The clocks (rubidium and cesium) in the GPS satellites are also run at a different frequency because of their altitudes....
Also magnetic field are different on the earth and they sometimes adjust the "C" fields to correct for these differences. >> Isn't the temperature the _only_ thing to correct for? > > No, not at all. Read the links that I provided to see that a real > cesium standard is not quite so simple, at least when you get > down to the ten to the -13, -14, -15 levels. At that level there > are all sorts of cool things that push or pull the frequency and > need to be corrected for. > >> The definition of the second is "...the duration of 9 192 631 770 >> periods of the radiation corresponding to the transition between the >> two hyperfine levels of the ground state of the cesium 133 atom." (and >> affirmed by the CIPM in 1997 that this definition refers to a cesium >> atom in its ground state at a temperature of 0 K) _______________________________________________ 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.
