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View Full Version : US satellite to enter atmosphere around March 6: US diplomat


Chief
02-16-2008, 06:42 AM
http://www.spacedaily.com/2006/080215154433.84uvtddv.html

An out-of-commission US spy satellite will enter the Earth's atmosphere on or around March 6 if Washington fails with its plans to shoot it down, a top US diplomat said on Friday.

"If the engagement fails, the satellite is expected to make an uncontrolled re-entry into the Earth's atmosphere on or about 6 March 2008 in any region on the Earth's surface between 58.5 degrees North and 58.5 degrees South latitudes," said Christina Rocca, US ambassador to the Geneva-based Conference on Disarmament (CD).

"Whether the engagement succeeds or fails, the United States is prepared to offer assistance to governments to mitigate the consequences of any satellite debris impacts on their territory", she added.

"This extraordinary engagement ... is not part of an anti-satellite development and testing programme."

US President George W. Bush has ordered a US warship to shoot down the bus-sized satellite, which contains an estimated 1,000 pounds of toxic propellant, before it crashes to earth, US officials said Thursday.


As I understand it, the shoot down attempt will be sometime next week, after Atlantis returns from it's current mission to the ISS. If the return is delayed, then expect the shootdown to be delayed because NASA will not take any chances with the shuttle being hit with any kind of debris.

It will be interesting to see the video of this shootdown once it's completed....

Waterbuffalo
02-16-2008, 09:57 AM
Wonder which ship gets to do the shooting down? Wonder if the NRO will be having fun playing Pacman with coordinates..

Chief
02-17-2008, 06:26 AM
Go read the article, there are several Aegis Class vessels that will be used on this mission. The Aegis radar system is capable of tracking an object in Low Earth Orbit like this satellite, and are quite capable of shooting it.

The only question is, can the break it up well enough to diminish the risks?

As I understand it, the main hydrazine fuel tank is still full, and could easily survive reentry because it is a fairly smooth aerodynamic metal sphere. That much hydrazine is extremely dangerous...

The other extreme hazard is that there is some sort of beryllium liner in the spacecraft, and that too could easily survive reentry. Beryllium is extremely toxic and causes a fatal condition known as "berylliosis" in people who come in contact with it. It's long been used in weapons and spacecraft technology because it is a very hard (but very reactive) metal.