Moreover most of actual GPS receivers are indoor capable (once got a lock with the antenna outside). I have briefly tested the uBlox and the NavSync for this feature and it works as expected. On Wed, Feb 22, 2012 at 11:52 AM, pablo alvarez < pabloalvarezsanchez@gmail.com> wrote: > I would not fully trust NTP, and as already explained taking your GPS > outside as a reference for just a while is not really going to help. > But..why not using GPS inside the building? Some receivers are quite > sensitive, so probably you will not need an external antenna to pick up a > signal. Probably you may have to throw a cable from floor to floor, or > place your antenna close to a window, but this is much simpler than > installing an antenna on a roof. You will not get ns accuracy, but to make > worse than 100us you will need a hell of a lot of reflections inside your > building. > > Cheers, > > pablo > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >