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From: sheppard@caen.engin.umich.edu (Kenneth Charles Sheppardson)
Newsgroups: sci.space,sci.space.shuttle,sci.physics
Subject: Re: A Question about a HEO manned space station
Message-ID: <40220137.298d@dl298d.engin.umich.edu>
Date: 8 Dec 88 13:47:00 GMT
References: <1073@galaxy> <4429@homxc.UUCP> <2121@garth.UUCP> <17976@agate.BERKELEY.EDU>
Distribution: na
Organization: U of M Engineering, Ann Arbor, Mich.
Lines: 24

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In article <17976@agate.BERKELEY.EDU>, maniac@garnet.berkeley.edu (George W. Herbert) writes:
> In article <401907a2.5e37@dl5e37.engin.umich.edu> I wrote:
>
>>LEO <=> 100-500 nautical miles ( 200-1000 km )
>>HEO <=>    >500 nautical miles (    >1000 km )
> 
> pardon, but since when is 500 miles=1000 km?
> even nautical miles...
> really, 500 nm=925 km 
> (close, but no cigar?...)
> -george william herbert

Actually, if I wanted to be picky I'd point out that:

     1 nm = 1852 m   =>   500 nm = 926 km
                                     ^
...but then since my original statement was intended only as a general guideline/rule of 
thumb, and since the limits aren't that clearly defined, I see no reason for me to be picky.

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                                                          Ken Sheppardson
                                                          sheppard@caen.engin.umich.edu