Search Results - "Petit, Gérard"

Sub-10–16 accuracy GNSS frequency transfer with IPPP by Petit, Gérard

“…Precise point positioning (PPP) using dual-frequency GNSS code and phase measurements has been the technique of choice for time and frequency transfer for more…”
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Precise time scales and navigation systems: mutual benefits of timekeeping and positioning by Tavella, Patrizia, Petit, Gérard

“…The relationship and the mutual benefits of timekeeping and Global Navigation Satellite Systems (GNSS) are reviewed, showing how each field has been enriched…”
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The Hyperfine Transition for the Definition of the Second by Arias, Elisa Felicitas, Petit, Gérard

“…The unit of time of the International System of Units (SI), the “atomic second” was defined through a constant of physics in 1967. It is derived from the…”
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Intercontinental comparison of optical atomic clocks through very long baseline interferometry by Pizzocaro, Marco, Sekido, Mamoru, Takefuji, Kazuhiro, Ujihara, Hideki, Hachisu, Hidekazu, Nemitz, Nils, Tsutsumi, Masanori, Kondo, Tetsuro, Kawai, Eiji, Ichikawa, Ryuichi, Namba, Kunitaka, Okamoto, Yoshihiro, Takahashi, Rumi, Komuro, Junichi, Clivati, Cecilia, Bregolin, Filippo, Barbieri, Piero, Mura, Alberto, Cantoni, Elena, Cerretto, Giancarlo, Levi, Filippo, Maccaferri, Giuseppe, Roma, Mauro, Bortolotti, Claudio, Negusini, Monia, Ricci, Roberto, Zacchiroli, Giampaolo, Roda, Juri, Leute, Julia, Petit, Gérard, Perini, Federico, Calonico, Davide, Ido, Tetsuya

“…The comparison of distant atomic clocks is foundational to international timekeeping, global positioning and tests of fundamental physics. Optical-fibre links…”
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A broadband VLBI system using transportable stations for geodesy and metrology: an alternative approach to the VGOS concept by Sekido, Mamoru, Takefuji, Kazuhiro, Ujihara, Hideki, Kondo, Tetsuro, Tsutsumi, Masanori, Kawai, Eiji, Hachisu, Hidekazu, Nemitz, Nils, Pizzocaro, Marco, Clivati, Cecilia, Perini, Federico, Negusini, Monia, Maccaferri, Giuseppe, Ricci, Roberto, Roma, Mauro, Bortolotti, Claudio, Namba, Kunitaka, Komuro, Jun’ichi, Ichikawa, Ryuichi, Suzuyama, Tomonari, Watabe, Ken-ichi, Leute, Julia, Petit, Gérard, Calonico, Davide, Ido, Tetsuya

“…We have developed a broadband VLBI (very long baseline interferometry) system inspired by the concept of the VLBI Global Observing System (VGOS). The new…”
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SI-traceable measurement of an optical frequency at the low 10 -16 level without a local primary standard by Hachisu, Hidekazu, Petit, Gérard, Nakagawa, Fumimaru, Hanado, Yuko, Ido, Tetsuya

“…SI-traceable measurements of optical frequencies using International Atomic Time (TAI) do not require a local primary frequency reference, but suffer from an…”
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Geodetic methods to determine the relativistic redshift at the level of 10-18 in the context of international timescales: a review and practical results by Denker, Heiner, Timmen, Ludger, Voigt, Christian, Weyers, Stefan, Peik, Ekkehard, Margolis, Helen S., Delva, Pacôme, Wolf, Peter, Petit, Gérard

“…The frequency stability and uncertainty of the latest generation of optical atomic clocks is now approaching the one part in 10 18 level. Comparisons between…”
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On the relativistic rate shift of frequency standards by Petit, Gérard

“…Comparison of distant frequency standards calls for the computation of their relativistic rate shift. This paper reviews the present needs and the methods used…”
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La Dénomination by PETIT, Gérard

