Author Topic: ESA - Rosetta updates  (Read 380257 times)

Offline woods170

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Re: ESA - Rosetta updates
« Reply #300 on: 11/13/2014 12:37 pm »
Lander is performing normally, from a systems point of view.

Still determining whether lander is not at too great an angle relative to the surface.

Offline Kaputnik

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Re: ESA - Rosetta updates
« Reply #301 on: 11/13/2014 12:38 pm »
Question about how the lander will cope with reduced solar exposure.
"Less solar power than we planned for- 1.5hrs rather than 6 or 7"
"Calculating now what this means for the near future. Not a situation we were hoping for."
"I don't care what anything was DESIGNED to do, I care about what it CAN do"- Gene Kranz

Offline woods170

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Re: ESA - Rosetta updates
« Reply #302 on: 11/13/2014 12:38 pm »
Less solar power being received than previous planned.

Planned was 6 to 8 hours of sunlight. Now down to only 1.5 hours of sunlight per 12 hour rotation.

Batteries working OK. Exact energy budget under review.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #303 on: 11/13/2014 12:39 pm »
ROLIS images of descent coming up.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #304 on: 11/13/2014 12:39 pm »
Stephan

Very busy thru the night to collect, analyse ROLIS data.
« Last Edit: 11/13/2014 12:40 pm by woods170 »

Offline woods170

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Re: ESA - Rosetta updates
« Reply #305 on: 11/13/2014 12:41 pm »
ROLIS images 40 seconds before landing (first touch down)

Image field of view is 5 meters across.
« Last Edit: 11/13/2014 12:42 pm by woods170 »

Offline woods170

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Re: ESA - Rosetta updates
« Reply #306 on: 11/13/2014 12:43 pm »
Happy chap at mission control.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #307 on: 11/13/2014 12:46 pm »
Initial touchdown was almost in exact center of landing elipse.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #308 on: 11/13/2014 12:47 pm »
Philae departure sequence showed it was rotating on it's way down. This was allowed for.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #309 on: 11/13/2014 12:49 pm »
White dot in red circle is Philae approx 65 minutes before landing.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #310 on: 11/13/2014 12:49 pm »
Improved departure image, courtesy of Rosetta team.
« Last Edit: 11/13/2014 01:21 pm by woods170 »

Offline woods170

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Re: ESA - Rosetta updates
« Reply #311 on: 11/13/2014 12:50 pm »
Initial landing point

Offline woods170

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Re: ESA - Rosetta updates
« Reply #312 on: 11/13/2014 12:52 pm »
View of entire area, including where lander finally ended up.
Exact location not yet known. Two candidates found, but need better imaging to avoid over-exposure. Search resumes on next comm run.
« Last Edit: 11/13/2014 01:22 pm by woods170 »

Offline woods170

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Re: ESA - Rosetta updates
« Reply #313 on: 11/13/2014 12:54 pm »
Wrapping up. Personal thanks being handed to spacecraft manager.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #314 on: 11/13/2014 12:55 pm »
Mission not over yet. Much more to come from the orbiter for weeks, months and possibly years to come.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #315 on: 11/13/2014 12:56 pm »
"It has been a magnificent two days".

Lander doing fine. Has pulled off huge achievement.

"Wonderfull mission"

"Rosetta will continue another 20 months at the comet".
« Last Edit: 11/13/2014 01:22 pm by woods170 »

Offline woods170

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Re: ESA - Rosetta updates
« Reply #316 on: 11/13/2014 12:57 pm »
Questions coming up.

Offline mcgyver

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Offline woods170

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Re: ESA - Rosetta updates
« Reply #318 on: 11/13/2014 01:00 pm »
Question: how come a soft surface caused Philae to bounce so much?

Answer: surface composition not as we expected. Soft, but not of high porosity due to accumulation of dust. It's soft yet quite firm.

Offline woods170

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Re: ESA - Rosetta updates
« Reply #319 on: 11/13/2014 01:02 pm »
Lander was designed with legs to perform small hops by extending the landing gear.

Not sure to be done now with only two feet on the ground. Still being determined whether or not a hop should be tried to get away from the pit and wall where Philae is stuck now.

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