https://groups.google.com/forum/#!topic/comp.protocols.time.ntp/P7qY3gBvHTM
On Friday, April 25, 2014 1:09:45 AM UTC-5, Evandro Menezes wrote: > The NTP ST1 server at the University of Houston has been offline for about a month. Any information about its demise? Yet another victim of a DOS attack? Alan Pfeiffer-Traum from UH was kind enough to explain: "tick.uh.edu has been offline to the internet since mid-February. About that time we saw a sudden sharp increase in traffic from many sources. The high level of traffic overwhelmed tick and made it unusable. We hope that this event will eventually fade away so we can allow access to the service again." On Fri, Feb 6, 2015 at 5:37 PM, <walter.preunin...@gmail.com> wrote: > On Friday, February 6, 2015 at 3:38:14 PM UTC-6, William Unruh wrote: > > > > Is there any reason why I could not share the PPS output of say, my > u-blox 7 GPS module on multiple computers? Would it be good or bad to peer > these 2 systems with each other? > > > > By share you mean run the PPS output to each of the computers? The main > > thing you would need to do is make sure that the gps is able to handle > > the current load, and that the signals had the appropriate level at each > > of the computers. > > Yes, exactly what I mean. > > > > > > > > > > On the opposite end of the spectrum, would it be reasonable to have a > PPS output from said module on a computer, with a second PPS (from another > GPS module) on that same computer? > > > > Sure. you need to have two differnt interrupt lines available (GPIO, > > serial ports, parallel ports) > > > > Awesome! > > > > > > > The Chronodot/DS323X chips have 1 Hz sqaure wave output and they have > +/- 2ppm. It seems that the ATOM clock driver could be used, but would it > be better to write a driver specifically for this chip? > > > > 2PPM is not that great. That is one second out per 6 day. A minute out > > per year. > > What is that chip. > > > > I was thinking more as a worst case, offline for hours situation. Perhaps > a new driver could 'sync' the Dallas Semiconductor/Maxim DS3231 OXCO Real > Time Chip periodically. > > What is the ppm error of the RTC in a pc or my MacBook? > > > > Does someone know the admin of tick.uh.edu? I am not getting a > response from them or the server. > > > > What reponse do you want? Why should they respond to you? > > I would like to use tick.uh.edu as one of my 'local' Stratum 1's. I have > 1 from Oklahoma, but I'm in Texas... and the server is either down, or the > name has changed on Pulic Strat 1's list hasnt been updated. > > _______________________________________________ > questions mailing list > questions@lists.ntp.org > http://lists.ntp.org/listinfo/questions > _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions
