[FPSPACE] Failure is the expected result of current NASA impact detection effort

[E.P. Grondine]

Hi Jens - 

You write
>Should an SW3 impact be deemed certain, the approximate
>impact site will be known at the same time.

I don't think that that kind of accuracy 
will be possible. With gravitational perturbations,
it will be tough getting it down to hit or miss.
This is a cometary debris stream, not an asteroid.

Adequate tracking for the SW3 fragments will have 
to be in place by 11 years from now, by 2021. 

This places us exactly at the point Astronaut
Schweikert has spoken about earlier - no one nation is
going to be able to act alone, as it could accidentally 
deflect an impactor into another country.

E.P. Grondine
Man and Impact in the Americas

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