On Mon, Mar 11, 2019 at 4:04 PM Bob kb8tq <[email protected]> wrote: > > Hi > > A “proper” timing device with antenna is a sub $100 sort of thing. It will be > < 100 ns pretty much forever and ever.
"Proper" for pulsar radio astronomers, at least professional ones, tends to be a hydrogen maser(s)... > > Bob > > > On Mar 11, 2019, at 4:44 PM, Steve Olney <[email protected]> wrote: > > > > Hi Bob, > > > > On 12/03/2019 12:19 am, Bob kb8tq wrote: > >> I doubt you will find this sort of information in any spec sheet on a > >> basic GPS. The only practical > >> answer is going to be “try it and see”. > > > > Yes - agreed. I was hoping someone would have tried it already on the GPS > > 16 HVS unit as has been done for a different unit... > > > > https://blog.dan.drown.org/navspark-timer-drift-2/ > > > > ...which returns about 0.1 ms drift in phase over 15 minutes. > > > > I'll do a test as suggested elsewhere between a locked GPS and one which is > > in invalid fix condition. > > > >> If this is for some sort of large scale system, that may not > >> be the right way to do it…… > > > > No - it's not a large scale system. I want to time-stamp my Vela pulsar > > data. Just recently I detected a glitch in the pulsar (the first amateur > > radio astronomer to ever do so with any pulsar AFAIK)... > > > > http://www.astronomerstelegram.org/?read=12466 > > > > The professional guys were impressed with my data, but slightly > > disappointed it didn't have accurate time-stamping. I am working to rectify > > that for the next glitch. > > > > Cheers > > > > Steve > > > > HawkRAO > > > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
