dc.contributor.author | Foullon, Claire | |
dc.contributor.author | Farrugia, Charles J. | |
dc.contributor.author | Fazakerley, Andrew | |
dc.contributor.author | Owen, Christopher J. | |
dc.contributor.author | Gratton, F.T. | |
dc.contributor.author | Torbert, R.B. | |
dc.date.accessioned | 2013-08-22T12:59:27Z | |
dc.date.issued | 2010-10-02 | |
dc.description.abstract | 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. | en_GB |
dc.identifier.citation | Vol. 115 (A9), article A09203 | en_GB |
dc.identifier.doi | 10.1029/2009JA015189 | |
dc.identifier.uri | http://hdl.handle.net/10871/12881 | |
dc.language.iso | en | en_GB |
dc.publisher | American Geophysical Union (AGU) | en_GB |
dc.subject | Kelvin-Helmholtz | en_GB |
dc.subject | magnetopause | en_GB |
dc.subject | boundary layer | en_GB |
dc.title | On the multispacecraft determination of periodic surface wave phase speeds and wavelengths | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2013-08-22T12:59:27Z | |
dc.description | Copyright © 2010 American Geophysical Union (AGU) | en_GB |
dc.identifier.eissn | 2169-9402 | |
dc.identifier.journal | Journal of Geophysical Research: Space Physics | en_GB |