Spy Satellite to Hit Earth by late February to March |
Spy Satellite to Hit Earth by late February to March |
Feb 21 2008, 04:01 AM
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#61
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Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
CNN just ran the story about 20 minutes ago, reporting a hit. No details, and no information whatsoever about how direct the hit was. The only "information" given was that the satellite was traveling at orbital velocity (first cosmic velocity to our Russian friends), roughly 17,500 mph, and the impactor was going about 5,000 mph in the opposite direction. (Yeah, I know, it's olde English imperial units -- but it's CNN, after all.)
-the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Feb 21 2008, 05:14 AM
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#62
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Senior Member Group: Admin Posts: 4763 Joined: 15-March 05 From: Glendale, AZ Member No.: 197 |
Space/AP
Navy Hits Satellite With Heat-Seeking Missile http://www.space.com/news/080220-satellite-hit.html -------------------- If Occam had heard my theory, things would be very different now.
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Feb 21 2008, 06:31 AM
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#63
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Member Group: Members Posts: 611 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
You haven't been keeping up with things, it is solid hydrazine. Many propellant tanks (Delta II, Columbia, etc) have survived hypervelocity entry I know *empty* propellant tanks can survive entry because of their low ballistic coefficient e.g. http://www.lpl.arizona.edu/~rlorenz/spaceball.pdf Have any full tanks ever done so? They would surely experience much higher loads. I wonder, can solid hydrazine detonate? (Columbia doesnt count as it started the entry with thermal protection) |
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Feb 21 2008, 07:42 AM
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#64
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Senior Member Group: Moderator Posts: 3233 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
I am still waiting for the video from the missile. Don't tell me they didn't put one on it...
Hey my tax dollars paid for this, I don't think it is too much to ask for a video of said impact -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Feb 21 2008, 07:49 AM
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#65
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
They need time to clean out the aliens from the footage.
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Feb 21 2008, 08:07 AM
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#66
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
I would, however, really like to know if there's some sort of substance out there that's safe to fly to coat the tanks with, something that might promote intense spot-heating during reentry. I don't know; maybe a layer of magnesium coated with plastic to keep the O2 out pre-launch, or even just a few strategically-placed patches of same? One other thing about such "vent-patches" is that they might blow under some circumstances during a launch failure & dump the crap before it's anywhere close enough to habitable areas to cause problems. Well, Nick, looks like there have been some studies along the lines of your thoughts. I was looking at one of the sci.space.* groups and pulled this signal out of the noise -- An Overview of Demise Calculations... |
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Feb 21 2008, 08:19 AM
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#67
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Member Group: Members Posts: 599 Joined: 26-August 05 Member No.: 476 |
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Feb 21 2008, 09:00 AM
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#68
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Member Group: Members Posts: 146 Joined: 23-August 06 From: Vriezenveen, Netherlands Member No.: 1067 |
How much more space debree is now orbiting Earth?
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Feb 21 2008, 09:44 AM
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#69
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Senior Member Group: Members Posts: 3648 Joined: 1-October 05 From: Croatia Member No.: 523 |
And, more importantly, anyone know if there's a possibility for updated orbital elements of the bulk of the debris cloud so we skygazers could go out and hope for reentry fireballs at certain times?
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Feb 21 2008, 09:54 AM
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#70
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
How much more space debree is now orbiting Earth? Quite a lot, but below an altitude of any active vehicle and it'll be gone within a few weeks. China's ASAT test debris, however, continues to endanger LEO vehicles (including ISS, Hubble etc) , and will do so for many years to come. There's a Press conf. at 1200UT today I think ( http://www.defenselink.mil/news/newsarticle.aspx?id=49024 ) Doug |
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Feb 21 2008, 09:58 AM
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#71
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
Immediately after the impact there was quite a lot but by now there is likely to be very little and by this time next week virtually none. The dynamics of the situation have stacked the odds very much in favour of this being a very clean strike.
Timing it to coincide with a full lunar eclpise may entirely coincidental or even have been useful for some aspects of the exercise but I can't help thinking that at some point in the planning there were a bunch of military types hovering over some Cassini (and New Horizons) Kodak Moments thinking - "Guys these are cool and all but I know how we can get an even better shot". I'm waiting for that tracking shot that shows the moment of impact against a backdrop of a red-brown lunar disc. |
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Feb 21 2008, 11:12 AM
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#72
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Member Group: Members Posts: 257 Joined: 18-December 04 Member No.: 123 |
Apparent FEMA document outlining the satellite reentry and potential response etc.
One statement says that ninety-nine percent of the debris will renter the atmosphere within one week. The same as the original reentry timeline of the intact satellite I think. http://88.80.13.160/wiki/US_spy_satallite_shootdown_briefing -------------------- Turn the middle side topwise....TOPWISE!!
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Guest_Sunspot_* |
Feb 21 2008, 11:12 AM
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#73
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Guests |
As expected some of the British press are using the event to take some not so subtle digs at the United States....drawing attention to their criticism of the Chinese test, without realising much of the criticism of that event came from the scientific community highlighting how insanely stupid it was.
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Feb 21 2008, 11:23 AM
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#74
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
Which bits of the British Media? I've got some letter writing to do it seems
What I simply can't believe I'm reading is Chinese criticism of this. That defies belief. Doug |
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Guest_Sunspot_* |
Feb 21 2008, 11:29 AM
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#75
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Guests |
It was the lead story on Newsnight last night....and the first thing the presenter asked. Sadly the press are unable to see past the politics of these events... and see how totally different they are.
LOL.. you've got to laugh at this quote from China: QUOTE Spokesman Liu Jianchao said: "China is continuously following closely the possible harm caused by the US action to outer space security and relevant countries.
"China requests the US to fulfil its international obligations in real earnest and provide to the international community necessary information and relevant data in a timely and prompt way so that relevant countries can take precautions." |
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