Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Judah Levine"'
Autor:
Judah Levine
Publikováno v:
Position, Navigation, and Timing Technologies in the 21st Century
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::707e9d5389035bb47b2ec312b7a330ac
https://doi.org/10.1002/9781119458449.ch29
https://doi.org/10.1002/9781119458449.ch29
Autor:
Roger C. Brown, Thomas E. Parker, Bijunath R. Patla, Elizabeth A. Donley, William C. Yates, Michael A. Lombardi, Jeff Sherman, Douglas D. Sutton, Vladislav Gerginov, Benjamin K. Stuhl, Jian Yao, Glenn K. Nelson, Andrew N. Novick, Judah Levine, Ladan Arissian, Victor S. Zhang, Matthew J. Deutch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e60c1da6bbce44619a98965ca39c1a94
https://doi.org/10.6028/nist.tn.2187
https://doi.org/10.6028/nist.tn.2187
Publikováno v:
Metrologia. 60:014001
This paper explains the considerations that were important in 1972, when the current leap second procedure was adopted, to maintain a close connection between UTC, the international reference time scale, and UT1—a time scale based on the rotation o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2f8ec26f9480bba3e4d1f90f414fa40b
https://doi.org/10.1088/1681-7575/ac9da5
https://doi.org/10.1088/1681-7575/ac9da5
Autor:
Judah Levine
Publikováno v:
Journal of research of the National Institute of Standards and Technology. 125
In this study, I used standard statistical tools (such as the various forms of the two-sample Allan variance) to characterize the clocks in computers, and I show how the results of this study are used to design algorithms to synchronize the computer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01321de2f835465c290f321c808b9469
https://pubmed.ncbi.nlm.nih.gov/35465392
https://pubmed.ncbi.nlm.nih.gov/35465392
Autor:
Andrew D. Ludlow, Stephan Schaffer, Jeff Sherman, Thomas E. Parker, Judah Levine, Daniele Nicolodi, Jian Yao, Xiaogang Zhang, Tara M. Fortier, K. Beloy, Stefania Romisch, W. F. McGrew, Holly Leopardi, R. J. Fasano, Joshua J. Savory
Publikováno v:
Navigation. 65:601-608
This paper describes the recent National Institute of Standards and Technology (NIST) work on incorporating an optical clock into a time scale. We simulate a time scale composed of continuously operating commercial hydrogen masers and an optical freq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d201842579f3d55887bd08c3e0b7717
https://doi.org/10.1002/navi.248
https://doi.org/10.1002/navi.248
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 65:127-134
This paper discusses how to build a time scale with an intermittently-operated optical clock. In particular, it gives suggestions on how long and how often to run an optical clock. It also explores the benefits of having an optical clock in a time sc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dbbdabb593f29dfe07e5f8ef3ae6dd5
https://doi.org/10.1109/tuffc.2017.2773530
https://doi.org/10.1109/tuffc.2017.2773530
Autor:
John Robinson, Thomas Legero, Dhruv Kedar, Jian Yao, Fritz Riehle, Judah Levine, Tara M. Fortier, Holly Leopardi, Tobias Bothwell, William R. Milner, Uwe Sterr, Jeff Sherman, Eric Oelker, D. G. Matei, Jun Ye, Colin Kennedy
We demonstrate a time scale based on a phase stable optical carrier that accumulates an estimated time error of $48\pm94$ ps over 34 days of operation. This all-optical time scale is formed with a cryogenic silicon cavity exhibiting improved long-ter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f2fdf3f8efb6f0ed6f452bb068f10d2
http://arxiv.org/abs/1907.03184
http://arxiv.org/abs/1907.03184
Autor:
Jian Yao, Holly Leopardi, W. F. McGrew, Tara M. Fortier, K. Beloy, R. J. Fasano, Andrew D. Ludlow, Thomas E. Parker, Christopher W. Oates, Joshua J. Savory, Xiaogang Zhang, Judah Levine, Scott A. Diddams, Daniele Nicolodi, Stefania Romisch, Stefan A. Schäffer, Jeff Sherman
Publikováno v:
Phys Rev Appl
A time scale is a procedure for accurately and continuously marking the passage of time. It is exemplified by Coordinated Universal Time (UTC), and provides the backbone for critical navigation tools such as the Global Positioning System (GPS). Prese
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9f86b455977eaf1dffca41dfe72b7a5
http://arxiv.org/abs/1902.06858
http://arxiv.org/abs/1902.06858
Autor:
Judah Levine
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 63:561-570
A method is presented for synchronizing the time of a clock to a remote time standard when the channel connecting the two has significant delay variation that can be described only statistically. The method compares the Allan deviation of the channel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58c595552bf464adbe90ee6a8f9460f7
https://doi.org/10.1109/tuffc.2015.2495014
https://doi.org/10.1109/tuffc.2015.2495014
Autor:
David W. Allan, Judah Levine
Publikováno v:
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 63:513-519
Over the past 50 years, variances have been developed for characterizing the instabilities of precision clocks and oscillators. These instabilities are often modeled as nonstationary processes, and the variances have been shown to be well-behaved and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc5699b9aaf7afc8bc8cd5132a70c653
https://doi.org/10.1109/tuffc.2016.2524687
https://doi.org/10.1109/tuffc.2016.2524687