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Topic Area: Time and Frequency
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Displaying records 21 to 30 of 59 records.
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21. High Spectral purity oscillator at 40 GHz: Design using air-dielectric Cavity
Topic: Time and Frequency
Published: 6/2/2010
Authors: Archita Hati, Craig W Nelson, Billy F Riddle, David Allan Howe
Abstract: We describe the design of a low-PM noise 40 GHz oscillator that uses a conventional air-dielectric cavity resonator as a frequency discriminator to clean up the PM noise of a commercial 10 GHz dielectric resonator oscillator (DRO) multiplied by four. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906039

22. How Accurate is a Radio Controlled Clock?
Topic: Time and Frequency
Published: 3/1/2010
Author: Michael A Lombardi
Abstract: This paper discusses the factors that determine the accuracy of radio controlled clocks. The topics covered including the accuracy of the time signal station, path delay, synchronization errors, and the time error that accumulates between synchroniz ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903949

23. Hyper-Ramsey spectroscopy of optical clock transitions
Topic: Time and Frequency
Published: 7/22/2010
Authors: Christopher W Oates, V. I. Yudin, A. V. Taichenachev, Zeb Barber, Nathan D. Lemke, Andrew D Ludlow, U Sterr, Ch. Lisdat, F Riehle
Abstract: We present nonstandard optical Ramsey schemes that use pulses individually tailored in duration, phase and frequency to cancel spurious frequency shifts related to the excitation itself. In particular, the field shifts and their uncertainties can be ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906618

24. In Search of a New Primary GPS Receiver for NIST
Topic: Time and Frequency
Published: 11/26/2012
Author: Marc A Weiss
Abstract: A previous publication showed problems with the current NIST Time and Frequency Division primary GPS receiver [1] when used for Precise Point Positioning (PPP)-based carrier phase time transfer. We confirm that, for this receiver, boundary discontinu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912972

25. Limits on GPS Carrier Phase Time Transfer
Topic: Time and Frequency
Published: 11/16/2009
Author: Marc A Weiss
Abstract: The stability of differential delays between Global Navigation Satellite receivers is critical for time and frequency transfer. We study the limit of this transfer between two specific receivers from the study of data taken from these receivers whil ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904263

26. Low-Frequency Characterization of MEMS-Based Portable Atomic Magnetometer
Topic: Time and Frequency
Published: 6/2/2010
Authors: Rahul R. (Rahul) Mhaskar, Svenja A Knappe, John E Kitching
Abstract: Atomic magnetometers based on absorption or polarization rotation of light in an alkali vapor have recently demonstrated sensitivities rivaling those of superconducting quantum interference devices (SQUIDs). Miniaturization of such devices containing ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906104

27. Measurement and real-time cancellation of vibration-induced phase noise in a cavity-stabilized laser
Topic: Time and Frequency
Published: 8/30/2010
Authors: Michael J. (Michael) Thorpe, David R Leibrandt, Tara Michele Fortier, Till P Rosenband
Abstract: We demonstrate a method to measure and actively reduce the coupling of vibrations to the phase noise of a cavity-stabilized laser. This method uses the vibration noise of the laboratory environment rather than active drive to perturb the optical cav ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905732

28. Medium-Term Frequency Stability of Hydrogen Masers as Measured by a Cesium Fountain
Topic: Time and Frequency
Published: 6/2/2010
Authors: Thomas Edward Parker, Steven R Jefferts, Thomas Patrick Heavner
Abstract: Abstract Hydrogen masers are used extensively in time scale ensembles, but the frequency drift must be accurately known. NIST-F1, the cesium fountain primary frequency standard at the National Institute of Standards and Technology, now operates nearl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906021

29. NIST Computer Time Services: Internet Time Service (ITS), Automated Computer Time Service (ACTS), and time.gov Web Sites
Series: Special Publication (NIST SP)
Report Number: 250-59
Topic: Time and Frequency
Published: 1/1/2002
Authors: Judah Levine, Michael A Lombardi, Andrew N Novick
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105384

30. NIST Time and Frequency Broadcasts from Radio Stations WWVB, WWV, and WWVH
Topic: Time and Frequency
Published: 1/1/2001
Authors: Matthew J Deutch, E Farrow, John P Lowe, Glenn K Nelson, Dean T Okayama, D Patterson, Douglas D Sutton, William C Yates
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=105183



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