[90335] in North American Network Operators' Group
Re: Geo location to IP mapping
daemon@ATHENA.MIT.EDU (Charles Cala)
Tue May 16 14:00:56 2006
Date: Tue, 16 May 2006 11:00:21 -0700 (PDT)
From: Charles Cala <charles_cala@yahoo.com>
To: Marshall Eubanks <tme@multicasttech.com>, sgorman1@gmu.edu
Cc: nanog@nanog.org
In-Reply-To: <74EAD680-84F9-4BDA-BFF3-8184C560B5E7@multicasttech.com>
Errors-To: owner-nanog@merit.edu
--- Marshall Eubanks <tme@multicasttech.com> wrote:
>
> I seriously doubt this would work to better than the regional area.
>
> My zip code (20124) region is about 5 km across, which would be 15
> microseconds in vacuum, and
> maybe at most 50 micro seconds in glass. So, you would need
> accuracies at the 10's of microsecond level to specify zip codes.
don't forget, cable paths are not direct, and each bend in
the cable increases the distance that the light must
travel within the fiber. optical repeaters, optical
switches and other equipment can add distance,
(thus time) to the signal.
Please see
http://www.fiber-optics.info/fiber-history.htm
