On the multispacecraft determination of periodic surface wave phase speeds and wavelengths

Observations of surface waves on the magnetopause indicate a wide range of phase velocities and wavelengths. Their multispacecraft analysis allows a more precise determination of wave characteristics than ever before and reveal shortcomings of approximations to the phase speed that take a predetermi...

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Autores principales: Foullon, C., Farrugia, C.J., Fazakerley, A.N., Owen, C.J., Gratton, F.T., Torbert, R.B.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_21699402_v115_n9_p_Foullon
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_21699402_v115_n9_p_Foullon2023-10-03T16:40:11Z On the multispacecraft determination of periodic surface wave phase speeds and wavelengths Foullon, C. Farrugia, C.J. Fazakerley, A.N. Owen, C.J. Gratton, F.T. Torbert, R.B. Observations of surface waves on the magnetopause indicate a wide range of phase velocities and wavelengths. Their multispacecraft analysis allows a more precise determination of wave characteristics than ever before and reveal shortcomings of approximations to the phase speed that take a predetermined fraction of the magnetosheath speed or the average flow velocity in the boundary layer. We show that time lags between two or more spacecraft can give a qualitative upper estimate, and we confirm the unreliability of flow approximations often used by analyzing a few cases. Using two-point distant magnetic field observations and spectral analysis of the tailward magnetic field component, we propose an alternative method to estimate the wavelength and phase speed at a single spacecraft from a statistical fit to the data at the other site. Copyright 2010 by the American Geophysical Union. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_21699402_v115_n9_p_Foullon
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Observations of surface waves on the magnetopause indicate a wide range of phase velocities and wavelengths. Their multispacecraft analysis allows a more precise determination of wave characteristics than ever before and reveal shortcomings of approximations to the phase speed that take a predetermined fraction of the magnetosheath speed or the average flow velocity in the boundary layer. We show that time lags between two or more spacecraft can give a qualitative upper estimate, and we confirm the unreliability of flow approximations often used by analyzing a few cases. Using two-point distant magnetic field observations and spectral analysis of the tailward magnetic field component, we propose an alternative method to estimate the wavelength and phase speed at a single spacecraft from a statistical fit to the data at the other site. Copyright 2010 by the American Geophysical Union.
format JOUR
author Foullon, C.
Farrugia, C.J.
Fazakerley, A.N.
Owen, C.J.
Gratton, F.T.
Torbert, R.B.
spellingShingle Foullon, C.
Farrugia, C.J.
Fazakerley, A.N.
Owen, C.J.
Gratton, F.T.
Torbert, R.B.
On the multispacecraft determination of periodic surface wave phase speeds and wavelengths
author_facet Foullon, C.
Farrugia, C.J.
Fazakerley, A.N.
Owen, C.J.
Gratton, F.T.
Torbert, R.B.
author_sort Foullon, C.
title On the multispacecraft determination of periodic surface wave phase speeds and wavelengths
title_short On the multispacecraft determination of periodic surface wave phase speeds and wavelengths
title_full On the multispacecraft determination of periodic surface wave phase speeds and wavelengths
title_fullStr On the multispacecraft determination of periodic surface wave phase speeds and wavelengths
title_full_unstemmed On the multispacecraft determination of periodic surface wave phase speeds and wavelengths
title_sort on the multispacecraft determination of periodic surface wave phase speeds and wavelengths
url http://hdl.handle.net/20.500.12110/paper_21699402_v115_n9_p_Foullon
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