[time-nuts] RE: Zeeman effect and tuning cesium clocks

Bill Hawkins bill at iaxs.net
Sat Jan 22 19:56:19 EST 2005


Another reference to cesium accuracy can be found in a
Power Point presentation at:

http://www.schriever.af.mil/GPS/PAWG/PAWG%201999/papers/12hrper.ppt

Satellite SVN#36 (whatever that is - NOAA?) appeared to
experience a failure of the magnetic shields of its FTS
tube. They discovered the problem when the frequency 
changed by about +/- 2 x 10E-12 as it rotated through the
Earth's field. They show the math for calculating the
frequency error in terms of delta magnetic field.

Regards,
Bill Hawkins






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