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Time-Distance Helioseismology with f Modes as a Method for Measurement of Near-Surface FlowsTravel times measured for the f mode have been used to study flows near the solar surface in conjunction with simultaneous measurements of the magnetic field. Previous flow measurements of doppler surface rotation, small magnetic feature rotation, supergranular pattern rotation, and surface meridional circulation have been confirmed. In addition, the flow in supergranules due to Coriolis forces has been measured. The spatial and temporal power spectra for a six-day observing sequence has been measured.
Document ID
20000013961
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Duvall, Thomas L., Jr.
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Gizon, Laurent
(Hansen (W. W.) Experimental Physics Lab. Stanford, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publisher: Kluwer Academic Publishers
Subject Category
Solar Physics
Funding Number(s)
CONTRACT_GRANT: NAG5-3077
Distribution Limits
Public
Copyright
Other

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