TAI zone?

[David Magda]

On Jul 1, 2011, at 13:41, Paul Koning wrote:

> Interesting article.  It says that the active medium is cesium, but then mentions a resonant frequency that is not the one used in the definition of the second.  So either the author is very confused and pulled a random number out of the air, or we're dealing with a different resonance than the standard one.  In that case, it is entirely unclear how stable it is.  It might be similar to the one used in the definition of the second, or it might be very different (like rubidium, or worse).

The chip in question:

http://tinyurl.com/67znzrt
http://www.symmetricom.com/products/frequency-references/chip-scale-atomic-clock-csac/SA.45s-CSAC/
http://www.jackson-labs.com/index.php/products/csac

http://www.google.com/search?q=CSAC+SA.45s