Chandrayan-2 Mission

vijayk · Post by **vijayk** » 07 Sep 2019 02:49

sad but failure is a stepping stone to success.

Zynda · Post by **Zynda** » 07 Sep 2019 02:50

To me, it looked like during Rough Braking, the target min velocity was not reached. If I heard correctly, they were expecting around 140 m/s velocity at the end of rough braking but the actual speed was greater than 200 m/s...but then I saw many scientists clapping...so though performance was naarmal onlee. And the deviation from target path happened during fine braking...So I guess Vikram was descending faster than expected. Anyways, I am sure ISRO would have received lots of data from which lessons will be learnt for future missions.

RKumar · Post by **RKumar** » 07 Sep 2019 02:50

Good job ISRO, failures are the path to success. We will do the home work and do it right next time.

Indranil · Post by **Indranil** » 07 Sep 2019 02:51

Buck up ISRO! HUGE HUGE HUGE hugs from my side to each one of you. We all know what you are made of. This small failure is nothing!

NRao · Post by **NRao** » 07 Sep 2019 02:51

Gagan wrote:Final image:

IF the lander had the intelligence to select a spot to land (which was my understanding), then that picture should not be a -ve IMHO.

BTW, the orbiter is doing just fine - for the record.

Gagan · Post by **Gagan** » 07 Sep 2019 02:53

The orbiter has probably taken pics already, if it has passed overhead?

NRao · Post by **NRao** » 07 Sep 2019 02:53

Modi Tweet:

India is proud of our scientists! They’ve given their best and have always made India proud. These are moments to be courageous, and courageous we will be!

Chairman
@isro
gave updates on Chandrayaan-2. We remain hopeful and will continue working hard on our space programme.

Primus · Post by **Primus** » 07 Sep 2019 02:53

Proud of ISRO, regardless of outcome. Great to have come within a few inches (in this context) of the ultimate goal. The orbiter remaining in orbit and still able to send data is in itself a huge accomplishment.

Gagan · Post by **Gagan** » 07 Sep 2019 02:54

BUCK UP ISRO !
You are our heros!

AdityaM · Post by **AdityaM** » 07 Sep 2019 02:54

Some Doppler plots of vikram trajectory
https://twitter.com/cgbassa/status/1170 ... 14624?s=21

Not sure what it is

Gagan · Post by **Gagan** » 07 Sep 2019 02:54

What is the resolution of the Orbiter's cameras?

Gagan · Post by **Gagan** » 07 Sep 2019 02:56

AdityaM wrote:Some Doppler plots of vikram trajectory
https://twitter.com/cgbassa/status/1170 ... 14624?s=21

Not sure what it is

juvva · Post by **juvva** » 07 Sep 2019 02:57

Another reminder.... space is hard.

Amber G. · Post by **Amber G.** » 07 Sep 2019 02:57

First - we will know soon enough what went wrong.
This BTW does not change a bit about how good ISRO is.
For perspective, IIRC NASA had something like 10 failures before Apollo 11's soft landing.
Modi, as always, showed a great leadership and yes, we can all be proud of ISRO.

arshyam · Post by **arshyam** » 07 Sep 2019 03:00

Press asked to wait 15 min for further updates

Gagan · Post by **Gagan** » 07 Sep 2019 03:02

Now in serial order:

The kink in the Doppler curve of #Chandrayaan2Live Vikram lander shows that the landing burn started.

The landing burn is progressing well!

Another kink in the Doppler curve. The end of the rough braking phase.

Uh oh.... the signals have disappeared...

Cain Marko · Post by **Cain Marko** » 07 Sep 2019 03:03

Iirc they had the speed down to 48kmps..

VikramA · Post by **VikramA** » 07 Sep 2019 03:04

Let's hope chandrayaan 3 is announced as soon as possible with hopefully a rover having isotope heated unit as power backup

Gagan · Post by **Gagan** » 07 Sep 2019 03:06

If they get the first stage semi cryo engines from Russia, they can do it, but validating the rocket will take several development flights.

Gagan · Post by **Gagan** » 07 Sep 2019 03:10

X band from the Lander:

Gagan · Post by **Gagan** » 07 Sep 2019 03:12

Nothing on the X band per the poster above

Gagan · Post by **Gagan** » 07 Sep 2019 03:13

The final telemetery is snake like, possible tumble.

VIKRAM HAS LANDED ON THE MOON. The question is if it has soft landed? Or Hard Landed?

Suraj · Post by **Suraj** » 07 Sep 2019 03:16

A hard landing would probably show up as a dust cloud and debris field from the orbiter. No information as yet about what the orbiter has seen so far.

Mort Walker · Post by **Mort Walker** » 07 Sep 2019 03:17

Gagan wrote:X band from the Lander:

The red dot is 3dB higher. Need to look at it with a narrower resolution bandwidth if possible.

Gagan · Post by **Gagan** » 07 Sep 2019 03:18

If they get pictures, will they have the heart to release the pics?
It is like their baby, they nurtured it to this stage

arshyam · Post by **arshyam** » 07 Sep 2019 03:18

Gagan wrote:Nothing on the X band per the poster above

What does that mean? Just no comms?

Dasari · Post by **Dasari** » 07 Sep 2019 03:19

How often Orbiter passes this site? It may not find anything until the dust settles.

disha · Post by **disha** » 07 Sep 2019 03:20

Gagan wrote:Final image:

This deviation is where I gasped.

Mort Walker · Post by **Mort Walker** » 07 Sep 2019 03:23

If Vikram sent a picture when it switched into fine braking, we would know a lot better now.

Amber G. · Post by **Amber G.** » 07 Sep 2019 03:24

Dasari wrote:How often Orbiter passes this site? It may not find anything until the dust settles.

It passes this site about every two hours (1 hr 55 minutes or so).

SaiK · Post by **SaiK** » 07 Sep 2019 03:25

Gagan wrote:If they get pictures, will they have the heart to release the pics?
It is like their baby, they nurtured it to this stage

The advice is go by science and technology. Not emotions.

Gagan · Post by **Gagan** » 07 Sep 2019 03:26

The dust and debris will disrupt Comms? If it got too close to the moonsurface?

SaiK · Post by **SaiK** » 07 Sep 2019 03:27

No saar. It should not disrupt communicating with the orbiter.

vnms · Post by **vnms** » 07 Sep 2019 03:29

Who is that moron from the press that is yelling at the gentleman making an announcement? He was asking why the chairman was not giving the press announcement.

SaiK · Post by **SaiK** » 07 Sep 2019 03:29

The key data we have now is it lost comms ar 2.7km altitude.

Something went wrong in decision phase to land.

Gagan · Post by **Gagan** » 07 Sep 2019 03:30

Momentarily it might, if the debris is too much, but not for this long

Gagan · Post by **Gagan** » 07 Sep 2019 03:30

Pallav Bagla shouting loudly ...
I tell you these NDTV walas !
They will always slip in a question about poor country, what is the justification for space program, and now shouting loudly about ISRO tradition.

ISRO asks presstitutes to leave the ISRO campus ASAP

Dasari · Post by **Dasari** » 07 Sep 2019 03:31

SaiK wrote:The key data we have now is it lost comms ar 2.7km altitude

I think 2.1km.That is what the chairman said.

SaiK · Post by **SaiK** » 07 Sep 2019 03:31

Typo. Sorry

shaun · Post by **shaun** » 07 Sep 2019 03:32

Why communication went off at 2.1 km altitude ?? An explosion ??