Chandrayan-2 Mission

Dilbu · Post by **Dilbu** » 07 Sep 2019 02:30

Vikram lander will fail onlee.

SwamyG · Post by **SwamyG** » 07 Sep 2019 02:30

Modi would not have walked out...if there was a glimmer of good news. No?

NRao · Post by **NRao** » 07 Sep 2019 02:30

Republic World:
https://www.youtube.com/watch?v=d6VmPU6Us00

UlanBatori · Post by **UlanBatori** » 07 Sep 2019 02:30

Is that Orbiter calling Lander onlee?

SwamyG · Post by **SwamyG** » 07 Sep 2019 02:31

Media just giving unnecessary hopes?

Gagan · Post by **Gagan** » 07 Sep 2019 02:32

The time lag for comms is about 2.5 seconds only.
if the lander sped up in the end, instead of further slowing down, they know already.
Attitude control data must have been available till they lost comms, so they will know if it is tipping over.
The animation on the screen generates images based on the lander's attitude control data. It showed a tumble right before comms was lost.

RKumar · Post by **RKumar** » 07 Sep 2019 02:32

ISRO will release statement soon after reviewing the data....

NRao · Post by **NRao** » 07 Sep 2019 02:32

Now Republic World claims: "Awaiting data" and "Waiting for signal from Vikram"

Nsmith · Post by **Nsmith** » 07 Sep 2019 02:33

Wasn't the orbiter supposed to fly by and take pictures of the lander?

Re: the hand gestures, my guess is they were debating if it went into a tumble or descended in the correct orientation. Also heard one lady scientist also say that we've lost RF, but doesn't mean that the rest of systems didn't perform.

SaiK · Post by **SaiK** » 07 Sep 2019 02:34

up to 2.1km altitude normal parfarmance

SwamyG · Post by **SwamyG** » 07 Sep 2019 02:34

Everything good until 2.1 km. Then communication lost.

NRao · Post by **NRao** » 07 Sep 2019 02:34

comm lander to ground was lost

Krita · Post by **Krita** » 07 Sep 2019 02:34

Mission normal upto 2.1 kms thereafter comm lost.

UlanBatori · Post by **UlanBatori** » 07 Sep 2019 02:34

ISRO Chief: Comms lost at 2.1km. Naarmal until then. Data being analyzed.

Gagan · Post by **Gagan** » 07 Sep 2019 02:34

2.1 km altitude was the last known normal performance, then comms was lost.
Data being analyzed.

bhavani · Post by **bhavani** » 07 Sep 2019 02:35

The communication seems to be working. They are waiting for comms to work. Even if the lander was partially damaged, it would be a success if we get a ping back

Dilbu · Post by **Dilbu** » 07 Sep 2019 02:35

Only communication is lost or has it crashed?

vnms · Post by **vnms** » 07 Sep 2019 02:35

Rahu/Ketu, yeh tum logan kya kara re!

A_Gupta · Post by **A_Gupta** » 07 Sep 2019 02:35

What causes loss of communications at 2.1 kilometers altitude?

Perhaps that's when lander started tumbling?

Gagan · Post by **Gagan** » 07 Sep 2019 02:36

The screen is fixed with picture of the orbiter, which is now coming into play.

Gagan · Post by **Gagan** » 07 Sep 2019 02:36

A_Gupta wrote:What causes loss of communications at 2.1 kilometers altitude?

If it tumbles, its antenna won't face the orbiter or the earth.

SwamyG · Post by **SwamyG** » 07 Sep 2019 02:36

Modi patting Dr. Sivan.

Patni · Post by **Patni** » 07 Sep 2019 02:37

Signal lost at 2.1km altitude. it's mostly a hard landing. Tough luck ISRO. Let's get it right next time. Modi just said courageous.

Nsmith · Post by **Nsmith** » 07 Sep 2019 02:37

PM has left the building.

Edit: my bad. PM talking live now.

NRao · Post by **NRao** » 07 Sep 2019 02:37

Modi giving some encouraging words.

Krita · Post by **Krita** » 07 Sep 2019 02:37

Modi to scientists be courageous , so bad news.

SaiK · Post by **SaiK** » 07 Sep 2019 02:38

orbiter comms is on

UlanBatori · Post by **UlanBatori** » 07 Sep 2019 02:38

Modi giving gracious pat on the back to the guys. THAT's a leader!

SwamyG · Post by **SwamyG** » 07 Sep 2019 02:38

Modi...giving pep talk.

UlanBatori · Post by **UlanBatori** » 07 Sep 2019 02:39

Isn't the dust cloud from impact full of scientific data, esp from South pole/far side?

GopiD · Post by **GopiD** » 07 Sep 2019 02:39

There should have been some onboard explosion when trying to switch to two engines. Otherwise, there's no reason for loss of Comms at that altitude. JMT.

Dilbu · Post by **Dilbu** » 07 Sep 2019 02:40

Good words for ISRO from Modiji. Well deserved. Whatever happens we are all proud of you ISRO.

UlanBatori · Post by **UlanBatori** » 07 Sep 2019 02:41

Maybe it's like my BSNL OTP from IndusIndBank. Takes 20 minutes. Be patient.

Dilbu · Post by **Dilbu** » 07 Sep 2019 02:41

Modiji addressing children. Happy to see that the kids are getting a boost at the end of the day.

Gagan · Post by **Gagan** » 07 Sep 2019 02:42

If they were switching down from 4 engines to 2 engines, then one of them didn't switch off in time, and created an imbalance, causing loss of attitude stability most likely
I am speculating only.

SaiK · Post by **SaiK** » 07 Sep 2019 02:43

let's wait for the data analysts from ISRO to provide answers

SwamyG · Post by **SwamyG** » 07 Sep 2019 02:43

Modi taking questions from students

juvva · Post by **juvva** » 07 Sep 2019 02:44

Looked like the lander was descending vertically for quiet some time before it deviated sharply from the nominal trajectory.... looking bad.. looking like a tumble.

Patni · Post by **Patni** » 07 Sep 2019 02:46

ISRO will do proper cause n effect analysis from available data that's for sure. They will scan and get pictures of landing site from orbiter in few hours.

Gagan · Post by **Gagan** » 07 Sep 2019 02:48

Final image: