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Path: ...!news.nobody.at!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: "Paul.B.Andersen" <relativity@paulba.no> Newsgroups: sci.physics.relativity Subject: Re: Space-time interval (2) Date: Thu, 15 Aug 2024 13:18:31 +0200 Organization: A noiseless patient Spider Lines: 23 Message-ID: <v9ko4r$ue44$1@dont-email.me> References: <YqTjbAPdSf8P-veYFHQCI8eskLU@jntp> <3lzcd1NKCT13xkV8yvlh8oaa3Mg@jntp> <v9fdeg$3rh2a$1@dont-email.me> <jBxUcP6BzIhx3lL1WyQctHmm7jo@jntp> <v9g6ij$3vsfg$1@dont-email.me> <AVa827R_LOez7mc5Ad3CT6GyhiA@jntp> <327c4ebc77dc16239ac38f00b508451b@www.novabbs.com> <17eb7db913381cc9$330199$505029$c2365abb@news.newsdemon.com> <ZmtVAt4HhKe0jdT-a3px1duKdmw@jntp> <v9i8c5$bvnu$9@dont-email.me> <VOohu46_lYfs6YEQG8qZQKYepNw@jntp> <v9i9ni$bvnu$10@dont-email.me> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Thu, 15 Aug 2024 13:17:47 +0200 (CEST) Injection-Info: dont-email.me; posting-host="77af041fb089df128c38b356cbe2f58e"; logging-data="997508"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19cRGzxP9tf9CQF4i8nrG2D" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:wJw5HPtwccBega+csMo1kHAPmiY= Content-Language: en-GB In-Reply-To: <v9i9ni$bvnu$10@dont-email.me> Bytes: 2135 Den 14.08.2024 14:59, skrev Python: > Le 14/08/2024 à 14:54, M.D. Richard "stuffed-shirt Hachel" Lengrand a > écrit : >> >> We can't synchronize all the watches in our 3D universe. > > This is nevertheless done (in ECI frame of reference when it > comes to GPS, or in Earth frame for airports as Paul tried, > in vain, to explain to you). Since Oslo is 8 degrees east of Paris, UTC clocks in Oslo and Paris are not absolute synchronous in the ground frame, because the ground is moving in the ECI-frame. But the difference is so minute that the clocks are synchronous in the ground frame _within 1 second_. I saw no reason to explain this to Richard. -- Paul https://paulba.no/