In Australia, fixed vehicle speed measurement devices, such as piezoelectric loops buried in the road surface, are operated by the state road transport authorities (the police operate mobile devices such as handheld LIDARs). These have to be checked with some (typically) purpose-built device which in turn must be calibrated, using eg a calibrated rubidium standard. So there may also be some legal traceability requirement that the Rb is used to satisfy.
Cheers Michael. On Thu, Jan 2, 2020 at 8:28 AM Jeremy Nichols <[email protected]> wrote: > > Wonder why a highway department would have a rubidium standard? > > > On Wed, Jan 1, 2020 at 8:18 AM ew via time-nuts <[email protected]> > wrote: > > > There is a HP5065A with date code 28 on ebay looks like new 12 hours to go > > > > Bert Kehren > > _______________________________________________ > > 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. > > > -- > Jeremy Nichols > Sent from my iPad 6. > _______________________________________________ > 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.
