RE: DS2-Orbital Bombardment

>Andrew Martin [SMTP:Al.Bri@xtra.co.nz]
>So what's the distance from earth's surface for a roughly
>circular orbit that is six times 15 minutes or 1.5 hours in duration?
Any
>physicists on the list that can tell us?

This is an easy one, mate.  
90 min orbit is about the same as the Space Shuttle, altitude around
300-400km.
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