Path: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!news.giganews.com.POSTED!not-for-mail NNTP-Posting-Date: Sat, 04 May 2024 15:46:19 +0000 Date: Sat, 4 May 2024 10:46:19 -0500 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Tom Roberts Subject: Re: Perfect clocks Newsgroups: sci.physics.relativity References: <05f42940-be0f-4dc7-afd6-8370f88b557bn@googlegroups.com> <1qsmp8o.1jwlg3v1xk01r5N%nospam@de-ster.demon.nl> <1qso39s.m68wpff47vhtN%nospam@de-ster.demon.nl> <6a1c3b297bdda349a4b060c84dd8807a@www.novabbs.com> <17ca6e610e072624$155218$255119$c2265aab@news.newsdemon.com> <401105f9fddb89f13f72c90d06d51dab@www.novabbs.com> <17cac6a1570a540d$155221$255119$c2265aab@news.newsdemon.com> <671d6b9802b5dfaf9672774e1d4ae9ed@www.novabbs.com> <17cad465c14cd941$213827$253407$c2565adb@news.newsdemon.com> <8e14b528a9e8821ba273553468d337a5@www.novabbs.com> <17caeeb49636d324$155222$255119$c2265aab@news.newsdemon.com> <17cb6c5970c8b2e3$172133$261710$c2065a8b@news.newsdemon.com> Content-Language: en-US In-Reply-To: <17cb6c5970c8b2e3$172133$261710$c2065a8b@news.newsdemon.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Message-ID: Lines: 30 X-Usenet-Provider: http://www.giganews.com X-Trace: sv3-HS6dPsX2VZLewYe4FRlmrSfy0GhfFToRDlfslNzBIYopUepSctC/wZg8QauzDje+mi3wduutb1gRkUy!n5TxOB7hiM5ibPZqDamQKXlMPljm6nOkjNFDyjmKYpnKMbUvW1PFobX+ZqqWob5ohv5JNOoIFQ== X-Complaints-To: abuse@giganews.com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 3101 On 5/1/24 12:06 PM, Maciej Wozniak wrote: > sane people, as anyone can check at GPS, keep assuming the second to > be 9 192 631 770 on Earth, This is not an "assumption", this is the definition of the second -- that's what these words mean. > but 9 192 631 774 on a GPS satellite. This is not true. NOBODY thinks that (except some deranged idiots around here). On a GPS satellite, the usual definition of the second applies. But in order for the SIGNALS from GPS satellites to be received on earth at the correct frequencies, the time-base on the satellite must tick about 4 parts in 10^10 more slowly than a corresponding time-base on earth's geoid (mean sea level). It turns out that the correction to the satellite time-base to cancel the blueshift of the signals is also the correction required to keep the satellite clocks in sync with standard clocks on earth's geoid, over long periods of time (days to years). So the indicated time of satellite clocks advances with this (slightly slower) time-base. This is not happenstance, and is a check on the internal consistency of General Relativity. Wozniak should stop making stuff up and pretending it is true -- that's useless. Tom Roberts