Hi All, I've just realised I don't understand something. Something quite basic.
Primary Standards are ones which don't have to be calibrated against others. My understanding is that Caesium and Hydrogen masers are Primary Standards (in our field). Secondary Standards are calibrated against the Primary Standards. My understanding is that Rubidium is an example of a Secondary Standard. So I can calibrate my Rubidium clocks by adjusting the C Field. All good. But why is it that Caesium Clocks and Hydrogen Masers have an adjustment facility? And what about the clocks used to determine UTC around the world? Do they have an adjustment facility? What are they adjusted to? Wouldn't that make them Secondary Standards? Now I'm aware that the "average" of those clocks is UTC, so are those clocks adjusted regularly to get closer to that average? I'm sure someone can clear this up for me. Regards, Jim _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