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Absolute Calibration of an Ashtech Z12-T GPS Receiver by Petit, Gérard, Jiang, Zhiheng, White, Joe, Beard, Ronald, Powers, Edward

“…Dual-frequency carrier phase and code measurements from geodetic type receivers are a promising tool for frequency and time transfer. In order to use them for…”
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Optimal traceability to the SI second through TAI by Petit, Gerard, Panfilo, Gianna

“…The frequency of a secondary frequency standard needs to be determined in the SI, by comparison to that of the Cs hyperfine transition. When no direct…”
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High accuracy continuous time transfer with GPS IPPP and T2L2 by Leute, Julia, Petit, Gerard, Exertier, Pierre, Samain, Etienne, Rovera, Daniele, Uhrich, Pierre

“…We present a comparison of time transfer results over European baselines obtained with two space-based techniques: Precise Point Positioning with integer…”
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The TAIPPP pilot experiment by Petit, G.

“…Time transfer techniques using GNSS carrier phase and code signals are increasingly used in time metrology. In order to study the introduction of these…”
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Science in media and social discourse: new channels of communication, new linguistic forms by BEACCO, JEAN-CLAUDE, CLAUDEL, CHANTAL, DOURY, MARIANNE, PETIT, GÉRARD, REBOUL-TOURÉ, SANDRINE

“…Scientific knowledge is no longer transmitted solely through a one-way channel of communication from scientific communities to 'lay' readers through the…”
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Absolute frequency measurement with uncertainty below $$1\times 10^{-15}$$ using International Atomic Time by Hachisu, Hidekazu, Petit, Gérard, Ido, Tetsuya

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Absolute frequency measurement with uncertainty below 1×10-15 using International Atomic Time by Hachisu, Hidekazu, Petit, Gérard, Ido, Tetsuya

“…The absolute frequency of the 87 Sr clock transition measured in 2015 (Jpn J Appl Phys 54:112401, 2015 ) was reevaluated using an improved frequency link to…”
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The IAU 2009 system of astronomical constants: the report of the IAU working group on numerical standards for Fundamental Astronomy by Luzum, Brian, Capitaine, Nicole, Fienga, Agnès, Folkner, William, Fukushima, Toshio, Hilton, James, Hohenkerk, Catherine, Krasinsky, George, Petit, Gérard, Pitjeva, Elena, Soffel, Michael, Wallace, Patrick

“…In the 2006–2009 triennium, the International Astronomical Union (IAU) Working Group on Numerical Standards for Fundamental Astronomy determined a list of…”
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Progress in Carrier Phase Time Transfer by Ray, Jim, Arias, Felicitas, Petit, Gérard, Springer, Tim, Schildknecht, Thomas, Clarke, Jon, Johansson, Jan

“…The progress of the joint Pilot Project for time transfer, formed by the International GPS Service (IGS) and the Bureal International des Poids et Mesures…”
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High Performance Clocks and Gravity Field Determination by Müller, J., Dirkx, D., Kopeikin, S. M., Lion, Guillaume, Panet, Isabelle, Petit, Gérard, Visser, Pieter N. A. M.

“…Time measured by an ideal clock crucially depends on the gravitational potential and velocity of the clock according to general relativity. Technological…”
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The IAU 2000 Resolutions for Astrometry, Celestial Mechanics, and Metrology in the Relativistic Framework: Explanatory Supplement by Soffel, M., Klioner, S. A., Petit, G., Wolf, P., Kopeikin, S. M., Bretagnon, P., Brumberg, V. A., Capitaine, N., Damour, T., Fukushima, T., Guinot, B., Huang, T.-Y., Lindegren, Lennart, Ma, C., Nordtvedt, K., Ries, J. C., Seidelmann, P. K., Vokrouhlický, D., Will, C. M., Xu, C.

“…We discuss the IAU resolutions B1.3, B1.4, B1.5, and B1.9 that wereadopted during the 24th General Assembly in Manchester, 2000, andprovides details on and…”
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