Re: N.B.S. Time Service

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Article #19199

#19199

From: Greg Woods
Date: Mon, 06 Jun 1988 20:26

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In article <585@otto.COM> glenn@otto.UUCP (Glenn Scott) writes:
>  In addition, the "speed of light delay" via satellite shouldn't be much
>different than the speed of light delay over a copper wire...

  WRONG! Via satellite, the signal must travel 44,000 miles (22,000 each
way to geosynchronous orbital height). Since light is about 186,000 miles
a second, we're up to nearly a quarter second delay. Over a land line from
Nevada to Colorado, we're talking a few hundred miles. This is a significant
difference.

--Greg

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-lcc!ames!ncar!woods

References: <455@trane.UUCP> <4691@watcgl.waterloo.edu> <585@otto.COM>

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!lll-winken!lll-lcc!ames!ncar!woods
From: woods@ncar.ucar.edu (Greg Woods)
Newsgroups: sci.electronics,sci.astro,comp.dcom.modems,comp.misc,rec.ham-radio
Subject: Re: N.B.S. Time Service
Keywords: Time Ticks
Message-ID: <317@ncar.ucar.edu>
Date: 6 Jun 88 20:26:19 GMT
References: <455@trane.UUCP> <4691@watcgl.waterloo.edu> <585@otto.COM>
Reply-To: woods@handies.UCAR.EDU (Greg Woods)
Organization: Scientific Computing Division/NCAR, Boulder CO
Lines: 10

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