Concepedia

Primary Frequency Standards

Primary Frequency Standards is a formal metrological framework that defines the most accurate realization of the second in the International System of Units, based on unperturbed atomic transitions and serving as the foundational reference for all frequency measurements.

153

Publications

8.3K

Citations

506

Authors

123

Institutions

Publications per year

2017–2026

32

Parents

Publications

153

Accuracy evaluation of NIST-F1

Steven R. Jefferts, J.H. Shirley, T.E. Parker et al. · Metrologia · 2002 · 399 citations

, , +15

An Accurate Flux Density Scale from 50 MHz to 50 GHz

The Astrophysical Journal Supplement Series · 2017 · 365 citations · Full text

, , +10

NIST-F1: recent improvements and accuracy evaluations

Thomas P. Heavner, Steven R. Jefferts, Elizabeth A. Donley et al. · Metrologia · 2005 · 352 citations

, , +14

An Accuracy Algorithm for an Atomic Time Scale

D.W. Allan, H. Hellwig, D.J. Glaze · Metrologia · 1975 · 290 citations

, , +16

Speed of Light from Direct Frequency and Wavelength Measurements of the Methane-Stabilized Laser

K. M. Evenson, J. S. Wells, F. R. Petersen et al. · Physical Review Letters · 1972 · 244 citations

, , +15

1–5 of 153

Authors

506

  1. TP
    T.E. Parker

    National Institute of Standards and Technology, United States

    21 publications · 2K citations

    16

    h-index

  2. SR
    Steven R. Jefferts

    National Institute of Standards and Technology, United States

    15 publications · 1.4K citations

    12

    h-index

  3. TP
    Thomas P. Heavner

    National Institute of Standards and Technology, United States

    14 publications · 1.5K citations

    12

    h-index

  4. JS
    J.H. Shirley

    National Institute of Standards and Technology, United States

    13 publications · 1.1K citations

    11

    h-index

  5. FL
    Filippo Levi

    Istituto Nazionale di Ricerca Metrologica, Italy

    12 publications · 983 citations

    11

    h-index

1–5 of 506

Institutions

123

  1. National Institute of Standards and Technology

    Gaithersburg, United States

    25 h-index

    193 publications

    19.5K citations

  2. National Physical Laboratory

    London, United Kingdom

    12 h-index

    34 publications

    2K citations

  3. Physikalisch-Technische Bundesanstalt

    Braunschweig, Germany

    10 h-index

    43 publications

    2.9K citations

  4. Bureau international des poids et mesures

    Sèvres, France

    9 h-index

    12 publications

    591 citations

  5. Observatoire de Paris

    Paris, France

    9 h-index

    36 publications

    4.2K citations

  6. Centre National de la Recherche Scientifique

    Paris, France

    9 h-index

    53 publications

    3.3K citations

  7. Systèmes de Référence Temps-Espace

    Paris, France

    8 h-index

    38 publications

    5.2K citations

  8. National Research Council Canada

    Ottawa, Canada

    8 h-index

    24 publications

    570 citations

1–8 of 123

Venues

  1. Metrologia

    46 publications · 3.8K citations

    30

    h-index

  2. 18

    h-index

  3. 6

    h-index

  4. Nature Communications

    3 publications · 350 citations

    3

    h-index

  5. Physical Review Letters

    PRL · 3 publications · 368 citations

    3

    h-index

1–5