uppskjutnings datum men kan ta dagar och veckor. Vem vet!
Stay tuned

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