Estimating random transverse velocities in the fast solar wind from EISCAT Interplanetary Scintillation measurements

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dc.contributor.author Breen, Andrew
dc.contributor.author Fallows, Richard A.
dc.contributor.author Canals, A.
dc.contributor.author Ofman, L.
dc.contributor.author Moran, P. J.
dc.date.accessioned 2007-10-19T08:26:45Z
dc.date.available 2007-10-19T08:26:45Z
dc.date.issued 2002-09
dc.identifier.citation Breen , A , Fallows , R A , Canals , A , Ofman , L & Moran , P J 2002 , ' Estimating random transverse velocities in the fast solar wind from EISCAT Interplanetary Scintillation measurements ' Annales Geophysicae , pp. 1265-1277 . en
dc.identifier.other PURE: 72751
dc.identifier.other dspace: 2160/344
dc.identifier.uri http://hdl.handle.net/2160/344
dc.identifier.uri http://www.ann-geophys.net/20/1279/2002/angeo-20-1279-2002.pdf en
dc.description Canals, A.; Breen, A. R.; Ofman, L.; Moran, P. J.; Fallows, R. A., Estimating random transverse velocities in the fast solar wind from EISCAT Interplanetary Scintillation measurements, Annales Geophysicae, vol. 20, Issue 9, pp.1265-1277 en
dc.description.abstract Interplanetary scintillation measurements can yield estimates of a large number of solar wind parameters,including bulk flow speed, variation in bulk velocity along the observing path through the solar wind and random variation in transverse velocity. This last parameter is of particular interest, as it can indicate the flux of low-frequency Alfv´en waves, and the dissipation of these waves has been proposed as an acceleration mechanism for the fast solar wind. Analysis of IPS data is, however, a significantly unresolved problem and a variety of a priori assumptions must be made in interpreting the data. Furthermore, the results may be affected by the physical structure of the radio source and by variations in the solar wind along the scintillation ray path. We have used observations of simple point-like radio sources made with EISCAT between 1994 and 1998 to obtain estimates of random transverse velocity in the fast solar wind. The results obtained with various a priori assumptions made in the analysis are compared, and we hope thereby to be able to provide some indication of the reliability of our estimates of random transverse velocity and the variation of this parameter with distance from the Sun. en
dc.format.extent 13 en
dc.language.iso eng
dc.relation.ispartof Annales Geophysicae en
dc.title Estimating random transverse velocities in the fast solar wind from EISCAT Interplanetary Scintillation measurements en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Mathematics and Physics en
dc.description.status Peer reviewed en


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