News Chandrayaan-2 mission news.

[Notebook]

India's Chandrayaan-2 Spacecraft Snaps Its First Picture of the Moon
By Meghan Bartels 21 hours ago Spaceflight

https://www.space.com/india-chandrayaan-2-first-moon-photo.html?utm_source=notification

 

[Notebook]

India's Chandrayaan-2 Moon Orbiter Releases Vikram Lunar Lander
By Meghan Bartels 41 minutes ago Spaceflight

https://www.space.com/india-chandra...ander-separation.html?utm_source=notification

 

[Sbb1413]

Re: Chandrayaan-2 mission news

According to Wikipedia, Vikram Sarabhai lander is scheduled to land on 7 September 2019, 01:55 IST (6 September 2019, 20:25 UTC).

Well, I need to stay wake up to see that the lander is landing on the Moon.

 

[Notebook]

do you know if there will be any live camera feed from the lander?

 

[4throck]

Here's the official live stream:
[ame="https://www.youtube.com/watch?v=7iqNTeZAq-c"]Watch Live : Landing of Chandrayaan-2 on Lunar Surface[/ame]

I'm only expecting live telemetry and the occasional low res image, but lets see.

 

[Sbb1413]

Re: Chandrayaan-2 mission news

I need to set an alarm to 12:45 IST to wake up and watch the lander lands on the moon. Once landed, I will sleep again with joy.

Unfortunately, it would ruin my sleep!

 

[Thunder Chicken]

Another feed is live now:


[ame="https://www.youtube.com/watch?v=SFf-vaX-3Yk"]Chandrayaan 2 Live Streaming - ISRO Chandrayaan 2 Moon Landing Live Updates Today Online HD - YouTube[/ame]


About an hour to touchdown (4:25 ET / 3:25 CT / 2:25 MT / 1:25 PT for CONUS folks) if all goes well.

 

[Urwumpe]

Damn, such a tough decision... Germany vs Netherlands or Chandrayaan 2 to the Lunar South Pole...

 

[Notebook]

Its only a footie match, and it'll be back around soon...

 

[Urwumpe]

Its only a footie match, and it'll be back around soon...

"Only a footie match".... :rofl:

---------- Post added at 21:54 ---------- Previous post was at 21:46 ----------

Important politician on site...what could possibly go wrong?

---------- Post added at 22:05 ---------- Previous post was at 21:54 ----------

Didn't the clock read -20 minutes before I went into the kitchen to get some icecream?

 

[Thunder Chicken]

Didn't the clock read -20 minutes before I went into the kitchen to get some icecream?

Second half.

 

[Urwumpe]

The technical glitches in the lifestream are really weird, I remember India to be more perfectionist there.

 

[Thunder Chicken]

Watching the Vikram lander animation reminds me of the game Lunar Lander

Playable here:


http://moonlander.seb.ly/

 

[Urwumpe]

Is it now heading to lithobraking? :blink:

---------- Post added at 22:22 ---------- Previous post was at 22:21 ----------

Yes, that looks like a bad case of LOS

 

[Notebook]

Loss of telemetry never a good sign.
Was that area well surveyed?

 

[Urwumpe]

Loss of telemetry never a good sign.
Was that area well surveyed?

I am sure it was... I saw the lander in the visualization rotate heads down before the dive really accelerated and the signal was lost.



Maybe a software glitch when switching to fine landing mode.

 

[Thunder Chicken]

I am sure it was... I saw the lander in the visualization rotate heads down before the dive really accelerated and the signal was lost.

Maybe a software glitch when switching to fine landing mode.

I missed that. I hope it wasn't a sign error.


Tough luck.

 

[Urwumpe]

I missed that. I hope it wasn't a sign error.

Looked more like an attitude control failure, tumbling out of control. But it descended very fast, much faster than I would have expected from lunar gravity.

 

[4throck]

I'm no expert in interpreting Doppler

From https://forum.nasaspaceflight.com/index.php?topic=20324.msg1989823#msg1989823:

My guess it that anything is possible. Perhaps it was really firing upside down
Anyway, the signal seems to be lost a bit high (around 300m per ISRO last data-point).

 

[Urwumpe]

Didn't look like tumbling, it really seemed to be upside down and firing.
It completely nulled horizontal speed and seemed to increase vertical - consistent with such a firing.

So perhaps a navigation software fault ? Those seem quite common recently...

At 2.5 km, it was heads down, while at 1.5 km, it was heads up again, which is why I wonder if it was tumbling.

The Doppler shift also suggests it was rotating rapidly.