Time delay and velocity estimation methods have been widely studied subjects in the context of signal processing, with applications in many different fields of physics. The velocity of waves or coherent fluctuation structures is commonly estimated as the distance between two measurement points divided by the time lag that maximizes the cross correlation function between the measured signals, but this is demonstrated to result in erroneous estimates for two spatial dimensions. We present an improved method to accurately estimate both components of the velocity vector, relying on three non-aligned measurement points. We introduce a stochastic process describing the fluctuations as a superposition of uncorrelated pulses moving in two dimensions. Using this model, we show that the three-point velocity estimation method, using time delays calculated through cross correlations, yields the exact velocity components when all pulses have the same velocity. The two- and three-point methods are tested on synthetic data generated from realizations of such processes for which the underlying velocity components are known. The results reveal the superiority of the three-point technique. Finally, we demonstrate the applicability of the velocity estimation on gas puff imaging data of strongly intermittent plasma fluctuations due to the radial motion of coherent, blob-like structures at the boundary of the Alcator C-Mod tokamak.
机构:
Univ York, York Plasma Inst, Sch Phys Engn & Technol, York, England
Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon, Oxon, EnglandUniv York, York Plasma Inst, Sch Phys Engn & Technol, York, England
Enters, Y. W.
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Thomas, S.
Hill, M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ York, York Plasma Inst, Sch Phys Engn & Technol, York, EnglandUniv York, York Plasma Inst, Sch Phys Engn & Technol, York, England
Hill, M.
Cziegler, I.
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Univ York, York Plasma Inst, Sch Phys Engn & Technol, York, EnglandUniv York, York Plasma Inst, Sch Phys Engn & Technol, York, England
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Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
CEA, IRFM, F-13108 St Paul Les Durance, FranceUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Fedorczak, N.
Manz, P.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Assoc Euratom IPP, Max Planck Inst Plasmaphys, D-85748 Garching, GermanyUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Manz, P.
Thakur, S. C.
论文数: 0引用数: 0
h-index: 0
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Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USAUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Thakur, S. C.
Xu, M.
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h-index: 0
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USAUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Xu, M.
Tynan, G. R.
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Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USAUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Tynan, G. R.
Xu, G. S.
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h-index: 0
机构:
Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R ChinaUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Xu, G. S.
Liu, S. C.
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R ChinaUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
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Univ Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, FranceUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Fuchert, G.
Birkenmeier, G.
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h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Birkenmeier, G.
Carralero, D.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Carralero, D.
Lunt, T.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Lunt, T.
Manz, P.
论文数: 0引用数: 0
h-index: 0
机构:
Tech Univ Munich, Phys Dept E28, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Manz, P.
Mueller, H. W.
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h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Mueller, H. W.
Nold, B.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Stuttgart, Inst Grenzflachenverfahrenstech & Plasmatechnol, D-70569 Stuttgart, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Nold, B.
Ramisch, M.
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h-index: 0
机构:
Univ Stuttgart, Inst Grenzflachenverfahrenstech & Plasmatechnol, D-70569 Stuttgart, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Ramisch, M.
Rohde, V.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Rohde, V.
Stroth, U.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, Germany
Tech Univ Munich, Phys Dept E28, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Univ Tromso, Dept Phys & Technol, N-9037 Tromso, NorwayMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Garcia, O. E.
Cziegler, I.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Univ Calif San Diego, Energy Res Ctr, San Diego, CA 92103 USAMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Cziegler, I.
Kube, R.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Univ Tromso, Dept Phys & Technol, N-9037 Tromso, NorwayMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Kube, R.
LaBombard, B.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USAMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
LaBombard, B.
Terry, J. L.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USAMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
机构:
Univ York, York Plasma Inst, Sch Phys Engn & Technol, York, England
Culham Sci Ctr, Culham Ctr Fus Energy, Abingdon, Oxon, EnglandUniv York, York Plasma Inst, Sch Phys Engn & Technol, York, England
Enters, Y. W.
论文数: 引用数:
h-index:
机构:
Thomas, S.
Hill, M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ York, York Plasma Inst, Sch Phys Engn & Technol, York, EnglandUniv York, York Plasma Inst, Sch Phys Engn & Technol, York, England
Hill, M.
Cziegler, I.
论文数: 0引用数: 0
h-index: 0
机构:
Univ York, York Plasma Inst, Sch Phys Engn & Technol, York, EnglandUniv York, York Plasma Inst, Sch Phys Engn & Technol, York, England
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
CEA, IRFM, F-13108 St Paul Les Durance, FranceUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Fedorczak, N.
Manz, P.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Assoc Euratom IPP, Max Planck Inst Plasmaphys, D-85748 Garching, GermanyUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Manz, P.
Thakur, S. C.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USAUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Thakur, S. C.
Xu, M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USAUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Xu, M.
Tynan, G. R.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USAUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Tynan, G. R.
Xu, G. S.
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R ChinaUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
Xu, G. S.
Liu, S. C.
论文数: 0引用数: 0
h-index: 0
机构:
Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R ChinaUniv Calif San Diego, Ctr Momentum Transport & Flow Org, San Diego, CA 92093 USA
机构:
Univ Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, FranceUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Fuchert, G.
Birkenmeier, G.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Birkenmeier, G.
Carralero, D.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Carralero, D.
Lunt, T.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Lunt, T.
Manz, P.
论文数: 0引用数: 0
h-index: 0
机构:
Tech Univ Munich, Phys Dept E28, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Manz, P.
Mueller, H. W.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Mueller, H. W.
Nold, B.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Stuttgart, Inst Grenzflachenverfahrenstech & Plasmatechnol, D-70569 Stuttgart, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Nold, B.
Ramisch, M.
论文数: 0引用数: 0
h-index: 0
机构:
Univ Stuttgart, Inst Grenzflachenverfahrenstech & Plasmatechnol, D-70569 Stuttgart, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Ramisch, M.
Rohde, V.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
Rohde, V.
Stroth, U.
论文数: 0引用数: 0
h-index: 0
机构:
Max Planck Inst Plasma Phys, D-85748 Garching, Germany
Tech Univ Munich, Phys Dept E28, D-85748 Garching, GermanyUniv Lorraine, Inst Jean Lamour, CNRS, UMR 7198, F-54506 Vandoeuvre Les Nancy, France
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Univ Tromso, Dept Phys & Technol, N-9037 Tromso, NorwayMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Garcia, O. E.
Cziegler, I.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Univ Calif San Diego, Energy Res Ctr, San Diego, CA 92103 USAMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Cziegler, I.
Kube, R.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Univ Tromso, Dept Phys & Technol, N-9037 Tromso, NorwayMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
Kube, R.
LaBombard, B.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USAMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
LaBombard, B.
Terry, J. L.
论文数: 0引用数: 0
h-index: 0
机构:
MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USAMIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA