- From: Chris Little via GitHub <sysbot+gh@w3.org>
- Date: Tue, 09 May 2023 16:27:46 +0000
- To: public-sdwig@w3.org
@rjksmith Apologies for the delay in responding to your request for more info on synchronisation of clocks (a la Poincare). If clocks are stationary wrt each other, one clock sends its time to the second clock. Second clock set to that time and sends that time back. Clock one now has round trip time, splits the difference and tells clock two to retard its time by the same amount. Both clocks now perfectly, mathematically, synchronized, irrespective of distance between them, as outward and return legs take identical times. If clocks are moving wrt each other, the return leg takes a different time, so protocol doesn't work. Assuming message transmission speed is much greater than clocks' relative speed should be good enough (e.g. speed of light/electricity vs few metres/sec), otherwise process has to be iterated until required precision reached. HTH, Chris. PS See "A Brief History of Timekeeping" by Chad Orzel, P189 in paperback edition. -- GitHub Notification of comment by chris-little Please view or discuss this issue at https://github.com/w3c/sdw/issues/1397#issuecomment-1540497797 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Tuesday, 9 May 2023 16:27:48 UTC