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Pastimes : Shuttle Columbia STS-107 -- Ignore unavailable to you. Want to Upgrade?

To: Bill Jackson who wrote (408)	2/6/2003 11:04:11 AM
From: Clarksterh	Read Replies (1) \| Respond to of 627

Bill - Two objects in near earth orbit will never differ by 2 miles per second if they are in 2 orbits a few hundred miles different in size(unless there is great eccentricity in one). No. No offense is intended, but this is absolutely untrue. Imagine one spacecraft is in a polar orbit and one going around the equator. They are each going about 5 miles per second, but the relative velocity at the point where the two orbits cross is huge (about 7 miles per second). And the space station is in a much more polar orbit than the shuttle was. Hence the large velocity differential. Clark