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by Gagan
07 Sep 2019 17:42
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Mort Walker wrote:
Gagan wrote:The orbiter has a Camera with a 30cm resolution !!!
This is perhaps the most high resolution camera to ever orbit the moon !


Source please.

Mort ji
The Principal Scientific Advisor to GoI has tweeted the above.
by Gagan
07 Sep 2019 17:41
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Posting a series of twitter posts by the Principal Scientific Advisor GOI: Since the launch of Chandrayaan-2 on July 22, 2019, India and the world watched its progress from one phase to the next with great expectation and excitement. The Chandrayaan-2 mission is very complex, and a significant techn...
by Gagan
07 Sep 2019 17:23
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

PM Bhutan wrote:We are proud of India and its scientists today. Chandrayaan-2 saw some challenges last minute but the courage and hard work you have shown are historical. Knowing Prime Minister @narendramodi, I have no doubt he and his ISRO team will make it happen one day.
by Gagan
07 Sep 2019 17:10
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

The orbiter has a Camera with a 30cm resolution !!!
This is perhaps the most high resolution camera to ever orbit the moon !
by Gagan
07 Sep 2019 12:06
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

It passes over the same spot every 2 hrs or so
They probably had an image while PM was still at ISRO HQ
by Gagan
07 Sep 2019 11:56
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

From News18: Is that a ‘UGE camera or what?
Image
by Gagan
07 Sep 2019 11:53
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

From India Today:
Image
by Gagan
07 Sep 2019 11:49
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

As told by so many, this mission accomplished: Heaviest successful payload launch to GTO - means lift capacity for Gaganyaan available. Rishi_Tri ji For gaganyaan they will need perhaps 3-4 x the throw weight that the Mk3 has. Semi cryo is the answer. Maybe they can get a few RD-180 or 170 from roo...
by Gagan
07 Sep 2019 11:35
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Well Vikram HAS landed. It is a hard landing They must have anticipated problems with throttling down 4 engines, so had to go down the route of having just two engines Also remember, the 4 engines are not working at a 100% each! At least two are controlling their thrust a bit as the lander is being ...
by Gagan
07 Sep 2019 06:07
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Lunar soil is negatively charged, and too much dust will hamper comms
If it is buried in a dune, its solar panel won't charge it and it will not communicate
by Gagan
07 Sep 2019 05:03
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

All that is knows is that there is a comms cut off. It still had several seconds before it should have landed. <Conspiracy Theory> PM, Dr Sivan, Other senior ISRO officials go to Dr Sivan's office, where they look at encrypted photos of the landing site taken by the orbiter in near real time. They k...
by Gagan
07 Sep 2019 04:50
Forum: Military Issues & History Forum
Topic: INS Arihant: News & Discussion
Replies: 359
Views: 100761

Re: INS Arihant: News & Discussion

Only info that is already open source comes in here.
But some posters here, need to adhere to it as well
by Gagan
07 Sep 2019 04:46
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Its angle is already close to horizontal as it is firing its retro rockets to slow down, there is a risk that it can tip over completely at that point. Its angle is carefully controlled and it is progressively brought to a more vertical attitude from an angle that is closer to horizontal. It is poss...
by Gagan
07 Sep 2019 04:09
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

They can use cushioning balloons like the ones used while landing on Mars Or they should have a Single gimbaled engine, or throttle down 4 engines. I am no rocketery expert, other than the Diwali Rockets, but 2 engines seems like a lot of balancing to do. And the transition from 4 to 2 to 1 was goin...
by Gagan
07 Sep 2019 04:05
Forum: Military Issues & History Forum
Topic: INS Arihant: News & Discussion
Replies: 359
Views: 100761

Re: INS Arihant: News & Discussion

We have confirmation that the Indian Navy now has at least 3 N subs in the water.
by Gagan
07 Sep 2019 04:03
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

If it was inverted or horizontal, and its engines burning, that will cause deviation from the flight path laterally, which possibly seems to have happened.
Also descent velocity which was coming down, will start to now increase
by Gagan
07 Sep 2019 04:00
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

