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#21
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Sooner or later some space debris will kill a person
"bob haller" wrote in message
... you know or guess you dont there are companies planning on deploying vehicles to retrieve and relocate satellites, using a universal grapple or docking port. Considering this has been done off and on since Solar MAX, I think we know that. And it's how most of ISS was assembled. So this is hardly rocket science. there are even plans for one that can dock and refuel a sat in orbit that was never designed to be refueled interest in ideas like this are higher since satellites have become more expensive The interest is in saving on launching a new sat to replace an old one that is simply low on fuel. This has nothing to do with saving someone from being killed by orbital debris. Vastly different economics. And I can guarantee that any company doing refueling is going to focus on a small set of satellites simply because orbital mechanics make anything else impractical. This isn't rocket science Bob. It's economics. -- Greg D. Moore http://greenmountainsoftware.wordpress.com/ CEO QuiCR: Quick, Crowdsourced Responses. http://www.quicr.net |
#22
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Sooner or later some space debris will kill a person
On 11/5/2013 8:44 AM, Jeff Findley wrote:
You likely don't remember it because it was really, really, really bad. Even if you saw the show, it's best forgotten. But the Internet has a really good "memory", so there is still info "out there" about the show. But to give you an idea how "popular" the show was, the IMDB page for this show is pretty much a placeholder. It's got a list of the actors, but that's it. No write-up, no pictures, no real details, other than "it existed". Jeff Ah but I live for "it existed"! Obviously the failure of this show was the omission of Don Knotts & Jim Neighbors in leading roles... Wonder if I can stream it via Netflix? (ah no but there is YouTube!) http://www.youtube.com/watch?v=MykpNI8ABU4 My weekend is hereby scheduled... Still awaiting the production of Season 2 of Earth II.... http://en.wikipedia.org/wiki/Earth_2_%28TV_series%29 ;-) Had Salvage 1 made it to Season 3 wonder if they would have replaced mono-hydrazine with mono-magnetism? Oh Oh I know! A GOX/GH2 mixture pressurized to 6000 psi!!!! (as followed on arocket)... Now there's a mono-propellant! Dave |
#23
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Sooner or later some space debris will kill a person
communication satellites have been getting larger, and more expensive over time.
this encourages the dock and refuel ideas and is really valuable when a sat gets stuck in a low unusable orbit..... the fact that something has not occured just means that its at least somewhat more likely in the future.. |
#24
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Sooner or later some space debris will kill a person
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#25
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Sooner or later some space debris will kill a person
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#26
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Sooner or later some space debris will kill a person
On 6/11/2013 1:04 AM, Jeff Findley wrote:
In article , ess says... On 4/11/2013 6:42 AM, bob haller wrote: Perhaps many people if a chunk of space debris happens to impact a airliner. What will be the effects of such a event if its verified space debris has caused the problem? Is it a plausible event? The small stuff can't descend that low before it burns up, and the larger stuff is tracked so that we have good idea of when and where there is an impact risk. That is to say, during the final day or so during which a piece can come down, we know, for each place it could hit, fairly accurately when that would be. Aircraft can just avoid the risk area at those times. It's hard to predict where something "uncontrolled" will come down, especially if it's doing a "Skylab style" reentry where you can't quite predict exactly what part of what (very low) orbit will finally bring it down due to aerodynamic drag. It's clear that over the day or so in which it is predicted to come down, that impact point covers a large area the globe. What I had in mind is that this is not because it can fall anywhere in that area at any time, but because there's a much smaller area in which it can fall, but the area is moving relative to the Earth's surface. By way of example, in a particular case, it might hit my home town of Sydney, Australia, or any other place under its orbital plane over a day or so. But if it is to hit Sydney, it would have to be between 1pm and 1:30pm on a particular day. So aircraft just avoid Sydney on that day between 1pm and 1:30pm. However, I don't know whether the risk is even considered large enough for that step to be taken. Sylvia. |
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Sooner or later some space debris will kill a person
It's the first re-entry of this kind of an ESA satellite in more than 25 years," Floberghagen said. "The [political] climate now is very different. There's a lot of focus on space debris, not only with cleaning space but also on re-entry and the risks associated with re-entry. We need to be aware of this because, sooner or later, someone is going to be unlucky and the be first one to hit something."
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#28
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Sooner or later some space debris will kill a person
In article ,
says... It's the first re-entry of this kind of an ESA satellite in more than 25 years," Floberghagen said. "The [political] climate now is very different. There's a lot of focus on space debris, not only with cleaning space but also on re-entry and the risks associated with re-entry. We need to be aware of this because, sooner or later, someone is going to be unlucky and the be first one to hit something." None of what you "typed" is your own words. So "nice" of you to cut and paste from an article without giving a link back to the original. I'm sure Spaceflight Now would be pleased... http://www.spaceflightnow.com/news/n1311/08goce/ Why didn't you quote this part of the article: "The risk to the population on ground will be minute," said Heiner Klinkrad, head of the European Space Agency's space debris office in Darmstadt, Germany. "Statistically speaking, it is 250,000 times more probable to win the jackpot in the German Lotto than to get hit by a GOCE fragment. In 56 years of space flight, no man-made space objects that have re-entered into Earth's atmosphere have ever caused injury to humans." In other words, if someone does get hurt or killed, it will obviously be a financial liability to ESA. But, life will go on and space missions will go on as well. Jeff -- "the perennial claim that hypersonic airbreathing propulsion would magically make space launch cheaper is nonsense -- LOX is much cheaper than advanced airbreathing engines, and so are the tanks to put it in and the extra thrust to carry it." - Henry Spencer |
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