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US To Shoot Down Dying Satellite
A user writes "US officials say that the Pentagon is planning to shoot down a broken spy satellite expected to hit the Earth in early March. We discussed the device's decaying orbit late last month. The Associated Press has learned that the option preferred by the Bush administration will be to fire a missile from a U.S. Navy cruiser, and shoot down the satellite before it enters Earth's atmosphere. 'A key concern ... was the debris created by Chinese satellite's destruction -- and that will also be a focus now, as the U.S. determines exactly when and under what circumstances to shoot down its errant satellite. The military will have to choose a time and a location that will avoid to the greatest degree any damage to other satellites in the sky. Also, there is the possibility that large pieces could remain, and either stay in orbit where they can collide with other satellites or possibly fall to Earth.'"
Since this is a severely decayed orbit I would suspect most debris to reenter within the same timeframe or shortly thereafter, 1-2 weeks. I also doubt it will create any debris fields in a useful orbit. Anyway, the only reason the military would do this in the first place is to ensure a complete destruction of the spacecraft. Break it up into small pieces beforehand and the reentry will take care of the rest. Otherwise, why bother! Or target practice?
Iraq billions
This satellite was never able to communicate to the ground. Its orbit was never finished off, which is why it decayed so much as to reenter the atmosphere after 15 months after launch. If they shoot this satellite down, the pieces will still almost all re-enter. The main reason for shooting it down, more than likely is to make sure the fuel doesn't make it past the very upper atmosphere, as well as to ensure that no one unscrupulous gets any technology. The kinetic energy delivered by the missile won't overcome the energy needed to kick the debris back into orbit, so there won't be a debris field.
The reson we are doing this is obvious - to demonstrate to the world (and the Chinese) that was have functional ASAT capability.
I think the reason is more because various agencies are worried that the satellite will end up falling in someplace while Russia or China and the intact pieces will give these countries examples to reverse engineer or clues as to US capabilities. I believe the satellite is supposed to be the newest generation of spy sats so it's probably full of interesting little tech.
"When you sit with a nice girl for two hours, it seems like two minutes. When you sit on a hot stove for two minutes, it
And from TFA (again, emphasis mine):
It doesn't seem as if "shooting down" the satellite is really going to cause much more damage than re-entry and impact will...for this reason, my money's on either target practice for our benefit, or, more likely, a not-so-subtle demonstration of our space superiority.
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~ |rip/\/\aster /\/\onkey
You can learn a lot from a busted piece of machinery.
Heh, or not. One of the things Britain did during WW II was to leave bits of busted machinery (electronics) that not only never worked, but were designed to be deliberately misleading, at the occasional aircraft crash site in German-occupied territory. The idea was to keep German radar scientists, etc, busy chasing down wrong paths if/when they recovered the equipment. (Which they did; recovering any kind of radar-related gear from Allied aircraft was a high priority for them.)
-- Alastair