See from 2:42 till 2:59 ...
by Gagan
07 Sep 2019 03:59
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

The final moments of Vikram Lander: The graph deviates at 2:17 seconds. At 2:42, Vikram is nearly inverted !!! It recovers, then over corrects !!! It tumbled at the critical juncture when soft landing phase was started. This indicates perhaps that one engine shut off later than the other, causing an...
by Gagan
07 Sep 2019 03:40
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

If it is confirmed failure then I think ISRO should go for a Lander + Rover only mission with a Vikram-R modified accordingly with in the next year If there is no orbiter, then they can land a much bigger lander, with way more equipment on it. Maybe they can have the Rover go back and forth between...
by Gagan
07 Sep 2019 03:38
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

The camera on the Orbiter looks HUGE !!!!
It is like a mini hubble telescope no?
If it is Hi-Res enough, it can see ALL the moon missions.

The only hitch is that the Vikram Landing site have sunlight for pictures to be available !
by Gagan
07 Sep 2019 03:36
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Vikram cannot communicate to ground station. It can only talk to Orbiter. If the Orbiter is on the other end, can Vikram communicate to it? Don't we need to wait for it circle back. It can communicate directly Pragyan rover, can only communicate with Vikram Lander, which communicates with the Deep ...
by Gagan
07 Sep 2019 03:34
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

So what is next? Would this mission be abandoned and would they have to start a new one or is this salvageable? The orbiter mission is on for atleast one year. They will complete that detailed 3D map of the Moon, that was interrupted when Chandrayaan 1 stopped functioning. India should have the MOS...
by Gagan
07 Sep 2019 03:32
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

SaiK wrote:Typo. Sorry

Too big a mistake...
Can't be forgiven onlee... :eek:
by Gagan
07 Sep 2019 03:30
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

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
by Gagan
07 Sep 2019 03:30
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Momentarily it might, if the debris is too much, but not for this long
by Gagan
07 Sep 2019 03:26
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

The dust and debris will disrupt Comms? If it got too close to the moonsurface?
by Gagan
07 Sep 2019 03:22
Forum: Military Issues & History Forum
Topic: INS Arihant: News & Discussion
Replies: 359
Views: 100761

Re: INS Arihant: News & Discussion

Google earth images show TWO Arihant Class subs in the water.
by Gagan
07 Sep 2019 03:18
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

If they get pictures, will they have the heart to release the pics?
It is like their baby, they nurtured it to this stage :(
by Gagan
07 Sep 2019 03:13
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

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?
by Gagan
07 Sep 2019 03:12
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Nothing on the X band per the poster above
by Gagan
07 Sep 2019 03:10
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

X band from the Lander:
Image
by Gagan
07 Sep 2019 03:06
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

If they get the first stage semi cryo engines from Russia, they can do it, but validating the rocket will take several development flights.
by Gagan
07 Sep 2019 03:02
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Now in serial order: The kink in the Doppler curve of #Chandrayaan2Live Vikram lander shows that the landing burn started. https://pbs.twimg.com/media/EDzp6WqXkAEXkCi.png The landing burn is progressing well! https://pbs.twimg.com/media/EDzqmRIXkAUTUz1.png Another kink in the Doppler curve. The end ...
by Gagan
07 Sep 2019 02:56
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

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

Not sure what it is

Image
by Gagan
07 Sep 2019 02:54
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

What is the resolution of the Orbiter's cameras?
by Gagan
07 Sep 2019 02:54
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

BUCK UP ISRO !
You are our heros!
by Gagan
07 Sep 2019 02:53
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

The orbiter has probably taken pics already, if it has passed overhead?
by Gagan
07 Sep 2019 02:48
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

Final image:
Image
by Gagan
07 Sep 2019 02:42
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

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.
by Gagan
07 Sep 2019 02:36
Forum: Military Issues & History Forum
Topic: Chandrayan-2 Mission
Replies: 2219
Views: 270433

Re: Chandrayan-2 Mission

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.

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