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Topic Area: Time and Frequency
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Displaying records 41 to 50 of 60 records.
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41. Phase-lock Loops in Vibration Environments
Topic: Time and Frequency
Published: 11/16/2009
Authors: Archita Hati, Craig W Nelson, David Allan Howe
Abstract: A popular scheme for achieving low phase noise across a large range of offset frequencies is to employ an oscillator at an output frequency with low far-from-carrier noise that is phase-locked to a reference that has low close-to-carrier noise. We i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904373

42. Two-Way Satellite Time and Frequency Transfer Using 1 MChip/S codes
Topic: Time and Frequency
Published: 11/16/2009
Authors: Victor Shufang Zhang, Thomas Edward Parker, Demetrios Matsakis, Joseph Achkar, Daniele Rovera, Dirk Piester, Andreas Bauch, Luca Lorini
Abstract: The Ku-band transatlantic and Europe to Europe two-way satellite time and frequency transfer (TWSTFT) operations used the 2.5 MChip/s pseudo-random codes with 3.5 MHz bandwidth until the end of July, 2009. The cost of TWSTFT operation is associated w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904297

43. Optical frequency stabilization of a 10 GHz Ti:sapphire frequency comb by saturated absorption spectroscopy in 87Rubidium
Topic: Time and Frequency
Published: 11/4/2009
Authors: Dirk Heinecke, Albrecht Bartels, Tara Michele Fortier, Danielle Braje, Leo Hollberg, Scott A Diddams
Abstract: The high power per mode of a recently-developed 10 GHz femtosecond Ti:sapphire frequency comb permits nonlinear Doppler-free saturation spectroscopy in 87Rubidium with a single mode of the comb. We use this access to the natural linewidth of the Rub ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903059

44. WWVB Radio Controlled Clocks: Recommended Practices for Manufacturers and Consumers (2009 edition)
Series: Special Publication (NIST SP)
Report Number: 960-14-09
Topic: Time and Frequency
Published: 9/8/2009
Authors: Michael A Lombardi, Andrew N Novick, John P Lowe, Matthew J Deutch, Glenn K Nelson, Douglas D Sutton, William C Yates, D. Wayne Hanson
Abstract: Radio controlled clocks represent a true revolution in timekeeping. Clocks that synchronize to NIST radio station WWVB now number in the millions in the United States, and new sales records are being established every year. As a result, many of us a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903649

45. Establishment of the SIM Time Scale
Topic: Time and Frequency
Published: 8/1/2009
Authors: J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, Michael A Lombardi
Abstract: The SIM time and frequency metrology working group has developed a comparison network for the Americas, with the goals of improving metrology in the SIM region and to allow as many countries as possible to participate in the network. As of May 2008, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903998

46. The global positioning system, relativity, and extraterrestrial navigation
Topic: Time and Frequency
Published: 4/27/2009
Author: Neil Ashby
Abstract: Relativistic effects play an important role in the performance of the Global Positioning System (GPS) and in world-wide time comparisons. The GPS has provided a model for algorithms that take relativistic effects into account. In the future explorati ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904814

47. The SIM Time Network and its Contributions to Metrology in the Americas
Topic: Time and Frequency
Published: 4/1/2009
Author: Michael A Lombardi
Abstract: The SIM Time Network (SIMTN) has been one of the great success stories of the Sistema Interamericano de Metrologia (SIM), a regional metrology organization (RMO) that includes the 34 member nations of the Organization of American States (OAS). The S ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902059

48. The SIM Time and Frequency Network
Topic: Time and Frequency
Published: 12/1/2008
Authors: Michael A Lombardi, Andrew N Novick, Jose M. Lopez, Francisco Jimenez, Jean-Simon Boulanger, Raymond Pelletier, Ricardo de Carvalho, Raul Solis, Carlos Donado, Harold Sanchez, Carlos Andres Quevedo, Gregory Pascoe, Daniel Perez
Abstract: The {I}Sistema Interamericano de Metrologia{/I} (SIM) consists of national metrology institutes (NMIs) located in the 34 member nations of the Organization of American States (OAS), which extends throughout North, Central, and South America, and the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842555

49. Establishment of the SIM Time Scale
Topic: Time and Frequency
Published: 10/22/2008
Authors: Michael A Lombardi, Nelida Diaz-Munoz, J. Mauricio Lopez-Romero
Abstract: The SIM time and frequency metrology working group has developed a comparison network for the Americas, with the goals of improving metrology in the SIM region by allowing as many countries as possible to participate in the network. As of May 2008, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842495

50. Handbook of Frequency Stability Analysis
Series: Special Publication (NIST SP)
Report Number: 1065
Topic: Time and Frequency
Published: 7/1/2008
Authors: William Riley, David Allan Howe
Abstract: This handbook, which can be used as both a tutorial and a reference, describes practical techniques for frequency stability analysis. It covers the definitions of frequency stability, measuring systems and data formats, pre-processing steps, analysis ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50505



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