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Bernd Machenschalk
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Topic 198218

Preliminary dates:

Advanced LIGO first science run "O1" start Sep 14.

LISA Pathfinder launch Nov 27 5:45 CET

BM

BM

Mike Hewson
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Save the dates ...

Quote:

Preliminary dates:

Advanced LIGO first science run "O1" start Sep 14.

LISA Pathfinder launch Nov 27 5:45 CET

BM


Yo, that is great news Bernd .... and next week .... woo, woo, wooo .... :-)

Cheers, Mike.

I have made this letter longer than usual because I lack the time to make it shorter. Blaise Pascal

Stranger7777
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Let's crunch the whole FU3 in

Let's crunch the whole FU3 in week before the O1 starts.

Bernd Machenschalk
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LISA Pathfinder has started

LISA Pathfinder has started its (statistically) most dangerous part of its journey: traveling to UK on a truck.

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Logforme
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RE: LISA Pathfinder has

Quote:
LISA Pathfinder has started its (statistically) most dangerous part of its journey: traveling to UK on a truck.


Traveling on UK roads is more risky than sitting on top of a tube filled with fuel undergoing a controlled explosion? Is that because they drive on the wrong side of the road? :)

Stranger7777
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RE: Is that because they

Quote:
Is that because they drive on the wrong side of the road? :)


Exactly, they are also drive from the wrong side of the car :)

P.S. We here (in Russia) have a right side driving roads, by my car is right handed and it doesn't confuse anybody ;)

archae86
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RE: P.S. We here (in

Quote:
P.S. We here (in Russia) have a right side driving roads, by my car is right handed and it doesn't confuse anybody ;)


In riding the railroad from Moscow to a bit east of Irkutsk, I got the impression that with each significant journey east the fraction of used Japanese right-hand drive cars increased. While I hardly noticed them in Moscow, by the time we turned south to head down to Ulanbaatar, they seemed well over 25% of passenger cars on the road. I'd imagine it gets higher yet as one approaches Vladivostok.

This was in 2010. Have the used Japanese imports become even more common since then?

They were also a major presence in Mongolia, though the proportion of them that were SUVs seemed much higher.

Billy Russell
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Dear Bernd et al. Below is

Dear Bernd et al. Below is part of a public announcement from Glasgow University. Bernd, Scotland had just equalized against Germany at Hampden Park. Oh no, now its 2-1 to Germany!

"The highly sensitive measurement system of LISA Pathfinder"

"Two identical cube-shaped test masses weighing about two kilograms each will be free-floating in their own vacuum canisters for the duration of the mission. They will be almost free of all internal and external disturbances and will thus allow the demonstration of the precise measurement of free-falling masses in space. A special gold-platinum alloy has been used for the masses to eliminate any influence from magnetic forces. Using ultraviolet radiation, a contact-free discharge system prevents electrostatic charge build-up on the test masses. The caging and grabbing mechanism – responsible for protecting the test masses from intense vibrations during launch, releasing them in a highly controlled setting, and capturing them as necessary – is a particular challenge in this context. A laser interferometer will measure the position and orientation of the two test masses relative to the spacecraft and to each other with a precision of approximately 10 picometers (one hundred millionth of a millimetre).

In addition, there are less precise capacitive inertial sensors that also help determine their positions. The positional data is used by a Drag-Free Attitude Control System (DFACS) to control the spacecraft and ensure it always remains centered on one test mass. The actual position of the satellite is controlled through cold gas micronewton thrusters, which have the capability of delivering propulsion in extremely fine and uniform amounts. The thrust generated is in the micronewton range – this equates to the weight of a grain of sand on Earth.

Paving the way for new astronomy

LISA Pathfinder paves the way for eLISA, a large space observatory for the direct observation of one of the most elusive astronomical phenomena – gravitational waves. These tiny distortions of space-time were predicted by Albert Einstein and their observation requires an extremely sensitive and highly precise measurement technology. Space observatories like eLISA will measure gravitational waves in the millihertz range. They will complement ground-based detectors such as GEO600, aLIGO, and Virgo, which observe at higher frequencies in the audio range. Gravitational wave observatories will probe unknown domains – the “dark side of the universe†– in concert with other astronomical methods. One example is the formation, growth and merger of massive black holes. It will also be possible to further test Einstein’s Theory of General Relativity and search for unknown physics.

Bernd Machenschalk
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RE: Dear Bernd et al. Below

Quote:
Dear Bernd et al. Below is part of a public announcement from Glasgow University. Bernd, Scotland had just equalized against Germany at Hampden Park.

Well, it was more Germany (Hummels) that had equalized against Germany.

But anyway - current score is Gemany 3 : Scotland 2 :-P

BM

BM

Bernd Machenschalk
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RE: RE: LISA Pathfinder

Quote:
Quote:
LISA Pathfinder has started its (statistically) most dangerous part of its journey: traveling to UK on a truck.

Traveling on UK roads is more risky than sitting on top of a tube filled with fuel undergoing a controlled explosion? Is that because they drive on the wrong side of the road? :)

Nope, plain statistics. It's much more likely to die in a car accident on the way to or from the airport than in a plane crash. And I think 3/4 of the way are on continental roads.

BM

BM

Stranger7777
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RE: I'd imagine it gets

Quote:
I'd imagine it gets higher yet as one approaches Vladivostok.


That's right. Almost all Vladivostok people moves on Japanese cars. And a rather small fraction uses Korean cars. Even municipal transport uses them.

Quote:
Have the used Japanese imports become even more common since then?


Unfortunelly no. Since 2010 our goverment raised import taxes significantly.
So, only small cars can be imported yet. One of them, imported from Japan
slighly before Fukushima accident (so it's not radioactive) I use as a secondary car.
It's mirrored copy (but with left hand drive) called Subaru Justy (though it is Toyota Passo or even more Daihatsu Boon) I've seen on the parking of AEI in Hanover.

Quote:
They were also a major presence in Mongolia, though the proportion of them that were SUVs seemed much higher.


Yes, SUVs are more durable and thus are more popular even here in South Urals.

Sorry for off-topic.

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