Paul J. Ste. Marie said: >> Hmm. In the UK the working timetable (not the public one) is written to a >> precision of half a minute. > This wasn't the timetable. Its main purpose, as I understood it, was to > provide a record of where trains were, or where the dispatchers thought they > were, in the event of an accident.
Okay. > The logged locations weren't stops on the lines. Hmm, they may well be logging each track circuit transition (I belive that SSIs here do that). In which case a second is about the right granularity; TRs normally have a delayed pick of a couple of seconds for safety reasons, and the reporting time from trackside module to interlocking runs on a basic cycle of several hundred milliseconds. So a 1 second error isn't going to faze anyone. -- Clive D.W. Feather | If you lie to the compiler, Email: cl...@davros.org | it will get its revenge. Web: http://www.davros.org | - Henry Spencer Mobile: +44 7973 377646 _______________________________________________ LEAPSECS mailing list LEAPSECS@leapsecond.com http://six.pairlist.net/mailman/listinfo/leapsecs
