Chandrayaan-2 : Updates

Gautam said:
Hmm............odd. For a second there DSN Madrid was receiving data from the lander.

View attachment 9905

Now it has disappeared. Madrid has lost LOS and Goldstone is tracking the orbiter.
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That's could mean the lander landed safely , and as I stated previously the comms might have failed due to malfunctioning of certain components , like battery drain or voltage spike
 
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hellbent said:
That's could mean the lander landed safely , and as I stated previously the comms might have failed due to malfunctioning of certain components , like battery drain or voltage spike
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Maybe or it could be a final burst of signal. If it really is just a battery drain then its not major. The solar panels should be able to conjure up enough power to recharge the batteries back to life. It only a matter of time.
However if it is more severe than that, then it becomes less likely to actually gain comms connection again. The orbiter should be able to provide sufficient information. Lets just hope for the best.
 
Gautam said:
Maybe or it could be a final burst of signal. If it really is just a battery drain then its not major. The solar panels should be able to conjure up enough power to recharge the batteries back to life. It only a matter of time.
However if it is more severe than that, then it becomes less likely to actually gain comms connection again. The orbiter should be able to provide sufficient information. Lets just hope for the best.
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No batteries are needed to deploy the solar panels and run pre deployment checks of antenna , solar panels etc
 
hellbent said:
No batteries are needed to deploy the solar panels and run pre deployment checks of antenna , solar panels etc
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Solar panels aren't deployed from the lander. That's the orbiter, the orbiter deploys the panels as the panels are stowed away before deployment. Lander has mounted panels, so the panel is in the same place irrespective of whether its functional or not.

But I suppose you are right, we would need some energy to kick start the panels and related electronics. This s*ks, but I do hope we see an increase in space related activities after this. If nothing else increased budget.
 
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could it be that charged dust particles rose up due to the blow from engine and surrounded the Lander creating a shield to deny electromagnetic communication.

Maybe in couple of days the dust settles down and Lander starts communicating. Possible :)
 
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Golden_Rule said:
could it be that charged dust particles rose up due to the blow from engine and surrounded the Lander creating a shield to deny electromagnetic communication.

Maybe in couple of days the dust settles down and Lander starts communicating. Possible :)
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I think it's more likely that the communication equipment was damaged during the final phases.
 
Let's assume lander crashed then what will be the velocity at which it crashed?

Using v=u+at and v=d/t and a=1.65m/s^2 (g of moon) I calculated velocity should be in range of 15-20 kmph (assuming freefall at 2km altitude)

I did this off the top of my head. Please correct me if your results differ.

I
Now how much damage can you expect ramming lander on surface at 15-20 kmph speed?
 
Chandrayaan 2 landing- ‘Vikram may have landed on moon, let’s wait for analysis’, says former Isro chief

Chandrayaan 2: The Vikram lander was planned to land on the far side of the moon between 1:30 am to 2:30 am on the intervening night of Friday-Saturday. This would have been followed by rover (Pragyan) roll-out between 5:30 am to 6:30 am.

Updated: Sep 07, 2019 11:17 IST
HT Correspondent
Hindustan Times, New Delhi
chandrayaan-2_e5508cec-d111-11e9-a264-bc92e50e5c68.jpg
Live telecast of soft landing of Vikram module of Chandrayaan 2 on lunar surface, in Bengaluru on Saturday. As declared by ISRO Chairman Kailasavadivoo Sivan, the connection with Vikram lander was lost and resumption of communications is awaited. (PTI Photo/Video grab)


Former Indian Spacer Research Organisation (ISRO) Director D Sasikumar on Saturday said that there was no need to feel disheartened as the communication loss with “Vikram” lander may not have been due to crash-landing.

“We have to find out from the communication data whether it is a soft landing or it is a crash landing. In my opinion, it is not a crash landing because the communication channel is on between the lander and the orbiter. It should be intact. So, let us hope after the analysis done, we may be able to get the final figure,” he said, reports ANI

The Vikram lander was supposed to land on the south pole of the moon between 1:30 am to 2:30 am on the intervening night of Friday-Saturday. This would have been followed by rover (Pragyan) roll-out between 5:30 am to 6:30 am. Minutes before touchdown, Isro lost contact with lander Vikram.

Earlier, Indian Space Research Organisation (ISRO) said in a tweet, “normal performance was observed up to an altitude of 2.1 km. Subsequently, communication from Lander to the ground stations was lost. Data is being analyzed.”

Chandrayaan 2: 'Don't lose heart', says PM Modi after Vikram lander loses contact during descent

Prime Minister Narendra Modi tells ISRO scientists to not lose heart after communication was lost with Chandrayaan 2's Vikram lander.

The Vikram Lander successfully separated from Chandrayaan-2 Orbiter on September 2. The Chandrayaan-2 Orbiter continues to orbit the Moon.

After revolving around the Earth’s orbit for nearly 23 days, the craft began its journey to the moon on August 14.

Prime Minister Narendra Modi, speaking to the scientists, said they should not be disheartened and should look towards a new dawn. “There will be a new dawn and brighter tomorrow very soon,” he said in an address from the Isro control centre.

Modi hailed India’s scientist and assured them that they had the support of the entire country.

“To our scientist I want to say India is with you. You are exceptional professionals who have made an incredible contribution to national progress,” he said.

Chandrayaan 2 landing- ‘Vikram may have landed on moon, let’s wait for analysis’, says former Isro chief
 
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Guynextdoor said:
Would be great if we can get pictures of the landing site
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Pictures will be available someday that's sure . Traffic to / sensor coverage on moon is only increasing day by day.

Chances are later on the orbiter ( at the end of its mission life ) might be positioned over the suspected landing site for analysis or maybe even earlier
 
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Passion of those scientists were visible in the entire events ( till the hug by PM).... These guys have put heart and soul to this..... and I must say that are one set of souls who always made proud as an Indian....

PM Modi also won hearts by his actions..... His speech was really an inspiring one.....the best line was..... I take Inspiration from each one of you.....
 
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nair said:
Passion of those scientists were visible in the entire events ( till the hug by PM).... These guys have put heart and soul to this..... and I must say that are one set of souls who always made proud as an Indian....

PM Modi also won hearts by his actions..... His speech was really an inspiring one.....the best line was..... I take Inspiration from each one of you.....
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I think he was able to direct the emotions of the people very well. He said what everyone wanted to tell them- they have our support. MMS is a great guy but he can never direct the emotions of people because he is an academic first and leader next.
 
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