Xref: utzoo sci.electronics:3051 sci.astro:2192 comp.dcom.modems:1937 comp.misc:2533 rec.ham-radio:5008 Path: 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 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